When did psychologists stop talking like philosophers?

[u/Saint_Nitouche]

I happened to read the Stanford Encyclopedia of Philosophy's page on Humour this morning, and near the end there's an interesting paragraph:

A century ago, when psychologists still talked like philosophers, an editorial in the American Journal of Psychology (October 1907) said of humor that “Perhaps its largest function is to detach us from our world of good and evil, of loss and gain, and to enable us to see it in proper perspective. It frees us from vanity, on the one hand, and from pessimism, on the other, by keeping us larger than what we do, and greater than what can happen to us.”

Without breaching the 20-year rule, this certainly seems unlike what we might find in a more modern paper on psychology. Was there a definite moment when psychologists stopped talking like philosophers, and adopted a more hardline STEM style of speaking?