Wilhelm wundt felt that the object of psychology was the study of the mind as a natural event and that the best way to approach the study of psychology was to

answer; ///attempts to change more than once behavior at the same time;

answer; /// working class;

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.

answer; in the 1950s;