How would the psychometric curve to these stimuli differ for you (say, an average American) and for X-15? Draw out the psychometric curves for you (in red) and X-15 (in blue) To hearing pa vs Ba
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Refer to the Teaching Psychology (May 1998 ) study of how external clues influence performance, presented in Exercise 2.128 (p. 110). Recall that two different forms of a midterm psychology examination were given, one printed on blue paper and the other on red paper. Grading only the difficult questions, the researchers found that scores on the blue exam had a distribution with a mean of $53 \%$ and a standard deviation of $15 \%,$ while scores on the red exam had a distribution with a mean of $39 \%$ and a standard deviation of $12 \%$. Assuming that both distributions are approximately normal, on which exam is a student more likely to score below $20 \%$ on the difficult questions, the blue one or the red one? (Compare your answer with that of Exercise 2.128 c.)
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