The American Psychological Association (APA) Dictionary of Psychology (2007) defines the Flynn Effect as:
"the gradual rise of IQ level that has been observed since the time when records of IQs first were kept. Although the average IQ remains 100 due to periodic renorming o f IQ tests, RAW SCORES have been rising. These increases have been roughly 9 points per generation (i.e., 20 years). The gains have been unequally distributed across the different abilities, with FLULID ABILITIES show substantially greater gains than CRYSTALLIZED ABILITIES. [James Flynn (1934-- ), New Zealond Philospher who first docuented its occurrence]." (p.382)
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