According to the text, at about what age do children begin to show a fascination with their genital regions of their bodies?
a. age 2
b. age 3-4
c. age 5-6
d. age 7-8
b
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The heritability of IQ is about 10%.
Answer the following statement true (T) or false (F)
What is one impediment to the regeneration of axons in the mammalian central nervous system?
a. Inhibitory chemicals secreted by the damaged portion of the axon b. Bacterial infections caused by the decaying tissue c. Glia releasing chemicals that inhibit axon growth d. Inhibitory messages sent from the cell nucleus when an axon is damaged
The painkilling effect of placebos and acupuncture as well as the "runner's high" and the euphoria associated with childbirth are explained by the release of endorphins
Indicate whether the statement is true or false
As the mean IQ of a nation increases, the mean level of national happiness:
A) decreases. B) increases. C) remains unchanged, but the standard deviation in happiness decreases. D) remains unchanged, but the standard deviation in happiness increases.