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Principal Component Analysis of Working Memory Variables during Child and Adolescent Development

Published online by Cambridge University Press:  03 October 2016

Catarina I. Barriga-Paulino ,
Elena I. Rodríguez-Martínez ,
María Ángeles Rojas-Benjumea  and
Carlos M. Gómez
Catarina I. Barriga-Paulino
Affiliation:
Universidad de Sevilla (Spain)
Elena I. Rodríguez-Martínez
Affiliation:
Universidad de Sevilla (Spain)
María Ángeles Rojas-Benjumea
Affiliation:
Universidad de Sevilla (Spain)
Carlos M. Gómez*
Affiliation:
Universidad de Sevilla (Spain)
*
*Correspondence concerning this article should be addressed to Carlos M. Gómez. Departamento de Psicología Experimental. Universidad de Sevilla. C/ Camilo Jose Cela, s/n. 41018. Universidad de Sevilla. Sevilla (Spain). Phone: 34–954557800. E-mail: cgomez@us.es
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Abstract

Correlation and Principal Component Analysis (PCA) of behavioral measures from two experimental tasks (Delayed Match-to-Sample and Oddball), and standard scores from a neuropsychological test battery (Working Memory Test Battery for Children) was performed on data from participants between 6–18 years old. The correlation analysis (p < .05) results showed a common maturational trend in working memory performance between these two types of tasks. Applying PCA (Eigenvalues > 1), the scores of the first extracted component were significantly correlated (p < .05) to most behavioral measures, suggesting some commonalities of the processes of age-related changes in the measured variables. The results suggest that this first component would be related to age but also to individual differences during the cognitive maturation process across childhood and adolescence stages. The fourth component would represent the speed-accuracy trade-off phenomenon as it presents loading components with different signs for reaction times and errors.

Keywords

child developmentprincipal component analysisworking memory
Type
Research Article
Information
The Spanish Journal of Psychology , Volume 19 , 2016 , E62
Copyright
Copyright © Universidad Complutense de Madrid and Colegio Oficial de Psicólogos de Madrid 2016 

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