Objective: The aim of this study was to evaluate the impact of ADHD and subclinical ADHD symptoms on long-term memory performance on visual, auditory, immediate, delayed, and recognition tasks. Background: Attention-Deficit/Hyperactivity Disorder (ADHD) and ADHDlike symptoms currently affect a significant proportion of the adult population. Memory is a primary cognitive process impacted by ADHD-like symptoms. Working memory impairment in ADHD is well-documented whereas less is known about the role of ADHD in long-term memory functioning, especially among adults. There is a great deal of variability in performance on memory measures within ADHD literature, however, little research includes those with ADHD symptoms below a clinical threshold. Method: A sample of 103 community-dwelling adults aged 18 to 84 with and without ADHD-like symptoms completed a variety of memory tasks via neuropsychological assessment measures. ADHD-like symptom type and severity were assessed by clinician-completed symptom rating scales and self-report. Regression analyses were used to determine the impact of symptom severity and type on memory performance across domains. Results: ADHD-like symptom severity was a significant predictor of performance on visual memory tasks, but the same was not found for other memory domains. Symptom type was not a significant predictor of performance on any memory domain. Discussion: Congruent with previous findings in extant literature, ADHD-like symptoms show a relationship to memory performance with variable findings across modalities. Symptom severity may account for deficits in performance on tasks of visual memory.
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