[jcfrei]

Why do you think the results are quantitatively weak? My first critique is just the small sample size with ~60 students and the tests, which appear to be different between the students.

[lomnakkus]

The OP alluded to p-values, and I think this may be relevant:

   https://www.youtube.com/watch?v=5OL1RqHrZQ8

(In short: p-values are pretty much useless as an indicator of "this experiment can be reproduced".)

Not that this necessarily refutes the original article, I just thought it might be relevant to discussion.

[rhiever]

If you look in the methods, the experiment has been successfully reproduced twice after the initial trial with distinct cohorts of students.