Sally turns in her exam, and no longer feels the pressure of test-taking. She is more likely to do this again next time. This example best illustrates the concept of

According to Martin Seligman, people who are depressed

a. have low levels of the neurotransmitter serotonin. b. are in a state of learned helplessness. c. believe they are in control of their own lives. d. are more susceptible to stress in their lives.

To increase the efficiency of the conduction of neural electrical information, __________ of

individual axons occurs throughout childhood and adolescence. Fill in the blanks with correct word