From measurement to interpretation of change in psychopathology.

The experimental literature on changes in verbal self-report, psychophyiological reactions and overt motor behavior under stress or therapy is reviewed. The concordance of changes across the systems is generally low, their order difficult to predict. The correlation of changes is interpreted to depend--besides crucial methodological issues--on the preparedness of the subject to test and to modify his propositions defining in which situations he might experience certain somato-visceral reactions and emit certain overt motor acts successfully.