Exploratory Factor Analysis and Convergent Validity of the Adult Executive Function Inventory (ADEXI)

The Adult Executive Functioning Inventory (ADEXI)-a short, practical, self-report questionnaire accessible across diverse adult populations and languages-was used to assess executive functions (EFs), primarily inhibition and working memory.

To examine the construct validity of the ADEXI Hebrew version through exploratory factor analysis (EFA) and convergent validity by correlating scores with similar measures of EF.

Cross-sectional study using online anonymous surveys.

Nonclinical sample of 239 adults, 74.1% women, ages 18 to 80 yr (Mage = 44.19 yr, SD = 12.89).

The Hebrew version of the 14-item ADEXI, a demographic questionnaire, and the Dysexecutive Questionnaire (DEX).

Descriptive statistics, Cronbach's α EFA using varimax rotation, and Pearson's correlations were used. Total internal consistency was good (α = .86). Unlike the two factors in the original English version, our construct validity through EFA revealed three factors-inhibition, working memory, and, uniquely, flexibility-that accounted for 55.71% of the variance. Convergent validity was supported by medium to large significant correlations (r =.29-.76) between the ADEXI and the DEX subscales and total scores.

Our findings offer psychometric evidence to support using the Hebrew version of the ADEXI for EF assessments in adult Hebrew-speaking populations. Plain-Language Summary: The Adult Executive Functioning Inventory (ADEXI) assesses three key components: inhibition, working memory, and cognitive flexibility. In this study, we examined the construct validity of the Hebrew version of the ADEXI to assess executive functions. Our findings support using the ADEXI in Hebrew-speaking populations. The ADEXI offers occupational therapy practitioners serving Hebrew-speaking populations in their practice a validated tool for assessing executive functions.