Suppose identical twins raised apart have a correlation of .40 on a measure of some aspect of personality, and identical twins raised together have a correlation of .60 on this same measure. From these data, what can we logically conclude about this trait?
a. Nonshared environment has an impact because, even raised together, the identical twins do not show a perfect 1.00 correlation.
b. Nonshared environment has no impact because the identical twins raised apart have a lower correlation than the identical twins raised together.
c. Shared environment has no impact because identical twins raised apart have a correlation lower than 1.00.
d. Shared environment has an impact because identical twins raised apart have a correlation of .40.
a
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Which of the following is a true statement?
a. There is a strong negative correlation between the amount of empathy the therapist establishes and the overall effectiveness of treatment. b. There is a strong positive correlation between the amount of empathy the therapist establishes and the overall effectiveness of treatment. c. There is a weak positive correlation between the amount of empathy the therapist establishes and the overall effectiveness of treatment. d. There is no correlation between the amount of empathy the therapist establishes and the overall effectiveness of treatment.
From an evolutionary perspective, precise hand control was probably the main advantage derived from
a. upright walking. c. the transition from hunters to gatherers. b. increased brain size. d. constant movement from place to place.