Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

Click here to sign up for SAGE Journal Email Alerts today!

Sign In to gain access to subscriptions and/or personal tools.
Journal of Psychoeducational Assessment
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Lee, H. F.
Right arrow Articles by Patterson, C. A.
Right arrow Search for Related Content
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Cognitive Differences for Ages 16 to 89 Years (Canadian WAIS-III)

Curvilinear With Flynn and Processing Speed Corrections

Hoyee Flora Lee

Graduate School of Psychology, Fuller Theological Seminary

Richard L. Gorsuch

Graduate School of Psychology, Fuller Theological Seminary, rgorsuch{at}fuller.edu

Donald H. Saklofske

University of Calgary

Colleen A. Patterson

Dufferin-Peel Catholic District School Board

Adult cognitive age differences in the Wechsler Adult Intelligence Scale—III Canadian normative data were curvilinear for most scales and for the Verbal Comprehension (VC), Perceptual Organization (PO), and Working Memory (WM) factors. These showed stable or increasing scores in early adulthood followed by decreasing scores, necessitating a nonlinear (continuous parameter estimation) approach to modeling adult age differences. Means were as high as or higher than the 18-year-olds until 60 years for PO and 70 years for WM and VC. As the means showed no interpretable differences across 20 to 30 years of adult cohorts, no one year can be identified as the highest scoring. "What If" analyses correcting for possible Flynn effects and for the hypothesis that changes in Processing Speed may underlie some of the age differences suggest that further testing of these two effects is a necessary prerequisite to advancing our understanding of adult age differences.

Key Words: intelligence • WAIS-III • aging • Flynn effect • Processing Speed

Journal of Psychoeducational Assessment, Vol. 26, No. 4, 382-394 (2008)
DOI: 10.1177/0734282908323628
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:


Home page
 Canadian Journal of School PsychologyHome page
A. M. Callens, T. B. Atchison, and R. R. Engler
Increased Specificity of Wechsler Adult Intelligence Scale--Third Edition Matrix Reasoning Test Instructions and Time Limits
Canadian Journal of School Psychology, March 1, 2009; 24(1): 94 - 98.
[Abstract] [PDF]