Why are field studies often conducted by psychologists?
A) they are less expensive
B) they are less time consuming
C) they enhance internal validity
D) they enhance external validity
D
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When we are considering both possible directions of the difference between means in the hypothesis, we call this a(n) ______.
A. null hypothesis B. one-tailed hypothesis C. alternative hypothesis D. two-tailed hypothesis
The highest unemployment rate for American youths is among:
A) African American teens who are not in school. B) African American teens, whether they are in school or not. C) Hispanic American teens who are not in school. D) Hispanic American teens, whether they are in school or not.
According to set-point theory, the size of fat cells is determined by
a. heredity. b. eating habits during adolescence and adulthood. c. diet during the first two years of life. d. the mother's diet before birth of the child.
Complete the following analogy: Vision is to photoreceptors as sound is to ________.
A. hair cells B. semicircular canals C. oval window D. tympanic membrane