Showing posts with label grade inflation. Show all posts
Showing posts with label grade inflation. Show all posts

Monday, July 15, 2019

5.0 (And Higher) GPAs In High School - or College? Preposterous Nonsense!

Image result for brane space, John Phillips
John Phillips, left, taught Advanced level Biology and Chemistry at Harrison College for twenty years. Andy Haynes, recently retired Chair of Physics Dept, taught Advanced Level Physics. Both acknowledged that any grades in the 4.0 plus range are total bollocks.

Kyle Kashuv, alleged to have had a 5.345 grade point average at Marjory Stoneman Douglas high school, in Parkland, FL.


When I recently discussed the explosion of  ultra high GPAs in U.S. high schools with former colleagues at Harrison College, most were in sheer disbelief.  They admitted there is no way in hell any student, no matter how bright he or she believes,  could score over 100%  in any of their Advanced level courses. And certainly not the equivalent percentage to a 5.345 overall  GPA, i.e. as gun supporter Kyle Kashuv reportedly did at Parkland,  Florida's Marjory Stoneman Douglas High.

When I spoke with Andy Haynes, former HC Physics dept. chair 2 years ago,  he said the path to such outlandish "untethered from reality" GPAs and grades began soon after U..S. schools implemented AP classes and honors programs in earnest.  According to Haynes:  "They somehow believed because a student was enrolled in some honors course or was taking AP classes he was entitled to be marked at a much higher 'gear' than other students.  Of course, that's foolishness!"

Haynes pointed out the similarities between AP classes and Advanced level courses in Bim while also noting that most students in the latter don't even attain a highest mark of 80.  That's because: a) classes are marked on a much less expansive scale, i.e. NO student is expected to even come close to perfection irrespective of which course level, and b)  the level of course work was far too rigorous to be earning "super" marks, i.e. in excess of traditional academic norms - in this case exceeding a highest level of 100% or a 4.0 GPA.

Both Haynes and retired Biology lecturer John Phillips (20 years at HC)  agreed with me that a supra 4.0 GPA can only be obtained in an academic environment in which standard Gaussian grade distributions are ignored in favor of a confected alternative. This is  given that an exam deemed proper for a specific  level -  whether a 3rd year Harvard course in astrophysics- OR a 2nd year Harrison College Course in Advanced level Physics - should possess considerable discriminatory power.  

So, even in a class of 30 Harvard  astrophysics over-achievers (or 25 HC Chemistry or Physics A-Level counterparts)  it ought to be possible to separate out the 10 percent or so who demonstrate peak excellence and really merit A's. This as opposed to having such an absurdly easy test that 40 percent or more get A's off it.   Nor should anyone achieve grades or marks (using "weighted"schemes) that "escape academic gravity".  That is,  in excess of the upper limit of a standard Gaussian grading curve, whether 4.0 or 100 %.

As I have argued in previous posts, the lack of discriminatory power in grading and the level of difficulty of coursework, assignments automatically lends itself to overly generous American high school marking schemes.  In the case of 4.0 -plus GPAs  it is a result of  systemic grade inflation by virtue of awarding honors (or AP students) a significantly much higher potential GPA (one student posting on Reddit claimed an 8.0 GPA) than their non-AP, non-Honors course pursuing peers.   This is done via so-called "weighting".

For example, under one high school's current weighting scheme (defined in its Student Handbook) , a standard unweighted 'A' tallies a GPA of 4.0 (93-96% range)  while  an "honors" weight translates to 5.33 and an AP weight to 6.33.   Averaging out the latter, and even with lower grades (an honors 'B' gets 4.33 and an AP B gets 5.33)   leads to the inflated GPA.  (This is a prime reason HC does not use grade point averages in performance evaluations, only percentages achieved.)

The reasoning is that if the courses are much more difficult at that level, then the upper limit of the marks or GPA needs to be weighted higher.  To which Messrs. Haynes and Phillips have offered: "Nonsense! You score at the same level with the same maximum. No extra margins. If a kid maxes out tests all the time then it's clear your tests, homework are too easy!"

Both then referred to the Advanced-level courses at HC which are equivalent to 1st, 2nd year university level and for which no weighted grades are allotted. Students earn what they earn and on a regular marking scheme.

At Harrison College,  for example, anything below 50 % was an F, no arguments. Grades from 50-60 rated a D mark, from 61-70 a C, and From 71-80 a B. Marks higher than 80 earned an A but virtually no student attained a 93 % the usual starting point for an A in the U.S. The reason is that exams at HC are genuinely difficult - so much so that even the 'cream of the crop' will seldom if ever score 100%

Some examples of  A-level physics (P) and Biology (B)problems from past HC exam papers:

1) (P) Certain meteorites (tektites) found on Earth have a composition identical with that of lunar granite. It is thought that they may be the debris from a volcanic eruption on the Moon. The graphic shown (which is not to scale) shows how the gravitational potential between the surface of the Moon and the surface of the Earth varies along the line of centers.:



At the point P the gravitational potential is a maximum.

