You want to know the average height of the students at your school. Which of the
following methods should you NOT use since it will most likely give you biased results and
therefore won't be generalizable to the entire school population?
a. Measure the height of a large number of students who have been randomly selected from
introductory psychology classes at your school.
b. Measure the height of the men's basketball team at your school.
c. Measure the height of a large number of students whose names have been randomly
selected from the school's student directory.
d. Measure the height of a large number of students randomly selected from a larger group
whose college grade point average is 2.0 or above.
e. Measure the height of participants who sign up to participate in the study in return for
money.
b. Measure the height of the men's basketball team at your school.
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A man is described as lacking in empathy, exploitative of others, arrogant, exaggerated in his own sense of self-importance, and constantly overestimating his talents and power over others. This description best reflects which personality disorder?
a. borderline c. introversion b. obsessive-compulsive d. narcissistic
In order for the experimenter to be able to conclude that changes in one variable are causing the other variable to change, what must be true?
a. There should be a confounding of other variables in the situation. b. The statistical analysis must show that the results had a high probability of occurring by chance alone. c. Nothing else must change besides the manipulated variable and the measured variable. d. All of these must be true.
Which of the following statements about changes in vision in adulthood is true?
A) The lens narrows and becomes more elastic. B) Color discrimination improves. C) The muscles controlling the pupil weaken. D) Visual acuity increases.
Baby Tuan loves to stand at the window and watch cars drive past. When he wants to play with his toy cars, Tuan will make engine noises until his mother gets them out of the toy box. Piaget would say that Tuan has acquired the cognitive concept of ________.
a. skills b. reactions c. fables d. symbols