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Madeleine J Groom, Zoe Young, Charlotte L Hall, Alinda Gillott, Chris Hollis
There is a clinical need for objective evidence-based measures that are sensitive and specific to ADHD when compared with other neurodevelopmental disorders. This study evaluated the incremental validity of adding an objective measure of activity and computerised cognitive assessment to clinical rating scales to differentiate adult ADHD from Autism spectrum disorders (ASD). Adults with ADHD (n=33) or ASD (n=25) performed the QbTest, comprising a Continuous Performance Test with motion-tracker to record physical activity...
September 30, 2016: Psychiatry Research
Nicklas Hult, Josefin Kadesjö, Björn Kadesjö, Christopher Gillberg, Eva Billstedt
OBJECTIVE: We assess the diagnostic accuracy of the QbTest, which measures the cardinal symptoms of ADHD. METHOD: The study group comprised 182 children (mean age about 10 years), of whom 124 had ADHD and 58 had other clinical diagnosis of which 81% had ASD. RESULTS: Only QbTest parameters for inattention and hyperactivity differentiated between ADHD and other clinical diagnoses at the p ≤ .01 level, not for measures of impulsivity. Sensitivity ranged from 47% to 67% and specificity from 72% to 84%...
July 29, 2015: Journal of Attention Disorders
Charlotte L Hall, Gemma M Walker, Althea Z Valentine, Boliang Guo, Catherine Kaylor-Hughes, Marilyn James, David Daley, Kapil Sayal, Chris Hollis
INTRODUCTION: The National Institute for Health and Care Excellence (NICE) guidelines for attention deficit/hyperactivity disorder (ADHD) state that young people need to have access to the best evidence-based care to improve outcome. The current 'gold standard' ADHD diagnostic assessment combines clinical observation with subjective parent, teacher and self-reports. In routine practice, reports from multiple informants may be unavailable or contradictory, leading to diagnostic uncertainty and delay...
2014: BMJ Open
D Bijlenga, M Jasperse, S K Gehlhaar, J J Sandra Kooij
PURPOSE: To evaluate the QbTest as an objective measure versus self-reported ADHD Rating Scale (ADHD-RS) before and during stimulant treatment in adults with ADHD. PATIENTS AND METHODS: We used the subjective ADHD Rating Scale (ADHD-RS), and the objective computerized QbTest, which is a 20-minute unconditional identical pairs test that measures attention, impulsivity, and also hyperactivity using a motion-tracking system. Patients were assessed before (baseline) and during medical treatment with stimulants (follow-up) in an observational study design...
January 2015: European Psychiatry: the Journal of the Association of European Psychiatrists
Verena Reh, Martin Schmidt, Winfried Rief, Hanna Christiansen
BACKGROUND: It is well-established that ADHD children have deficits in executive functions such as performance variability and sustained attention. It has been suggested that these deficits are intermediate phenotypes. Hyperactivity, a core symptom of ADHD, has not yet been explored as a potential intermediate phenotype in ADHD. The computerized Quantified behavior Test (QbTest) is a combined continuous performance and activity test that assesses hyperactivity, inattention, and impulsivity separately...
2014: Behavioral and Brain Functions: BBF
Staffan Söderström, Richard Pettersson, Kent W Nilsson
BACKGROUND: Self-rating scales and cognitive tests are instruments used in the assessment of attention-deficit hyperactivity disorder (ADHD). However, few studies have examined the differential validity of these kinds of instruments in psychiatric samples. AIMS: To examine the discriminative validity of two self-report scales (ADHD Self-Report Scale [ASRS v.1.1], Current Symptom Scale [CSS]) and a continuous performance test with measures of motor activity (QBTest Plus)...
January 2014: Nordic Journal of Psychiatry
Verena Reh, Martin Schmidt, Le Lam, Benno G Schimmelmann, Johannes Hebebrand, Winfried Rief, Hanna Christiansen
OBJECTIVE: Hyperactivity, one of the core symptoms of ADHD, has been mostly neglected in neuropsychological assessment of childhood ADHD. The neuropsychological Quantified behavior Test (QbTest) separately assesses all three core symptoms of ADHD on a behavioral level. Factor structure of the QbTest and its concurrent and discriminant validity are presented. METHOD: An exploratory factor analysis (n = 828 children) was performed. In a second sample (n = 102 children) a Multi-Trait-Multi-Method (MTMM) approach was used for validity analyses...
December 2015: Journal of Attention Disorders
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