(a)By considering the separate contributions of the Earth and the Moon to the gravitational potential, explain qualitatively why the graph has a maximum and why the curve is asymmetrical.

(b) State how the resultant gravitational force on the tektite at any point between the Moon and the Earth can be deduced from the diagram.

(c) When a tektite is at P the gravitational force on it due to the Moon and Earth are FM and FE, respectively. Hence, find the value of x/y, where x and y are the distances of P from the center of the Moon and the center of the Earth.

(d) If a tektite is to reach the Earth, it must be projected from the volcano on the Moon with a certain minimum speed, vo.  Making use of appropriate values from the diagram, find this minimum speed. Explain your reasoning.

(e) Discuss very briefly whether a tektite will reach the Earth’s surface with a speed less than, equal to or greater than the speed of projection. (Neglect atmospheric resistance).


Data: Mass of Moon  = 7.4 x 1022 kg,

Mass of Earth = 6.0 x 1024 kg.


2) (P) Compare the maximum velocities of a simple pendulum bob of mass m (= 0.1 kg) if an experiment in evaluating energy change is conducted on both Mars and Earth at the same time, for the same deflection angle Θ and length, L = 1.0 m. (Take the acceleration of gravity on Earth as 9.8 N/kg,and on Mars as 3.7 N/kg) Compare also the potential energy in each case. Why or why not would these be different? (Take the deflection angle Θ = 15 degrees in each experiment.)


3) (B) a) The mutation rate for human albinism is u = 0.00001. (e.g. 1 in every 100,000). If the equilibrium frequency q = 0.01, what is the reduction in fitness?

b)Blatella Germanica, the German cockroach,  has the following identified alleles:
D- resistance to the pesticide dieldrin
d- non-resistance

After some defined time, the population exhibits the following three genotypes: DD, Dd and dd

If over time, each dd and Dd roach produces one offspring, and each DD produces TWO, then find:

a) the relative fitness for the DD roaches
b) the relative fitness for the Dd roaches
c) the relative fitness for the dd roaches


4) (B)Over successive generations of German roaches it can be shown that the gene frequency of the deleterious allele will be decreased by:

-Dq = - spq / (1 – sq)2

where p is the gene frequency for the favored allele ( = 0.60)

If it reproduces at a ratio of 3:2 relative to the disadvantaged allele., use this information to find:

i) The gene frequency (q) of the disadvantaged allele for the roach, and thence, the magnitude of -Dq.

ii) The values of p and q when:     -Dq = -0.07

State any assumptions made.
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While we can certainly agree the Barbadian and U.S. systems are different in key ways, it is clear the latter - from many points of view - is simply too generous, and gives exalted or exaggerated grades and marks for students. I warrant if they were suddenly put into the Bajan system their marks, GPAs would crash back to Earth in two heart beats. 

Monday, June 17, 2019

Alfie Kohn's (NY Times) Theory That "Everyone Should Get An A" Is Flat Out, Provably Wrong


"If 'everyone gets As', that means the laziest, dumbest, most unmotivated student graduates from high school with the same paper qualifications as the hardest working, brightest, and most motivated student. The result is that a high school diploma would mean virtually nothing and many employers would begin requiring a college degree for jobs that really shouldn't require one or give tests to applicants that would shock the weak "A" students when they fail these tests and reality hits"  - Comment on NY Times article.

"Well written nonsense. Abilities are distributed on a bell curve. Not everyone deserves a blue ribbon. In nearly 40 years as a university professor I have watched institutions of higher education be turned into a business" - University professor comment on NY Times article


A recent NY Times Op-ed ('Why Can't Everyone Get As?- Excellence Is Not A Zero Sum Game)  by Alfie Kohn questions why every manjack (or Jilljack) at a high  school or university can't snag an A- and besides it shouldn't be a zero sum game.  Well, I hate to break it to Mr. Kohn but it is, a zero sum game.  Meaning there must be an essential delimitation of high quality grades in any given course situation else the grades become meaningless. Further, it then become impossible to distinguish actual high quality from mediocre or poor quality work.


Mr, Kohn writes, in defense of his claim::


"Consider widespread complaints about a supposed epidemic of “grade inflation” in higher education, a claim often accompanied by indignant expostulations about young people’s sense of entitlement. The reality is that even if more students today really are getting A’s — arguably a dubious claim if we look at transcript data rather than self-reports, by the way — that doesn’t prove these grades are inflated."

