Chapter

Methodological Studies

K. Warner Schaie

in Developmental Influences on Adult Intelligence

Published in print February 2005 | ISBN: 9780195156737
Published online September 2007 | e-ISBN: 9780199786817 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195156737.003.0008
 Methodological Studies

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This chapter describes some of the methodological studies that were conducted as part of the Seattle Longitudinal Study. The discussion mentions the shift from a sampling-without-replacement paradigm to one that involved sampling with replacement, as well as the issue of the aging of tests and results from an investigation designed to determine whether switching to more recently constructed tests would be appropriate in the context of the longitudinal study (1975 collateral study). The possible effect of repeated measurement designs in understating cognitive decline is considered and analyses that adjust for practice effects are presented. The issue of structural equivalence across cohorts, age, time, and gender is also explored.

Keywords: Seattle Longitudinal Study; methodological studies; intellectual development; sampling-without-replacement paradigm; sampling; cognitive decline; practice effects; structural equivalence

Chapter.  12640 words.  Illustrated.

Subjects: Developmental Psychology

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