Objective: The General Life Functioning Scale (GLF) was developed to provide a complementary alternative to existing measures of impairment. We examined the psychometric properties of the GLF-Parent version (GLF-P), given the known value of informant ratings.

Methods: The GLF-P was administered to parents of adults with attention-deficit/hyperactivity disorder (ADHD) diagnosed in childhood and a nonADHD comparison group in the Pittsburgh ADHD Longitudinal Study. GLF-P ratings described 334 participants (ADHD = 186; comparison = 148) rated at age 25 (M  = 24.80 years, SD  = 0.46, range = 24-26) and 401 participants (ADHD = 237; comparison = 164) rated at age 30 (M  = 29.30, SD  = 0.64, range = 28-33). Exploratory (EFA) and confirmatory (CFA) factor analyses were used.

Results: EFAs suggested and CFAs confirmed a five-factor solution. We found measurement invariance across diagnostic and age groups, satisfactory internal consistency, construct validity, and known-group validity.

Conclusion: Psychometric results suggest the GLF-P as a helpful adjunctive measure of functioning. Further research is needed to determine the utility of the GLF across diverse settings.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8767958PMC
http://dx.doi.org/10.1002/jclp.23285DOI Listing

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