The average age for the onset of ODD is about age

Which of the following is NOT an example of operant behavior?

a) a child doing her homework after she receives her teacher's approval for her behavior b) a rat pressing a bar after receiving food for this behavior c) a dog blinking its eyes after a flash of light is presented d) a rat pressing a bar after avoiding a shock for this behavior

To explain the human universality and variability of emotions, Ekman and his associates __________

a) developed a concept of "display rules," which are rules for emotional expression. b) developed an interobserver system to make sure that observers defined expressions reliably. c) interviewed all participants in order to assess unexpressed feelings and motivations. d) monitored the brain waves of participants to determine which hemisphere had higher activation.