Amniocentesis is encouraged for
a. women over the age of 25.
b. women carrying the children of aging fathers.
c. women, or their partners, who have family histories of monozygotic or dizygotic twins.
d. women who are carrying their first pregnancy.
b
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A sample that includes individuals with known qualifications or experiences is known as a(n) ____ sample
a. quota b. snowball c. heterogeneity d. expert
In single-subject research, the effect of the independent variable on the dependent variable can be assessed through:
a. intrasubject replication. b. multiple dependent variables. c. statistical procedures. d. averaging results from many subjects.
The emergence of fantasy play and the use of symbolic gestures are hallmarks of the ______ stage of cognitive development
a. concrete-operational c. sensory-motor b. preoperational d. formal-operational
A credible source can enhance message processing and acceptance.
a. true b. false