Five Digits Test - Validation of a Neuropsychological Test of Inhibition for Patients With Neuropsychiatric Conditions

Recruiting now

Conditions studied: Autism, ADHD

In brief

Neuropsychiatric conditions such as Attention Deficit Hyperactivity Disorder (ADHD) and autism are characterized by specific deficits in cognitive functions. Thus, neuropsychological assessment is a critical part of the diagnostic process for these conditions. Inhibition is a specific function of interest during these examinations, since it is often affected in patients with ADHD and/or autism. The Five Digits Test (FDT) is a newly developed test measuring inhibition, without requirements of reading ability, and only limited requirements of language proficiency. The aim of this study is to investigate the validity of the FDT in patients with neuropsychiatric conditions. The FDT will be validated using the following research questions: 1. Is the FDT equivalent to the standard neuropsychological test of inhibition, the Color-Word Interference Test from the Delis-Kaplan Executive Function System in patients with neuropsychiatric conditions? (Convergent validity) 2. Is the FDT consistent with self-assessment of inhibition and behavioral regulation in every day life using the Behavior Rating Inventory of Executive Function - Adult Version (BRIEF-A)? (Ecological validity) 3. Are there differences in validity in the first two research questions due to language background or due to reading and writing difficulties? 4. Are there differences between patients with neuropsychiatric conditions and healthy controls in the performance of the FDT?

Key facts

Study ID

NCT07531914

Run by

Umeå University

People needed

150

Starts

2026-01-21

Expected to finish

2027-12-01

Last updated by the study team

2026-04-15

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• age 18 and above
• Diagnosed with a ADHD or Autism, alternatively under examination these diagnoses

You may not qualify if…

• Addiction of alcohol or other substances
• Not speaker of Swedish to such extent that cannot read or comprehend the informed consent forms
• On sedatives, such as sleep or pain medication
• Not being able to participate in a neuropsychological examination, or to give informed consent

Where it is running

• Umeå University, Umeå University Hospital — Umeå, Sweden (enrolling)

Full record on ClinicalTrials.gov

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