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The Role of Neurocognitive Tests in the Assessment of Adult Attention-Deficit/Hyperactivity Disorder
Journal article   Open access   Peer reviewed

The Role of Neurocognitive Tests in the Assessment of Adult Attention-Deficit/Hyperactivity Disorder

Molly A Nikolas, Paul Marshall and James B Hoelzle
Psychological assessment, Vol.31(5), pp.685-698
05/2019
DOI: 10.1037/pas0000688
PMID: 30730189
url
https://doi.org/10.1037/pas0000688View
Published (Version of record) Open Access

Abstract

Despite widespread recognition that attention-deficit/hyperactivity disorder (ADHD) is a lifelong neurodevelopmental disorder, optimal methods of diagnosis among adults remain elusive. Substantial overlap between ADHD symptoms and cognitive symptoms of other mental health conditions, such as depression and anxiety, and concerns about validity in symptom reporting have made the use of neuropsychological tests in ADHD diagnostic assessment appealing. However, past work exploring the potential diagnostic utility of neuropsychological tests among adults has often relied on a relatively small subset of tests, has failed to include symptom and performance validity measures, and often does not include comparison groups of participants with commonly comorbid disorders, such as depression. The current study examined the utility of an extensive neuropsychological measure battery for diagnosing ADHD among adults. Two hundred forty-six participants (109 ADHD, 52 depressed, 85 nondisordered controls) completed a multistage screening and assessment process, which included a clinical interview, self, and informant report on behavior rating scales, performance and symptom validity measures, and an extensive neuropsychological testing battery. Results indicated that measures of working memory, sustained attention, response speed, and variability best discriminated ADHD and non-ADHD participants. While single test measures provided performed poorly in identifying ADHD participants, analyses revealed that a combined approach using self and informant symptom ratings, positive family history of ADHD, and a reaction time (RT) variability measure correctly classified 87% of cases. Findings suggest that neuropsychological test measures used in conjunction with other clinical assessments may enhance prediction of adult ADHD diagnoses. Public Significance Statement This study suggests that cognitive tests may be most useful in the diagnostic assessment of ADHD among adults when used in combination with symptom report scales and family history information. These results caution against the use of cognitive tests alone in the diagnostic process and emphasize inclusion of performance validity measures and measures of depression when evaluating ADHD among adults.
attention-deficit/hyperactivity disorder diagnostic assessment neuropsychological tests

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