When individuals in one group of a nonequivalent control group design experience natural changes at a faster rate than individuals in the other group, there is danger of a threat to internal validity called
A. additive effects of selection and history.
B. additive effects of selection and maturation.
C. additive effects of selection and instrumentation.
D. differential statistical regression.
B. additive effects of selection and maturation.
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Prior to sexual differentiation between the 7th and 16th weeks of the prenatal period, male and female external genitals __________.
A. are not present B. are identical C. are different enough to tell them apart visually D. consist of one uniform bump that does not even remotely resemble mature genitals
Josie listened to a speech on the radio advocating the increased use of automobiles that are not reliant on fossil fuels. One would expect the sleeper effect to be greatest if Josie found out about the background of the speaker ____ the speech and was asked about his views about the issue ____
a. before? that same day b. after? that same day c. before? a few weeks later d. after? a few weeks later
One sample has a variance of s2= 10 and a second sample has a variance of s2= 6 . Which of the following most accurately describes the pooled variance for the two samples?
a. Closer to 6 than to 10 c. Somewhere between 6 and 10 b. Closer to 10 than to 6 d. Around 16
The most widely used personality inventory is the
A) Sixteen Personality Factor Questionnaire. B) California Test of Personality. C) Minnesota Multiphasic Personality Inventory. D) Edwards Personal Preference Schedule.