Ideational Slippage in Middle-Aged and Older Adults: A Preliminary Study

Eamonn P. Arble (), Steven W. Steinert, Sneha Shankar, Alex Cerjanic, Bradley P. Sutton and Ana M. Daugherty ()
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Eamonn P. Arble: Department of Psychology, Eastern Michigan University, Ypsilanti, MI 48197, USA
Steven W. Steinert: Department of Psychology, Eastern Michigan University, Ypsilanti, MI 48197, USA
Sneha Shankar: Department of Psychology, Eastern Michigan University, Ypsilanti, MI 48197, USA
Alex Cerjanic: Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
Bradley P. Sutton: Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
Ana M. Daugherty: Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA

IJERPH, 2024, vol. 21, issue 6, 1-10

Abstract: Ideational slippage—characterized by incorrect word usage and strained logic during dialogue—is common in aging and, at greater frequency, is an indicator of pre-clinical cognitive decline. Performance-based assessment of ideational slippage may be useful in the study of cognitive aging and Alzheimer’s-disease-related pathology. In this preliminary study, we examine the association between corpus callosum volume and a performance-based assessment of ideational slippage in middle-aged and older adults (age 61–79 years). Ideational slippage was indexed from cognitive special scores using the Rorschach Inkblot Method (RIM), which are validated indices of deviant verbalization and logical inaccuracy ( Sum6 , WSum6 ). Among middle-aged and older adults, smaller splenium volume was associated with greater ideational slippage (η p 2 = 0.48), independent of processing speed and fluid intelligence. The observed negative associations are consistent with visuospatial perception and cognitive functions of the splenium. The effect was strongest with the splenium, and volumes of the genu and total white matter had small effects that were not statistically significant. Conclusions: Results are discussed with future application of RIM special scores for the assessment of pre-clinical cognitive decline and, based on observed effect sizes, power analyses are reported to inform future study planning.

Keywords: splenium; genu; white matter; Rorschach Inkblot Method (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2024
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