Yes I am afraid it does!  Much of this can  be traced to tests-exams and even homework assignments that are much too elementary for the levels taught.  If an exam is proper for a given level -  including a 3rd year Harvard course in astrophysics or economics- it should possess considerable discriminatory power.  So, even in a class of 30 Harvard  astrophysics over-achievers it ought to be possible to separate out the 10 percent or so who demonstrate peak excellence and really merit A's. This as opposed to having such an absurdly easy test that 40 percent or more get A's off it. 

As I have argued in previous posts, the lack of discriminatory power in grading and the level of difficulty of coursework, assignments automatically lends itself to overly generous marking schemes.  That is also in combination with the use of teacher's evaluations. 

Basically, any student with more than air between the ears can extort a high grade out of a prof by merely the veiled threat of giving him a lousy evaluation. Since these evaluations are (often)  the main instruments used to assess a person for promotion or even to remain on permanent staff (as opposed to adjunct) they are critical. 

As for Kohn's citation of "transcripts" I have no idea which he's talking about but a study by Stuart Rojstaczer and Christopher Healy, and published in the prestigious Teachers College Record showed about three-fourths of all grades awarded at university level are “A's or B's."   This makes those A's and B's next to useless precisely because of their very commonality. An 'A' used to stand for academic excellence, but it can't if so many are getting them! It also renders the achievements of truly exceptional students ho-hum. How in the world can they truly stand out if middling or loser students get the same grades they do? It's preposterous!

Kohn blabs on (ibid.):

"But here’s the key point: Many critics don’t even bother to assert that grades have risen over time or are undeserved. They simply point to how many students (in a given class or school) get A’s right now, as if a sufficiently high number was objectionable on its face. ..

Grades in this view should be used to announce who’s beating whom. And if the students in question have already been sorted by the admissions process, well, they ought to be sorted again. A school’s ultimate mission, apparently, is not to help everyone learn but to rig the game so that there will always be losers."

How  in the name of Sophocles does Kohn come up with this codswallop? It isn't a question or issue of "who is beating whom" but rather who is deserving of the highest quality marks and the awards attendant on them. For example, the awards of Summa and magna cum laude are now almost meaningless because of the sheer numbers qualifying for these honors because of inflated grades.  In effect the preponderance of the awards makes them less significant.  Why not also just award Nobel Physics prizes to every top notch physics prof with a great physics theory?  Well, because then the significance of the award is degraded, rendered "common". This isn't rocket science!

Nor is it a case of "rigging the game so there will always be losers", but if we are to ferret out the true highest performers with distinguished academic excellence then achievements have to be scaled by making upper courses much more difficult in content and demands.   Thus, an astrophysics course, say AST 583 on stellar structure,  has to be profoundly more difficult than an Astronomy (AST) 200 introductory course.  That means a student who earned an'A' in the latter may only be able to snag a D or F in the former. The most likely reason? The level of mathematical difficulty of the higher level course is markedly greater and the student's mathematical aptitude is not commensurate.   The student can handle the algebra for AST 200 but not the partial differential equations necessary for AST 583.

Is this forcing students to being "sorted again"?  Well, in a way, kind of, but logically so because the professional or graduate level astrophysicist or astronomer needs to be able to use partial differential equations.  We therefore must ascertain if the student at the higher level can do the math or not. If he can't then yeah, he becomes a "loser"  with a loser's F.   We do him (or her) a major favor - assuming they haven't already figured it out after two quizzes and withdrawn in time to avoid an F.

 In the same way, in a medical school scenario one would like to have the discriminatory power of medical courses to ascertain -  before student X graduates and becomes an intern  -  he or she  has the medical basics down to not muck up a procedure. Say to deliver a spinal anesthetic without delivering 12 sticks in the wrong place first. Is this being cruel? Not at all, merely sifting through a population to identify the most qualified, competent people.

This is also why the author's next claim is absurd, i.e.

"This makes no sense in any context. Perhaps, for example, we can justify rating states or nations based on the quality of their air, health care or schools, but ranking them is foolish. Relative performance tells us nothing of interest because all of them may be shamefully low — or impressively high — on whatever measure we’re using. Comparative success just gives the winner bragging rights (“We’re No. 1!”)."

Again, failing to process that the separation of genuine quality from the mediocre isn't just a matter of subjective interest.  It matters a great deal if an astrophysics student is given a pass in that AST 583 course, then goes on to muck up spectroscopic, astrometric or photometric data at an Observatory.  It matters a great deal if a med school student is passed and allowed to  intern (e.g. in anesthesiology)  if he doesn't even know basics about anesthesia - and delivers an overdose of fentanyl to a patient.  So no, it's not merely a matter of giving winners "bragging rights" but rather ensuring genuine recognition of competence, i.e. which says this person is truly qualified to undertake a photometric analysis of Beta Lyrae in an Observatory on his own. OR, to deliver an epidural anesthetic prior to a prostate cancer's brachytherapy template procedure - without mucking it up!

