One explanation for why aggression leads to more aggression is that it is reinforced by the cathartic release of tension

Dr. Harem is studying the effects of drugs on memory. He gives his participants several

lists of nonsense words. After the participants study a list for five minutes, he measures their memory ability by asking them to write down all the nonsense words that they can recall in two minutes. Which of the following statements about this study is true? a. The independent variable is the number of words that subjects can recall. b. Dr. Harem's study has one control group and two experimental groups. c. The control group in this study is given lists of nonsense words to memorize. d. Dr. Harem has operationally defined the variable of memory ability. e. The experiment is confounded by the use of nonsense words.

When Hailey joined a school service organization, it gave a new focus to her desire to help others. Her enthusiasm helped make the organization more lively and attractive to other students, which made her enjoy it even more. The relationship between her a

A) a dynamic person-context interaction. B) an adaptive developmental regulation. C) a positive feedback loop. D) All of the above.