When you look at the drawing below, your brain fills in the gaps so that you perceive a complete form—in this case, a square. This occurs due to the Gestalt principle of _______________

American psychologists did not study consciousness for many decades because of the influence of _____

a) behaviorism. b) psychoanalysis. c) humanistic psychology. d) dualism.

Studies that estimate the heritability of a trait by breeding animals with other animals that have the same trait are called ______ studies

a. selection c. family b. strain d. twin