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Occupation-based interventions such as Cognitive\u2013Functional Intervention for Adults (Cog-Fun-A) aim to address these challenges, yet little is known about variability in engagement and outcomes. This brief report describes three contrasting cases drawn from a Cog-Fun-A pilot study. Participants completed pre\u2013post assessments including the Behavior Rating Inventory of Executive Function\u2013Adult Version, Canadian Occupational Performance Measure, Adult ADHD Quality of Life Scale, Self-Regulation Skills Interview, and Model of Human Occupation Screening Tool. Therapist session logs were analyzed using descriptive content analysis to construct within-case and cross-case profiles. Two participants demonstrated clinically meaningful improvements in occupational performance, satisfaction, quality of life, and self-regulation, whereas one showed minimal change. Patterns across cases suggested that motivation, attribution style, routine stability, and environmental supports may influence engagement and strategy use in metacognitive, occupation-based intervention.<\/jats:p>","DOI":"10.1177\/15394492261464070","type":"journal-article","created":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T05:16:47Z","timestamp":1783574207000},"page":"719-727","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Cognitive-Functional Intervention for Adults With ADHD (Cog-Fun-A): An Extreme Case Series Analysis"],"prefix":"10.1177","volume":"46","author":[{"given":"Ifat","family":"Velder Shukrun","sequence":"first","affiliation":[{"name":"Hebrew University of Jerusalem, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9831-3037","authenticated-orcid":false,"given":"Jennifer R.","family":"Budman","sequence":"additional","affiliation":[{"name":"Hebrew University of Jerusalem, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adina","family":"Maeir","sequence":"additional","affiliation":[{"name":"Hebrew University of Jerusalem, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,7,8]]},"reference":[{"key":"e_1_3_3_2_1","doi-asserted-by":"crossref","unstructured":"Adamou M. 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