Which of the following threats to internal validity are not controlled by the pretest-posttest
control-group design?
A) statistical regression B) history
C) maturation D) instrumentation
D
Psychology
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The absence of chromosomes or presence of extra chromosomes in a fetus usually results in __________.
A. death of the fetus B. a normal baby of either gender C. a boy D. a girl
Psychology
A newspaper article reports that crime increases each month when the moon is full. This relationship is a(n):
A. testimonial B. experiment C. survey D. correlation
Psychology
Ibogaine is derived from a shrub native to _________
a. West Africa b. Mexico c. Afghanistan d. China
Psychology
A good example of a secondary punisher is:
a. loud noise b. extremely bright lights c. physical assault d. criticism
Psychology