According to the Rescorla-Wagner theory of conditioning, blocking occurs because
A) ?the US has already taken up most of the available associative strength.
B) ?familiar stimuli are more difficult to condition.
C) ?the CS gathers more associative strength than the US.
D) ?one CS has already taken up the maximum associative value.
D
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______ samples are more likely to be representative of the population.
A. Probability B. Random C. Quota D. Convenience
In the following formula, 
, ______ is the expected frequencies.
A. fcolumn B. frow C. fpopulation D. fExpected
Arnold is a highly educated, intelligent young man with a less than pleasing disposition. As such, he is most likely to be viewed as an excellent potential mate a. in every culture in the world
b. nowhere in the world. c. in some cultures but not in other cultures. d. only in the United States.
Approximately what percent of babies in the United States are born prematurely?
A) 6 B) 12 C) 21 D) 28