In 1993, the Environmental Protection Agency declared that
A. sidestream smoke is lower in nitrosamines.
B. secondhand smoke is a known carcinogen that increases lung cancer risk.
C. smoking would be banned in all federal facilities.
D. cigarette smoking might be a cause of heart disease.
B
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Findings of a correlation between attachment security in infancy and toddlerhood and later externalizing and internalizing problems suggest that infants with insecure attachments are more likely than those with secure attachments to be __________.
A. socially competent with peers in childhood B. cooperative with parents in adolescence C. anxious and aggressive in childhood D. anxious and depressed, but only in infancy
In middle childhood, children are most likely to play in mixed-gender groups
a. True b. False Indicate whether the statement is true or false
To determine the overall means for a level of a(n) ______, the researcher averages the means for the cells in the columns and the rows.
A. dependent variable B. main effect C. independent variable D. interaction effect
In the "pull on a toy string" experiment, Chen and colleagues showed that analogical reasoning
a. is difficult for adults as well as for children. b. is done better by grade-schoolers than by adults. c. begins to be mastered during adolescence. d. is within the capabilities of one-year-old babies.