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In the academic years of 1962-2 and 1962-3, Richard Feynman gave his celebrated series of lectures to a cohort of undergraduate physics students at Caltech. It has been claimed, probably tongue in cheek, that over the course of the two years the undergrad students themselves abandoned the lectures, but Feynman never noticed because academic staff from across Caltech replaced them, so attendance continuously increased rather than deceasing.

The careers of all those students, now aged somewhere in their mid 70's, have all ended or are winding down. Has anyone done an analysis of performance, relative to expectations, of the careers of these fortunate students?

It is worth noting that while the lectures themselves are brilliant, the courses themselves were a mess. Leighton and Sands and the teaching assistants never knew in advance what Feynman would cover in a lecture, beyond a sentence or two of outline. Everyone was always scrambling behind the scenes, after the fact, to develop meaningful exercises and assignments for the students. How these two facts affected the careers of the students strikes me as fascinating area of study.

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    Since you're intrested in causation, you'd also need access to the subsequent career success of undergrad physics students at CalTech in nearby years, as a control group. You'd further want to access to the career success of physics majors at other top notch US schools from the chosen time periods, to control for changes in the economy and changes in government funding. – C Monsour Jun 20 at 16:41
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    @CMonsour Starting to sound like an article that could be published in a history of science journal. – Avery Jun 20 at 17:38
  • History of Science SE might also receive well on this question. – Graviton Oct 27 at 0:27
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I'm going to address your question in two parts:

1. The accuracy of the claim that attendance dropped.

2. The effect that the lectures had on the attendees.

Firstly, as you rightly hypothesised, the tale of dropping attendance was false. This stemmed from a preface to the book, written by David Goodstein and Gerry Neugebauer. They wrote that

"… as the course wore on, attendance by the registered students started dropping alarmingly. ... Many of the students dreaded the class..."

As it turned out, Goodstein was not at Caltech at that time. Neugebauer, on the other hand, was involved, but would often joke about the attendance, which could have coloured his memory.

In fact, the general experience was quite contrary. Matthew Sands, and attendee at those lectures, wrote in his book On the Origins of The Feynman Lectures on Physics, A memoir by Matthew Sands

I was sitting at the back of the hall at most of the lectures, and my memory—of course, dimmed by the years—is that perhaps twenty percent or so of the students were not bothering to attend. Such a number would not be unusual for a large lecture class, and I do not remember that anyone was "alarmed". And although there may have been some students in my recitation section who dreaded the class, most were involved and excited by the lectures—although some of them, very likely, would have dreaded the homework assignments."

If further proof is needed, see this photo of the attendees to one of his lectures. The vast majority are quite young, and according to the Caltech site only those with ties are professors. (Image from here)

enter image description here

Secondly, in response to your actual question - that of the effects that going to Feynman's lectures had on the attendees - it seems as though it wasn't necessarily a life-changing experience, though it was (at least in hindsight) enjoyable.

David Goodstein, another Caltech physicist, said long afterward, “I’ve spoken to some of those students in recent times, and in the gentle glow of dim memory, each has told me that having two years of physics from Feynman himself was the experience of a lifetime.”

As to whether or not this impacted their career in physics, as noted in the comments - that would require a full scientific study.

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    That photo link is private: "You don't have permission to access /info/FLP Classroom.JPG on this server." – Pieter Geerkens Oct 26 at 18:35
  • @PieterGeerkens How weird. It is indeed. I'll see what I can do to fix that. – Ibex Oct 27 at 9:18

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