The Delis-Kaplan Executive Function System Sorting Test as an evaluative tool for executive functions after severe...

Area of Science:

• Neuroscience
• Clinical Psychology
• Rehabilitation Medicine

Background:

• Traumatic brain injuries (TBIs) frequently result in executive function (EF) deficits.
• Neuropsychological tests are crucial for assessing these cognitive impairments.

Purpose of the Study:

• To compare the diagnostic sensitivity of three executive function tests: the Delis-Kaplan Executive Function System Sorting Test (D-KEFS ST), Wisconsin Card Sorting Test (WCST), and Trail Making Test (TMT).
• To identify the most effective tests for differentiating severe TBI patients from healthy controls.

Main Methods:

• A comparative study design was employed.
• The D-KEFS ST, WCST, and TMT were administered to severe TBI patients and a control group of healthy individuals.
• Statistical analyses, including receiver operating characteristic (ROC) analysis, were used to evaluate test performance.

Main Results:

• The D-KEFS ST demonstrated significant differences between groups across all 5 evaluated variables.
• The WCST showed significant differences in 4 out of 6 variables.
• The TMT showed significant differences in 2 out of 2 variables.
• ROC analysis identified "attempted sorts" on the D-KEFS ST and completion time on TMT Part B as the strongest predictors of group assignment.

Conclusions:

• The D-KEFS ST appears to be a highly sensitive tool for detecting executive function deficits post-TBI.
• Specific metrics from the D-KEFS ST and TMT can effectively distinguish TBI patients from healthy controls.
• These findings support the utility of the D-KEFS ST in the clinical evaluation of TBI-related executive dysfunction.