An independent-measures study produces sample means of M1 = 20 and M2 = 17 . If both samples have n = 18 scores and Cohen's d = 0.50, what is the value for the pooled variance?
a. 2 c. 6
b. 4 d. 36
D
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The perceived sound differences between sounds with the same pitch but possessing different higher harmonics is known as ______.
A. stapes B. amplitude C. decibel D. timbre
Neural circuits for the articulation of words are most likely to be located in
a. the auditory cortex. b. the motor cortex. c. the parietal cortex. d. Wernicke's area. e. Broca's area.
Psychologist Daniel Goleman has advocated teaching emotional literacy in schools to promote self-awareness, self-regulation, and social skills. This program is referred to as
a. academic readiness program. c. social coaching. b. peer counseling. d. emotional intelligence.
Becky wants to see if there is an effect of “senioritis” on college students’ grades. She asks psychology students in each year of school (freshman, sophomore, junior, or senior) to report their fall semester GPA. Which of the following would be the best way to illustrate Becky’s results?
A. A scatterplot, in order to observe the relationship between the two variables B. A normal curve, because the scores should be normally distributed across all groups C. A histogram, in case the data are not normally distributed and it’s better to look at the median than the mean D. A frequency distribution, in order to observe patterns across different groups