In Caspi's assessment of the relationship among an enzyme called monoamine oxidase (MAOA) activity, childhood rearing environment, and antisocial behavior in adolescent boys, which of the following showed the highest level of antisocial behavior?
a. boys who experienced severe maltreatment and had low MAOA activity
b. boys who experienced severe maltreatment and had high MAOA activity
c. boys who probably experienced maltreatment and had high MAOA activity
d. boys who probably experienced maltreatment and had low MAOA activity
A
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A sample of n = 8 scores has a mean of M = 10 . After one score is removed from the sample, the mean for the remaining score is found to be M = 11 . What was the score that was removed?
a. X = 3 b. X = 7 c. X = 8 d. Cannot be determined from the information provided
The human body is approximately ______ water.
A. 25% B. 50% C. 60% D. 70%
By what age does the complete myelination of the reticular formation usually occur?
a) the mid 20s b) the mid 30s c) the mid 40s d) The reticular formation contains only demyelinated neurons, so there is no complete myelination of this brain area.
Chapter 6 Refer to the research study described on page 157 - 158 of your textbook to answer the following question. Can you think of an alternative explanation for the results of the study beyond the explanation offered by the researchers? What type of study might allow the alternative explanation to be ruled out?
What will be an ideal response?