Psychiatry Investig.  2018 Dec;15(12):1154-1161. 10.30773/pi.2018.10.10.2.

Relationship of Working Memory, Processing Speed, and Fluid Reasoning in Psychiatric Patients

• Kim SJ
• Park EH

• KMID: 2434764
• DOI: http://doi.org/10.30773/pi.2018.10.10.2

Abstract

OBJECTIVE
The present study aimed to investigate relationship among cognitive factors (working memory and processing speed) and fluid reasoning (Gf) in psychiatric patients using a standardized clinical tool.
METHODS
We included the responses of 115 heterogeneous patients who were diagnosed with the MINI-Plus 5.0 and WAIS-IV/WMS-IV was administered. For our analysis, structured equation modeling (SEM) was conducted to evaluate which cognitive variables are closely related to the Gf.
RESULTS
The results showed that the visual working memory was the strongest predictor of the Gf compared to other cognitive factors.
CONCLUSION
Processing speed was capable of predicting the Gf, when visual working memory was controlled. The inter-relationship among the Gf and other cognitive factors and its clinical implications were further discussed.

Keyword

Working memory; Processing speed; Fluid reasoning; WAIS-IV; WMS-IV

MeSH Terms

Humans
Memory
Memory, Short-Term*