Investigation of the validity and reliability of the Turkish Form of the Adult Executive Functions Inventory (ADEXI)

Abstract

This study aims to examine the psychometric properties of the Turkish Version of the Adult Executive Functions Inventory (ADEXI), which was developed to evaluate the executive functions of adults. The study sample consisted of 330 university students aged between 18 and 30 (M = 20.59, SD =1.84). The participants filled out the Demographics Form, Cognitive Flexibility Inventory, Barrat Impulsivity Scale, Adult Attention Deficit Hyperactivity Disorder Self-Report Scale, and the Turkish version of ADEXI. The two-factor structure (working memory and inhibition) in the original version of the scale was confirmed by second-level confirmatory factor analysis. ADEXI's association with other measurement tools were also observed. Cronbach's alpha internal consistency coefficients for the total score of the scale and for the working memory and inhibition dimensions were calculated as .80, .83, and 73, respectively. Moreover, Gutman's two-half reliability coefficients for the total score of the scale and working memory and inhibition dimensions were calculated as .75, .81, and .69, respectively. Our results showed that the Turkish version of ADEXI is a valid and reliable measurement tool that can be used to evaluate two dimensions of executive functions, working memory and inhibition.