n its early years, psychology focused on the study of , but from the 1920s into the 1960s, American psychologists emphasized the study of . Group of answer choices

mental processes

observable behavior

Explanation:

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.

the answer is tom watson. tom watson created this epitaph because he wanted to increase the sympathy felt by people towards the murder of mary phagan.