Psychologist's fallacy

The psychologist's fallacy is an informal fallacy that occurs when an observer assumes that his or her subjective experience reflects the true nature of an event. The fallacy was named by William James in the 19th century:

The great snare of the psychologist is the confusion of his own standpoint with that of the mental fact about which he is making his report. I shall hereafter call this the 'psychologist's fallacy' par excellence.[1]

  1. ^ William James, Principles of Psychology volume I. chapter vii. p. 196, 1890.