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Mahmoud Completed His First IQ Test on the WPPSI-IV Scale

Question 109

Multiple Choice

Mahmoud completed his first IQ test on the WPPSI-IV scale at age 7.This score had a correlation of +.76 with his IQ score at age 9.How will the correlation of Mahmoud's IQ score at age 23 change in relation to his score at age 7?


A) It will increase by .15
B) It will decrease by .30
C) It will decrease by .20
D) It will decrease by .35

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