The role of contingency in psychology is often overlooked by laymen and even clinical psychology practitioners. It is difficult to realize that part of the change in behavior is caused by random factors, so psychologists should not pretend to be able to predict each case. Action. Psychological predictions should be probabilistic, meaning that they can make psychological predictions at the individual level, which is a common mistake made by clinical psychologists. What does this text mean? ['Human behavioral changes are accidental.', 'Psychological predictions are overall predictions of behavior.', 'The accuracy of human behavior prediction is not high at present.', 'Clinical psychologists are better at making psychological predictions about individuals.']