When looking at the unusual protrusion sticking out of a newborn's head, Dr. Chung says, "The growth is due to some sudden change in the structure of the genes that was not passed on by the parents." Dr. Chung suspects that the growth is due to
A. mutation
B. epigenetics
C. a recessive gene
D. codominance
Answer: A
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Prevention efforts for maltreatment have been shown to be most effective __________.
A. with older children B. with adolescents C. with younger children D. when school starts, because teachers can spot maltreated children
Strayer and Johnston were investigating the link between cell phone use and the ability to react to environmental stimuli. While the participants tracked a moving target using a joystick, they were required to press a button each time a red light flashed at random points on a computer screen. While completing the task, one group used a hand-held cell phone to carry on a conversation, one group
used a hands-free cell phone, and one group was not engaged in any conversation. The researchers measured the time that elapsed between the appearance of the red light and the button press. The results from this study suggested that compared to the group that was not engaged in any conversation, people engaged in a cell phone conversation: a. detected the red light each time it was present, but were slower to react to the red light b. failed to detect the red light more often, but had equally quick reaction times when the red light was detected c. only showed slower reactions times if they were using a hand-held cell phone d. failed to detect the red light more often, and were slower to react to the red light when it was detected
In all cases, the ______ distribution will be 0.
A. mean of the z-score B. mean of the z-test C. mean of the sample D. mean of the population
Chodorow's theory of development for boys and girls states that:
a. boys, but not girls, see their mothers initially as primary sex objects b. girls form a more intense attachment to their mothers than do boys c. boys identify more strongly with their mothers than do girls d. boys and girls are equally likely to adopt the personal traits of their mothers