AN INVESTIGATION OF Gf-Gc THEORY IN THE OLDER ADULT POPULATION: JOINT FACTOR ANALYSIS OF THE WOODCOCK-JOHNSON-REVISED AND THE DETROIT TEST OF LEARNING APTITUDE-ADULT

2001 ◽  
Vol 88 (3) ◽  
pp. 1161
Author(s):  
JOSEPH A. BUCKHALT
2001 ◽  
Vol 88 (3_suppl) ◽  
pp. 1161-1170 ◽  
Author(s):  
Joseph A. Buckhalt ◽  
Ron L. McGhee ◽  
David J. Ehrler

Researchers and clinicians are increasingly interested in the structure of intelligence among older adults. A joint factor analysis was conducted for 27 subtests of the Woodcock-Johnson Psycho-Educational Battery–Revised and the Detroit Tests of Learning Aptitude–Adult for a sample of 50 persons ranging in age from 55 to 84 years ( M = 65.16 yr.). The results provide evidence for the latent factors specified by Gf-Gc theory in older adults, indicate which Gf-Gc factors are measured by subtests of the two batteries, and illustrate the necessity of cross-battery assessment to identify the full complement of Gf-Gc factors.


2021 ◽  
Vol 9 ◽  
Author(s):  
Hamid Sharif Nia ◽  
Long She ◽  
Ratneswary Rasiah ◽  
Fatemeh Khoshnavay Fomani ◽  
Omolhoda Kaveh ◽  
...  

Background: Studies have revealed an increase in discrimination, neglect, and abuse among the older adult population during this period. This study assessed the validity and reliability of the Persian version of the ageism survey instrument tested on a sample of the Iranian older adult population during coronavirus disease (COVID-19) pandemic. An important move in counteracting ageism is to classify the ageism scale comprehensively by employing adequate psychometrics.Methods: The Persian version of the ageism scale was developed using a two-step procedure. The first step involved translating and revising the original scale to develop a Persian version of the ageism scale. The second step involved assessing the psychometric features of the newly adapted scale using construct validity through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) and thereafter assessing the reliability through the average inter-item correlation (AIC), Cronbach's alpha. The sample consisted of 400 older adults (age 65 and older), who were recruited through online data collection, with samples for EFA and CFA randomly selected from the total samples.Results: The Persian version of the ageism survey has three factors: age-related deprivation with five items, dignity with three items, and employment with three items; all of which explained 57.02% of the total variance. The outcome of the EFA was verified by the CFA, with internal consistency reliability being excellent (Cronbach's alpha was 0.725, 0.698, and 0.708 for the three factors).Conclusion: This study specifically offers a restructured three factors Persian version of the ageism survey for Iranian older adults with acceptable construct validity and reliability.


1991 ◽  
Vol 19 (2) ◽  
pp. 120-124 ◽  
Author(s):  
David Locker ◽  
Andree Liddell ◽  
David Burman

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