In accordance with the text, we would expect the correlation between smoking and lung cancer to be _____, whereas we would expect the correlation between mountain elevation and temperature to be _____
a. curvilinear; negative
b. positive; negative
c. negative; positive
d. positive; curvilinear
b
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Subject variables are characterized by all of the following except that they
a. are neither dependent nor truly independent variables. b. cannot be manipulated or randomly assigned. c. may include gender and ethnicity of participants. d. are essential for field experiments.
Kwan checks his email for new messages several times during the day. He realizes that because emails are sent on a ________________ schedule, checking his email more frequently will not increase the number of new emails he receives in a day
Furthermore, he knows that he cannot predict when people will email him, but if an email has been sent to him, he will receive it the next time he checks. A) fixed-ratio B) fixed-interval C) variable-ratio D) variable-interval
What have researchers found in measuring brain activity in toddlers?
a. sharp decrease in cortical activity from 18 to 24 months b. steady decline in cortical activity after 12 months c. steady increase in cortical activity after 12 months d. sharp increase in cortical activity from 18 to 24 months
Chronic use of alcohol can result in decreased blood flow and metabolic rates in brain regions
Indicate whether the statement is true or false