We see more bollocks emerging near the end of Kohn's piece:

"Framing excellence in these competitive terms doesn’t lead to improvements in performance. Indeed, a consistent body of social science research shows that competition tends to hold us back from doing our best. It creates an adversarial mentality that makes productive collaboration less likely"

Most of all, it encourages the false belief that excellence is a zero-sum game. It would be both more sensible and more democratic to rescue the essence of the concept: Everyone may not succeed, but at least in theory all of us could."


Yes, in theory most of us "could succeed" IF we picked the right contexts and settings to do so. If, for example, we grasped our forte was in art and not science - so chose to major in the works of the "masters" rather than stellar astrophysics.  But that usually isn't the case, hence the high rate of true grade inflation - not to mention the colossal rate of medical errors in this country, as well as academicians producing papers with suspect results that don't hold up to scrutiny.  Demand more  rigorous standards and competition and these missteps and calamities likely don't appear.

Another reason for lack of sufficient performance standard  is entering 'winner take all sweepstakes' that do not ensure we will prevail over extreme competition. According to the authors of  'The Winner Take All Society' (Ch. 6, 'Too Many Contestants?', p. 102):

"Market incentives typically lure too many contestants into winner take all markets, and too few into other careers. One reason involves a well documented human frailty: the tendency to overestimate our chances of prevailing over our competitors."

Adding:

"The decision to compete in a winner take all market is akin to buying a lottery ticket. If you win you win many times more than if you were in a less risky career. If you lose, you earn much less."


One major example is the glut of those pursuing Ph.D.'s so that the over supply generates not tenured track profs but tens of thousands of adjunctsIf there were fewer people chasing Ph.D.s, i.e. who wanted to become academics,  there'd be more chances for others to succeed, say in tenure track positions. But with the mass of newly minted post docs flooding academia, there simply aren't enough permanent academic positions available. The glut means universities can afford to offer only cheap positions with no benefits, e.g. adjuncts. This forlorn lot then have to patch together teaching at multiple sites, while often ending up on food stamps, e.g.

http://chronicle.com/article/From-Graduate-School-to/131795/


I suppose here too Kohn would whine about the "terrible" universities and cheapskate administrations creating "too many losers" with their "comparative rankings"  leading to an indentured prof system. But let's pause to consider it's the sheer glut of apparent similar quality (via the Ph.D.) that created this cheap labor pool.  This is given every manjack with that parchment now believes he merits the highest position in the halls of Ivy-  but will now be brutally disabused by the reality of excess competition for those few choice posts.  Cut the pool of hopefuls down by 50-60 percent and university departments would have to respond in more generous ways.


While I am at it, let me skewer another trope that's been making the rounds, i.e. in another NY Times article, that "maybe students are just a lot smarter and there is no real grade inflation".  This hearkens back to the absurd premise of the Flynn effect, where most Americans are allegedly getting smarter and smarter each year as gauged by standard IQ tests. The phenomenon of incrementally increasing IQ first circulated in 1984, following a study in that year by James R. Flynn, purporting to show that citizens in advanced nations like the U.S. have experienced massive IQ gains over  time.

Thus Americans – for example – have gained 3 IQ points per decade from the early 1900s to today, as reflected in both the Stanford –Binet and Wechsler Intelligence scales. By another test’s standards (the Raven’s Progressive Matrices) – for which scores go back to people born in 1872- the gains disclosed amount to 5  IQ points per decade. So a guy with the same genetic background who was born in 1910 and had an IQ of 100 then, would attain an IQ of 160 by 1970 thanks to the Flynn effect, or equal to the (accepted) IQ of Einstein. 

Of course, the Flynn effect is supposed to apply to a statistical ensemble, not individuals - but I use the example of an individual measure over decades to make the point the claim is nonsense.  Even if we just stick to ensembles, it is foolish. Using the Raven’s and scored against today’s norms,  our ancestors in 1910 would have an average IQ of 70, or about moron level. By comparison, our mean IQ today – that is, disclosed within the ‘hump’ portion of a Gaussian distribution – would range from 130 to 150 depending on the test. For reference, 130 basically gets you into Mensa (accepting the top 2% of IQs) and 150 marks you as a “genius”. Are we all geniuses on our way to becoming Über-Geniuses? I don’t think so!  Neither are all the cum laude honors recipients at Harvard really cum laude quality.  They achieved that honor via a skewed grading system.

Most importantly, the ranks of neither Mensa or Intertel have increased markedly - nor have the potential members who would be accepted.  (Taking into account all those who've no interest in joining either one). Select a random sample of the populace, say 10,000 or 50,000 – and dispatch them to sit the Mensa and Intertel IQ tests. Those making the cut will still be only 2% and 1%, respectively, as has been the case for decades.  You will not find 50 percent getting through, or even 20 percent.

