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Direct linkWeiss, Lawrence G. – Journal of Psychoeducational Assessment, 2010
Flynn has proposed a grand integrative theory, which he calls "scientific spectacles," to explain the phenomenon of rising IQ scores across multiple decades known as the Flynn effect (FE). In his theory, he purports that modern society has placed increasing value and emphasis on the application and education of scientific…
Descriptors: Intelligence Tests, Scores, Academic Achievement, Time Perspective
Zhou, 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
