Factor Structure and Psychometric Properties of the Learning, Executive, and Attention Functioning (LEAF) Scale in Young Adults.

Abstract

The Learning, Executive, and Attention Functioning (LEAF) scale is a resource-friendly means of assessing executive functions (EFs) and related constructs (e.g., academic abilities) in children and adolescents that has been adapted for use with adults. However, no study in any population has investigated the factor structure of all LEAF EF items to determine whether items factor in a manner consistent with the originally proposed scale structure. Therefore, we examined LEAF scale responses of 546 young adults (M_age = 20.05, SD = 2.17). Upon removing academic items following a preliminary factor analysis, we performed principal axis factoring on the remaining 39 EF items. The final model accounted for 61.75% of the total variance in LEAF EF items and suggested that these items assess six moderately correlated EF constructs in young adults. We constructed six updated subscales to help researchers measure these EFs in young adults using the LEAF scale, each of which uniquely and differentially predicted measures of self-reported impulsivity, academic difficulties, and learning-related disorder history. Overall, the LEAF promises to be an accessible means of assessing a range of EF constructs in young adults, particularly when updated subscale structures based on factor analysis are used.