Which of the following substances was found to induce more rapid maternal behavior?
A) plasma of female rat
B) plasma of female virgin rat
C) plasma of lactating rat
D) plasma of any rat
C
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Relative to experimental studies, the primary disadvantage of correlation studies is that
a. they are more labor-intensive b. they do not allow one to determine causality. c. the results are more difficult to understand. d. the choice of variables that can be studied is limited.
Research on gender and helping indicates that ____
a. regardless of whether helpers are male or female, females are more likely to receive help than males b. when helpers are male, females are more likely to receive help than males; when helpers are female, females and males are equally likely to receive help c. when helpers are male, females are more likely to receive help than males; when helpers are female, males are more likely to receive help d. when helpers are male, females and males are equally likely to receive help; when helpers are female, females are more likely to receive help than males
As the night progresses:
a. the interval between successive REM states becomes longer b. the interval between successive REM states becomes shorter c. the interval between successive REM states stays the same d. REM sleep eventually disappears from the sleep cycle
While girls are more likely to be diagnosed with autistic disorder, boys are more likely to suffer from problems with hyperactivity
Indicate whether this statement is true or false.