Extinction occurs when a ______ is no longer paired with a _______
A) UR; CR
B) CS; UR
C) US; UR
D) CS; US
Ans: D) CS; US
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If your circadian rhythm becomes out of step with clock time when you travel, you experience a phenomenon known as:
A. sleep spindles B. activation-synthesis C. paradoxical sleep D. jet lag
Higher knowledge levels about HIV/AIDS are consistently strong predictors of behavior changes and the practice of safer sex among U.S. college students
a. True b. False Indicate whether the statement is true or false
Following mitosis,
A) each new body cell contains unique genetic information. B) cells divide in half to form the fertilized ovum. C) each cell loses its cytoplasm. D) each new body cell contains the same number of chromosomes.
Maccoby and Jacklin (1974) concluded that boys and girls differed in their abilities in what areas?
a. Girls have greater verbal abilities. b. Girls have lesser verbal abilities. c. Girls have greater mathematical abilities. d. Girls have greater visual-spatial abilities.