The human characteristic that has been most investigated for its genetic basis is:

Since 1950, interest in psychological explanations for schizophrenia, as opposed to genetic and biological explanations have:

A) decreased, then increased. B) increased, then decreased. C) decreased steadily. D) stayed the same.

Contrary to Pavlov's procedure, Thorndike presented the eliciting stimulus after

a __________ rather than after the __________ . Fill in the blanks with correct word