B.F. Skinner believed behavior is modified by:

Can negative reinforcers be punishers?

In a certain experiment, a research subject is supposed to hear the sound of a bell. The sound of the bell that the research subject can hear in 50 percent the trials is his _______. 

The suprachiasmatic nucleus influences the release of melatonin by its effect on the:

Those whose corpus callosum is surgically severed are said to be patients with

When Rodney first began drinking alcohol, he became lightheaded after drinking a single beer. Now he must drink three beers before feeling lightheaded. This is called:

Which of the following statements is true of the functions of sleep?

Racial and ethnic stereotypes can sometimes bias our perceptions of others’ behaviors. This best illustrates the impact of:

Michael, a seven-year-old boy, fell from his bicycle onto a stone pavement on the road. He was rushed to a hospital immediately. However, he could neither open his eyes nor respond to stimuli. Michael’s loss of consciousness was most likely due to:

Although a carpenter might perceive a briefly viewed object as a screwdriver, a police officer might perceive the same object as a weapon. This illustrates that perception is guided by