And you will certainly not find the mammoth proportions now receiving cum laude honors! An anomaly that suggests that either the courses taken are way too easy, or the professors - TAs are marking assignments, exams too easy.

Make no mistake, because of grade inflation, students use 'Rate My Professor' to  avoid professors who believe the grade of “C” is the average grade and who set up standards that require students to do more than show up, read a couple of hundred pages, and answer a few questions. This then translates into fewer students in the more rigorous courses that also feature more no nonsense profs.


Bottom line:  Kohn's piece is just another paean to entitlement or the next thing: generalizing honors (and A's) so any manjack can lay claim to them. Thereby destroying any special significance in the process.  At the same time, he raises false expectations in too many that hey, they do have the right to get A's - even if they just show up for class.

Thursday, July 5, 2018

Thanks To Grade Inflation University 'Cum Laude' Honors Are Now Meaningless

In May, 2013, I cited a study by Stuart Rojstaczer and Christopher Healy, published in the prestigious Teachers College Record , revealing that about three-fourths of all grades awarded at university level are “A”s or “B”s.   As I observed at the time, this makes those As and Bs next to useless precisely become of the very commonality. An 'A' used to stand for academic excellence, but it can't if so many are getting them! It also renders the achievements of truly exceptional students ho-hum. How in the world can they truly stand out if middling or loser students get the same grades they do? It's preposterous!

I went on to point out that if one went back to the mid 1960s such a college level grade anomaly would not be found, unless it was at some "Flunky U" or maybe a junior college. What did one find, say at Loyola University- New Orleans, or the University of South Florida?  Well, the proportion of As were fairly stable at about 10 percent, with Bs at 20 percent, and 'gentleman's Cs' right at around 40 percent where they ought to be.  Hence, in a General Physics class of 400 students - say at USF-  one expected to see maybe 40 As, 80 Bs, 160 Cs, 80 Ds and 40 Fs.

In other words, grade frequency conformed to the standard Gaussian distribution or normal curve. Similarly, at the other end of the curve Ds would make up 20 percent and Fs 10 percent. Even in the typical astronomy class, say astrophysics - the grade distribution tended to follow the same pattern. So for maybe 10 students in AST 443, 1 would receive an A,  two got Bs, four received Cs,  two received Ds and there was one F.

But what do we find today? Barely 5 percent Ds, if that many,  and zero percent Fs! Essentially, college teachers today - tenured profs as well as adjuncts- have given away the "grade store" and sold out . This has occurred either from capitulating to threats of bad teacher evaluations, or kowtowing to pesky ass parents who insist Junior and Missy not be docked points on a critical test.

So, given this shabby situation it's no surprise one reads (e.g. 'You Graduated Cum Laude? So Did Everyone Else',  WSJ, p. A2, July 3):

"Honors designations have become close to the norm at many top schools, according to a Wall Street Journal review of the criteria for earning honors and the percentage of the senior class that got the designation in the top 50 of the WSJ/Times Higher Education Ranking.

The share increased to 44 % from 32%  in the past decade at USC, which requires a GPA of at least 3.4 for the lowest honor- cum laude- and to 44 % from 39 % at Lehigh where students need at least a 3.4."

Adding:

"At Wellesley College, 41 percent of this year's graduating class completed their degrees with Latin honors which means  GPA of at least 3.6"

Meanwhile, at Middlebury College  the proportion of students graduating with Latin honors was "north of  50 percent this spring" - which is ridiculous.

We are also informed "most elite schools cap the share of graduating class that can receive academic honors"  but "the caps vary widely".   For example, from 25 % at Columbia, to 60 % at Harvard. Again, this is preposterous, but at least Harvard re-calibrated from its "91 percent in 2001, highlighted in a Boston Globe article about generous honors policies".

And my essential point, reinforced in spades (ibid.):

"Academic researchers say the uptick is a sign of grade inflation, not smarter students."

Correct, because you simply cannot get that many smarter students! In many ways this farcical phenomenon resembles the claimed "Flynn effect" where most Americans are allegedly getting smarter and smarter each year as gauged by standard IQ tests. The phenomenon of incrementally increasing IQ first circulated in 1984, following a study in that year by James R. Flynn, purporting to show that citizens in advanced nations like the U.S. have experienced massive IQ gains over  time.

Thus Americans – for example – have gained 3 IQ points per decade from the early 1900s to today, as reflected in both the Stanford –Binet and Wechsler Intelligence scales. By another test’s standards (the Raven’s Progressive Matrices) – for which scores go back to people born in 1872- the gains disclosed amount to 5 IQ points per decade. So a guy with the same genetic background who was born in 1910 and had an IQ of 100 then, would attain an IQ of 160 by 1970 thanks to the Flynn effect, or equal to the (accepted) IQ of Einstein. Of course, the Flynn effect is supposed to apply to a statistical ensemble, not individuals - but I use the example of an individual measure over decades to make the point the claim is nonsense.

