IQ Scores Should Be Corrected for the Flynn Effect in High-Stakes Decisions

Autor/inn/en	Fletcher, Jack M.; Stuebing, Karla K.; Hughes, Lisa C.
Titel	IQ Scores Should Be Corrected for the Flynn Effect in High-Stakes Decisions
Quelle	In: Journal of Psychoeducational Assessment, 28 (2010) 5, S.469-473 (5 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0734-2829
DOI	10.1177/0734282910373341
Schlagwörter	Stellungnahme; Testing; Mental Retardation; Validity; Intelligence Quotient; Weighted Scores; Psychometrics; Intelligence Tests; Court Litigation; Criminals; Standards; Test Validity; Meta Analysis; Error of Measurement; Wechsler Adult Intelligence Scale; Wechsler Intelligence Scale for Children + Suchen Sie Ihr Suchwort? Testdurchführung; Testen; Geistige Behinderung; Gültigkeit; Intelligenzquotient; Psychometry; Psychometrie; Intelligence test; Intelligenztest; Rechtsstreit; Straftäter; Standard; Testvalidität; Meta-analysis; Metaanalyse; Messfehler
Abstract	IQ test scores should be corrected for high stakes decisions that employ these assessments, including capital offense cases. If scores are not corrected, then diagnostic standards must change with each generation. Arguments against corrections, based on standards of practice, information present and absent in test manuals, and related issues, ignore expert consensus about the assessment of intellectual disabilities and the acceptance of the Flynn effect in the field. Most psychometric concerns about correction are based on validity studies with small subgroups and do not reflect sufficient effort to estimate the precision of the Flynn estimate. We computed a confidence interval for the Wechsler PIQ across four validity studies that shows a SEM of about 1 around a mean of about 3 points per decade. A meta-analytic weighted mean of the 14 studies in Flynn (2009) is 2.80 (2.50, 3.09), close to Flynn's (2009) unweighted average (2.99). More psychometric research would be helpful, but this level of precision supports the Flynn adjustment of 3 points per decade. (Contains 2 tables.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10