Test–Retest Reliability of the Electronic Instrumental activities of daily living Satisfaction Assessment (EISA): A Cohort Study

Importance: Currently, no self-report instruments exist for assessing satisfaction with performing instrumental activities of daily living and occupations for people with disabilities using internet-connected assistive devices like accessible smartphones, tablets, laptops, and apps. Objective: To assess the test–retest reliability and internal consistency of the Electronic Instrumental activities of daily living Satisfaction Assessment (EISA) self-report outcome tool. Design: Repeated-measures cohort study with a time frame of 7 to 21 days. Setting: Multicity online recruitment at assistive technology clinics, nongovernmental organizations, advocacy and peer support groups for people with disabilities, and higher education institutions. Participants: Eighty-four participants with disabilities, age 18 yr or older, with a mean age of 43.3 yr (range 5 19–75 yr), and 57% female. Intervention: Not applicable. Outcomes and Measures: The a priori study hypotheses were that the EISA test–retest reliability scores would be above the minimum acceptable level (Rs > .80) and that internal consistency would be good (Cronbach’s a 5 .70–.90). Results: On the basis of the study data, the EISA, Version 1.0, demonstrated good test–retest reliability (Rs 5 .81) and excellent internal consistency (Cronbach’s a 5 .88). Conclusions and Relevance: The results of the test–retest reliability and internal consistency analyses provide good support for the EISA to be used in clinical settings.