Even if we just stick to ensembles, it is foolish. Using the Raven’s and scored against today’s norms,  our ancestors in 1910 would have an average IQ of 70, or about moron level. By comparison, our mean IQ today – that is, disclosed within the ‘hump’ portion of a Gaussian distribution – would range from 130 to 150 depending on the test. For reference, 130 basically gets you into Mensa (accepting the top 2% of IQs) and 150 marks you as a “genius”. Are we all geniuses on our way to becoming Über-Geniuses? I don’t think so!  Neither are all the cum laude honors recipients at Harvard really cum laude quality.  They achieved that honor via a skewed grading system.

Most importantly, the ranks of neither Mensa or Intertel have increased markedly - nor have the potential members who would be accepted.  (Taking into account all those who've no interest in joining either one). Select a random sample of the populace, say 10,000 or 50,000 – and dispatch them to sit the Mensa and Intertel IQ tests. Those making the cut will still be only 2% and 1%, respectively, as has been the case for decades.  You will not find 50 percent getting through, or even 20 percent.

And you will certainly not find the mammoth proportions now receiving cum laude honors! An anomaly that suggests that either the courses taken are way too easy, or the professors - TAs are marking assignments, exams too easy.

Make no mistake, because of grade inflation, students use 'Rate My Professor' to  avoid professors who believe the grade of “C” is the average grade and who set up standards that require students to do more than show up, read a couple of hundred pages, and answer a few questions. This then translates into fewer students in the more rigorous courses that also feature more no nonsense profs.

Now, it's true some departments traditionally grade tougher than others, say like science and engineering departments. In my experience and at least through 1985, all tended to have lower overall grade averages than those in social sciences and humanities. The reason is that they adhered to rigorous Gaussian curve models for each test and homework grades.. If then 50 people took a class, say in complex algebra, and the grades ranged from a maximum of 80-85%  - which 5 got, and a minimum of 40 -45% which another 5 received, then those limits defined the extent of As and Fs, respectively.  The large central tendency bunch (say 28 in number)  that scored between 50% and 70% would ALL receive Cs,  no question. All the rest would get Bs and Ds, depending on whether they fell between 70 and 79 or below 50.


By contrast to the above, we've learned that typical Education, Early Education programs tend to have the highest course grade averages. It’s not unusual for the average grade in elementary education courses to be an A-minus, and in secondary education to be a B-plus. That means either our future teachers are brighter than a supernova—or that their profs don’t know there are more than just two letters in the alphabet. More likely, it means very sub-average or average students are taking relatively easy courses. The proof of this? Looking at years of GRE  test scores taken by Ed. majors vs. those of science majors. In year after year, Ed.  major grads' GRE averages seldom crack the 950 total for both math and verbal, while science grads routinely crack 1200-1250. Case closed!

Lastly, one has to factor in the role of parental expectations and pressure into the ongoing inflation of grades. Because every parent believes his kid will either be another Fortune 500 CEO, or a Billionaire hedge fund owner, he mandates to every university staff member that Jr. is expected to get As. Not to perform to the highest standards, but ...get those As. And woe betide the sorry butt of any prof who doesn't cooperate. He will be beseiged by angry emails or phone calls.

Administrators play into this absurd game, because they are the ones who've made the sine qua non index for their universities attaining a critical mass of students who consistently garner high enough grades to remain - to keep the money pumping in from Mommy, Daddy or more often now, the private lender. Better this critical inflated grade mass of lazy ass students than that they actual develop critical thinking skills, and oh yes...absorb some knowledge.

Sadly, there's no sign the trend is going to reverse any time soon, but there are solutions, none of which entitled students and their helicopter parents are likely to accept. The most plausible change would be to the grading scale. Janice herself has often stated how "stupid" the American grade scale is, as it is "so squeezed at the top".   I.e. "passing" only begins at a 70 percent mark with all 4 passing grades compressed into 30 points, (70- 100).

As she puts it: "Why not have at least 50 marks allocated to passing, so you fail only if you get below 50?"  At Harrison College where she attended, for example, anything below 50 % was an F, no arguments. Grades from 50-60 rated a D, from 61-70 a C, and From 71-80 a B. Marks higher than 80 earned an A but virtually no student attained a 93 % the usual starting point for an A in the U.S. The reason is that exams at HC were genuinely difficult - so much so that even the 'cream of the crop' seldom  scored even 90%.

