In a pretest posttest design, there are 15 participants who each take both the pretest and posttest. How many degrees of freedom are present?
a. 12 c. 14
b. 13 d. 15
C
There are 15 difference scores (N). df = N - 1
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Which of the following is NOT a quality that is characteristic of highly effective teams?
a. Teams have leaders who assign tasks to members. b. Team member actions are coordinated. c. Teams have collective goals, meaning that success and failure occurs at the group level. d. Team members are highly interdependent rather than self-sufficient. e. Teams tend to be well structured, in that roles, norms, and relations are stable.
Sophie is playing volleyball. As she is about to spike the ball over the net, another player on her team accidentally collides with her, and Sophie hits her head against one of the metal poles that holds up the net. Sophie loses consciousness for a few seconds and, in a daze, she walked to the bench to sit down. Although she had a headache for a couple of weeks, she suffers no other effects from
the blow. Sophie has experienced what type of brain injury? a. a contusion b. a concussion c. a laceration d. a cerebrovascular accident
In addition to nicotine, cigarettes release carcinogens. which are
a. addictive substances. b. sedative-hypnotic drugs. c. cancer-causing substances. d. respiratory irritants.
The part of the personality that seeks to balance the desires of the id with the realities of the objective, rational world is, according to Freud, the
A) unconscious. B) superego. C) preconscious. D) ego.