Which schools of psychology are the most and the least likely to study thoughts and mental processes?

What is the criteria for a PTSD diagnosis?

What will be an ideal response?

According to the article Gimme the Ball concerning the development of object permanence, in the main study by Goubet & Clifton, overall, the infants reached ______ for the ball in the light conditions as compared to the dark conditions:

(a) much more (b) much less (c) about the same amount