The hormone __________ has been found to be elevated in most patients hospitalized with major depressive disorder

In a classic experiment, Tolman exposed a group of rats to a maze for 11 days before he introduced a food reward. These rats outperformed rats that had been given daily food rewards. This demonstrates _____

a) latent learning. b) classical conditioning. c) operant conditioning. d) observational learning.

By the end of the preschool period, the ________ has grown significantly because it becomes considerably thicker with individual fibers that help coordinate brain functioning between the two hemispheres

a) cerebral cortex b) frontal lobe c) hypothalamus d) corpus callosum