Two sample problems from one of my own Calculus Physics final exams are given below;

1)Find the root mean square velocity of a molecule of hydrogen at a temperature of -20 C on Mars’ equator if the atmospheric pressure is 0.0056 bar. (Earth’s is 1.0 bar). Take the molecular weight of hydrogen as 2.016 g/mol.

b) A group of 4 astronauts lands on Mars with solar radiation collection material of total area 2000 m2. If the efficiency of the material is 30%, and the ambient night time temperature on Mars (for their base location at Isidis Planitia) is -40 C (10C day time), will they have adequate collecting material if the solar constant on Mars is 620 W/ m2  ? (Assume insulating material with a thermal conductivity of 0.08 W/mC, and a need to keep the inside area of their domecile at least at 10 C, requiring solar radiant energy collected of at least 1,200 W per minute for an area of 10 m x 10 m.)

c) Estimate the thickness of insulating material they're likely to need in order to make it work. Comment on whether this expedition is even feasible given the limits of their materials, and that no more than 100 3  of insulating material can be taken.

2) Examine the pendulum system shown in the diagram below.

No automatic alt text available.

Here, h2 = 1.7 m and h1 = 1.5 m. Given a pendulum length, L, write out the Lagrangian for the system, i.e. difference between its kinetic and potential energy, using: g, L, h2, h1 and the deflection angle Θ.

b) Hence or otherwise compare the velocities of the pendulum bob of mass m (= 0.1 kg) for the same values of h2, h1 if an experiment evaluating energy change is conducted on both Mars and Earth at the same time, for the same deflection angle Θ and length, L = 1.0 m. (Take the acceleration of gravity on Earth as 9.8 N/kg,and on Mars as 3.7 N/kg) Compare also the potential energy in each case. Why or why not would these be different? (Take the deflection angle to be 15 degrees in each experiment.)

Five other problems of similar difficulty were included with the student having to choose 4 of the total and complete the exam in 90 minutes.    The highest score obtained for this exam was 71%, for a class of exceptionally bright students. 

Note that the level of difficulty of the physics exams are pretty well the same as for Chemistry, Biology, English Lit, History, Math etc.  For example, two problems (of 7) for an HC Math final where 5 in all had to be answered in 90 mins.:

1)(a) The coordinates of the points L and N are (5, 6) and (8, -2), respectively.
(i)State the coordinates of the midpoint M of the line, LN.

(ii) Calculate the gradient of the line LN and propose, with justification, the equation for a parabola to which the line LN would be tangent at the point (8, -2)

(iii) Determine the equation of the straight line which is perpendicular to LN and which passes through point M.  Propose, with justification, the equation of the circle that is tangent to this line.

(b) An aircraft leaves Jamaica at 13:55 hrs. and travels to Barbados via Antigua. The average speed of the aircraft is 420 km/hr. It arrives in Antigua at 16:45 hrs. local time. Given Antigua is ONE hour AHEAD of Jamaica, compute the distance between Jamaica and Antigua.

2) (a) Using Fig. 1 and the information therein, calculate (giving reasons)


i)  The Angle MSQ

ii) The Angle RSP

iii)  The Angle SPN

b)   The matrix R =

(cos(Θ)......-sin(Θ))
(sin (Θ)......cos(Θ))

i) Determine the coordinates of the image (1, 2) under the transformation R when Θ = 90 degrees.

ii) If the point (p, 3) is on the line (L) given by: x + 2y = 5, calculate the value of p.

iii) Given the point (1,2)is on L, determine the image of L (L') of the line L under the transformation R.

iv) Write the matrix equation to represent the pair of simultaneous equations given by L and L'.

No surprise that highest honors at Harrison College were awarded for course grade averages of 70 percent or higher. (No GPA point grades were used.)  In no way and at no time did the percentage of highest honors ever exceed 1 percent in a given year. Further at no time did the equivalent of U.S. 'cum laude' honors ever exceed 5 percent.

At HC honors implied a genuine distinction - not being one of a large, similar achieving pack that benefited from grade inflation!

Thursday, January 18, 2018

Yes, "Scientist Burnout" Is A Real Condition

It is interesting that when we read of the exploits of star scientists - like recent Physics Nobel Prize winners - few think of the downsides of scientific success and achievement, namely burnout and even mental health breakdown.  But one recent Physics Today contributor who did is Andrea Welsh - in a May 2017 commentary ('It's Time for Physicists to Talk About Mental Health')  Why is there so little attention especially in the popular scientific press? Well, let's face it, speaking or writing publicly about mental health issues - including in science - has powerful stigmas attached.

Now, in the interests of full disclosure, I have never in my various tenures at different universities seen colleagues actually crack up. I have seen them under stress, especially in regard to completion of special grant projects, but not actually fall apart. What I have seen is mainly overstressed doctoral students suddenly realizing  they can no longer handle the load and just quitting - even within a year of finishing their Physics Ph.D.

