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Direct linkZhou, Xiaobin; Zhu, Jianjun; Weiss, Lawrence G. – Journal of Psychoeducational Assessment, 2010
This study investigated the Wechsler Performance IQ (PIQ) or Perceptual Reasoning Index (PRI)/ Perceptual Organization Index (POI) change over time and its relation to ability levels. PIQ or PRI/ POI was analyzed because of the known sensitivity of nonverbal scales to the Flynn effect. Scores were analyzed using two methods. First, analysis of…
Descriptors: Intelligence Quotient, Intelligence Tests, Age Differences, Change
