Investigations of interracial adoption and IQ have revealed that African American children reared in economically advantaged White households showed an overall increase in IQ relative to the national average for African American children. This finding supports the proposal that observed differences in IQ scores between various racial and ethnic groups:
a. result entirely from genetic factors
b. result entirely from biases that exist in current intelligence testing procedures
c. may result from environmental differences between the groups
d. are a result of poor parenting practices
C
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Which one of the following statements is always true when an interaction exists between the variables in a factorial design?
a. the effect of one independent variable depends, to some extent, on which level of the second variable is considered b. One independent variable has an effect regardless of the level of a second variable c. there is as least one significant main effect d. all of these
If the points on a scatterplot are clustered in a pattern that extends from the lower left to the upper right, this would suggest that the two variables depicted are:
a. normally distributed. b. positively correlated. c. regressing toward the average. d. negatively correlated.
George Miller found that the average person is able to keep about _______ digits in mind at a time
a. twelve c. seven b. ten d. three
A child is willing to explore the environment and shows positive emotions to things that she/he does not know. This child is most likely to have:
a. ambivalent attachment. c. secure attachment. b. avoidant attachment. d. disorganized attachment.