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Developmental Influences on Adult IntelligenceThe Seattle longitudinal study$
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K. Warner Schaie

Print publication date: 2005

Print ISBN-13: 9780195156737

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780195156737.001.0001

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Methodological Studies

Methodological Studies

Chapter:
(p.187) chapter eight Methodological Studies
Source:
Developmental Influences on Adult Intelligence
Author(s):

K. Warner Schaie

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195156737.003.0008

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

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