My thinking here is good on them for realizing early that pursuing a high profile physics or astronomy research career may not be in their best mental health interest.   They preemptively took steps to avoid conditions that have been accurately described in a more recent (September, 2017) Physics Today Commentary, by Luigi Delle Site, who wrote:


"The highly competitive atmosphere in which scientists work leads to an unrelenting daily race to do more and to do it better. That race sets many up for burnout. Sometimes scientists reach their goals, and those successes fuel their recovery from stress. At other times, because of a lack of time and money or because of unrealistic expectations—theirs or others’—they do not meet their goals. Those cases, lacking the positive feedback of success, can, over time, sap their drive to continue.
Scientists’ jobs require that they do continue—to publish, teach, seek research funding, and participate in meetings around the world—when what they really need is time to stop and recharge. They realize that their absence from any of their career activities could lead to the loss of their reputation and standing in the community. Fear and anxiety begin to dominate their actions and thoughts and may increase to unbearable levels.
When scientists reach the end of their stress tolerance, even the minimal performance required for a small lecture or a local meeting can become a nightmare. They may feel unable to explain even a simple formula to a handful of students; struggle to find the right words; develop anxiety symptoms such as trembling, feeling faint, or experiencing fear and shame; or find that body and mind are not working together. By that time, the decrease in both happiness and the ability to function is well under way: Desperation leads to depression and isolation."


Is he serious? Yes, of course! While I've not seen assorted physics or astronomy professors outright crack in front of me, I have beheld incoherent lectures, inability to explain even basic equations or in fact, having to erase whole boards full of plasma physics equations and start over again.  While this may be allowed as an unusual "one off"  when it becomes a regular occurrence it's time for concern. Concern that the scientist in question may be in over his or her head and needs to recharge - or perhaps rethink one's professional commitments.

Two sources of added stress I've seen rear their ugly heads in the past twenty five years or so are first, teacher evaluations - especially in conjunction with ongoing grade inflation - and second the emergence of sites like "Rate My Professor" where every little dweeb can sound off on a prof he may not like, because he's too tough.

I trace most grade inflation to the idiotic teacher evaluations that emerged around the late 80s. A depressing 2013 study by Stuart Rojstaczer and Christopher Healy, and published in the prestigious Teachers College Record  found that three-fourths of all grades awarded at university level are A's or  B's.

Of course, this renders these high grades next to useless precisely because of their very commonality.  But any student with more than air between the ears can extort a high grade out of a prof by merely the veiled threat of giving him a lousy evaluation. Since these evaluations are one of the main instruments used to assess a prof  for promotion or even to remain on permanent staff (as opposed to adjunct) they are critical.



Thus, any dedicated physics or astrophysics researcher who also has to teach a certain minimum number of credit hours, will be under the gun to deliver the fake grades.  And speaking as one to whom this happened, it isn't pleasant when you have to say 'NO!' you won't be forced to deliver what a student hasn't actually earned.  (Nor will you contribute to a perversely skewed grading system that posts fraudulent achievements as actual attained standards.)

An equal source of stress for most university level research scientists is the "publish or perish" syndrome.  The author of the recent Physics Today piece cites "truly talented people ...who fail to fulfill the requirements of the modern professional researcher... and even after basically recovering 'disappear' scientifically."   By that he means they "have minimized their workload to a survival level - but the system leaves no provision to return to a full career."

No, it does not. But that in the end may be the only way for these scientists to retain their mental health. It's either sacrifice the publishing impetus, or their psyches. The publishing aspect is especially tragic given we now know only a handful of people read nearly half of all scientific papers. 

One estimate is that  1.8 million articles  are published each year, in about 28,000 journals. This elicits the question: who actually reads those papers?   According to one 2007 study, half of academic papers are read only by their authors and journal editors. This is nothing short of astounding but makes sense if one gets inside what research scientists actually do, which is to narrow their focus almost exclusively to their specific specialty areas.

When you boil it down further it means that all the pressure to publish - driving mental health issues in too many scientists - amounts to an empty exercise in scientific solipsism. It has to if so few peers are actually reading the material for which hundreds of hours of mental energy were invested.

Prof. Delle Site's prescription for the scientific burnout problem is both humane and pragmatic. He insists his solution isn't to pity those affected or remove them from all responsibility. Instead:

"I am asking that accommodation be made to allow a person with burnout to continue to have a respected position where they can fulfill academic duties according to their current capabilities."

For example, a science staff member who is now too stressed to address an audience - say for a seminar or conference - can assist in doing "behind the scenes" writing or research to prepare the lecture or presentation. In addition "the person could work remotely or take on additional tasks that do not involve the highest job stressors, i.e. tasks such as organizing seminars, correcting student exercises, or doing background research for presentations."

All of these suggestions are worthwhile and ought to be seriously considered.  The problem is whether highly competitive universities with a certain name cachet to live up to, will be so generous as to allow these options. As my dad used to say "that's where the bear sits with the buckwheat."

Let us just say, for now the jury is out.

See also: