Which of the following operational definitions of a variable would suffer from an effective range problem?
A) a standard IQ test administered to high school seniors in a study of the relationship of intelligence to dating patterns
B) a very difficult mathematics reasoning test given to a group of college mathematics majors in a study to determine the effects of high anxiety on test performance
C) a standard bathroom scale to measure the weight of chickens in a study to determine how chicken size affects pecking order
D) a wristwatch with a second hand to measure the time it takes students to solve 10 anagram problems in a study of the effects of noise on problem-solving speed
Answer: C
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