Robitaille et al., 2012. Multivariate longitudinal modeling of cognitive aging: Examining associations among change and variation in processing speed and visuospatial ability.

Robitaille, A., Muniz-Terrera, G., Piccinin, A. M., Johansson, B., & Hofer, S. M. (2012). Multivariate longitudinal modeling of cognitive aging: Examining associations among change and variation in processing speed and visuospatial ability. GeroPsych: The Journal of Gerontopsychology and Geriatric Psychiatry, 25, 15-25.

Year: 
2012
Status: 
complete
Presentation Citations: 

Robitaille, A., Piccinin, A.M., Muniz, G., Hoffman, L., Johansson, B., Deeg, D.J., Aartsen, M.J., Comijs, H.C., & Hofer, S.M., (November, 2013). Longitudinal mediation of processing speed on age-related change in memory and fluid intelligence. Poster presented at the 66th Annual Scientific Meeting of the Gerontological Society of America, New Orleans, LA.

Robitaille, A., Muniz, G., Piccinin, A.M., Hofer, S.M. (2011, October). Multivariate longitudinal modeling of cognitive change: Relationship between processing speed and other cognitive outcomes. 40th Annual Scientific and Educational Meeting of the CAG & 4th Pan American Congress of the IAGG, Ottawa, ON.

Robitaille, A., Muniz, G., Piccinin, A.M., Hofer, S.M. (November, 2011). Does Processing Speed Account for Aging-related Change in other Cognitive Functions? In A.M. Piccinin & G. Muniz (Chairs), Advances in Understanding Cognitive Aging: Longitudinal Research on Change, Variation, and Plasticity. Symposium conducted at the 64th Annual Scientific Meeting of the Gerontological Society of America, Boston, MA

Robitaille, A., Muniz, G., Piccinin, A.M., Johansson, B.,&  Hofer, S.M. (February, 2012). Multivariate longitudinal modeling of cognitive change: Relationship between processing speed and visuospatial ability. Poster session submitted to the 2012 SRCD Themed Meeting: Developmental Methodology. Tampa, Florida

Abstract: 

We illustrate the use of the parallel latent growth curve model using data from OCTO-Twin. We found a significant intercept-intercept and slope-slope association between processing speed and visuospatial ability. Within-person correlations among the occasion-specific residuals were significant, suggesting that the occasion-specific fluctuations around individual’s trajectories, after controlling for intraindividual change, are related between both outcomes. Random and fixed effects for visuospatial ability are reduced when we include structural parameters (directional growth curve model) providing information about changes in visuospatial abilities after controlling for processing speed. We recommend this model to researchers interested in the analysis of multivariate longitudinal change, as it permits decomposition and directly interpretable estimates of association among initial levels, rates of change, and occasion-specific variation.