. Which of these is a measure of central tendency?
a) mean
b) scatterplot
c) standard deviation
d) correlation coefficient
ANS: a
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Adolescents report that they are somewhat more likely to obtain information about sex from ____ than from ____
a. sex education classes? parents b. parents? sex education classes c. parents? friends and media d. friends and media? sex education classes or parents
When 11monthold Ethan is in a new environment, he feels free to explore. However, he periodically "checks in" with his caregiver during exploration. If his caregiver leaves the room, Ethan sometimes cries and limits his exploration. Upon his caregiver's return, Ethan gives a warm greeting? then he begins his exploration again. Generalizing from research on attachment, Ethan's attachment
would be described as a. easy. b. secure. c. disorganized. d. insecure-avoidant. e. insecure-resistant.
When Paul's friend offered to set him up on a date with Edie, he agreed until he found out she was a psychologist. He told his friend "No way, I don't want to date a crazy person; all psychologists are crazy.". Paul's statement about Edie reflects all of the following EXCEPT
a. the use of the semantic differential. b. a connotative meaning of "psychologist.". c. a denotative meaning of "psychologist.". d. a social stereotype.
A study in rats finding that greater concentrations of sucrose, an enjoyable taste for rats, led to greater concentrations of dopamine in the nucleus accumbens suggests that:
a. sucrose serves as an agonist for dopamine neurons. b. dopamine levels increase as the value of reward increases. c. an increased firing rate of GABA neurons occurred in the ventral tegmental area. d. sucrose was likely a novel stimulus.