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
d. +.5
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Which of the following is NOT a reason noted by researchers as to why boys do better than girls in math?
a) Girls think math is not important. b) parental expectations c) social influences d) Girls believe they are more talented than boys.
Drugs were not widely used to treat psychological disorders until the ________
a. 1930s b. 1970s c. 1950s d. 1990s