At about what age does infants' smiling indicate feelings of happiness?
a. at birth c. at 3 months
b. at 1 month d. at 6 months
C
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Attempts to understand the biological basis of depression has linked it to imbalances in
a. serotonin and dopamine. b. dopamine and norepinephrine. c. norepinephrine and serotonin. d. serotonin and acetylcholine. e. epinephrine and dopamine.
In a linear relationship, as the X scores increase, the Y scores change
a. in only one direction. b. only in the negative direction. c. only in the positive direction. d. in the positive and then in the negative direction.
Kremsa has just finished completing a class project in which she investigated the
relationship between hours spent studying for an examination and performance on the exam. She simply asked students how many hours they studied for their last psychology exam and what scores they earned. She calculated a correlation coefficient and found that the fewer hours students studied for their exams, the lower their scores were. Which of the correlation coefficients below best represents Kremsa's findings? a. -.7 b. -.3 c. +1.2 d. +.5 e. 0
The term "mashing" refers to what psychologists call ______
a. pedophilia c. frotteurism b. transvestic fetishism d. sadism