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Related Concept Videos

Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Information Processing Approach01:30

Information Processing Approach

The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is also...

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Related Experiment Video

Updated: May 12, 2026

Using Brain Activation (nir-HEG/Q-EEG) and Execution Measures (CPTs) in a ADHD Assessment Protocol
13:09

Using Brain Activation (nir-HEG/Q-EEG) and Execution Measures (CPTs) in a ADHD Assessment Protocol

Published on: April 1, 2018

Specificity of basic information processing and inhibitory control in attention deficit hyperactivity disorder.

G A Salum1, J Sergeant2, E Sonuga-Barke3

  • 1National Institute of Developmental Psychiatry for Children and Adolescents - CNPq, São Paulo, Brazil.

Psychological Medicine
|April 9, 2013
PubMed
Summary

Basic information processing (BIP) deficits, specifically poorer processing efficiency, are key to attention deficit hyperactivity disorder (ADHD) pathophysiology, challenging inhibitory-based executive functioning (IB-EF) theories. These findings highlight processing efficiency as a specific mechanism in ADHD.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Child Psychiatry

Background:

  • Attention deficit hyperactivity disorder (ADHD) is associated with inhibitory-based executive functioning (IB-EF) and basic information processing (BIP) deficits in clinic-referred samples.
  • It is unclear if these deficits exist in non-referred ADHD samples, are specific to ADHD, or how comorbidity with oppositional defiant disorder/conduct disorder (ODD/CD) affects them.
  • The study investigates whether IB-EF deficits are primary or secondary to BIP deficits in ADHD.

Purpose of the Study:

  • To determine if BIP and IB-EF deficits occur in non-referred ADHD samples.
  • To assess if these deficits are specific to ADHD compared to other disorders.
  • To examine the effects of ADHD and ODD/CD comorbidity on cognitive performance.
  • To investigate the primary etiological role of BIP versus IB-EF deficits in ADHD.

Main Methods:

  • Assessed 704 children (6-12 years) from a non-referred sample using the Development and Well-Being Assessment (DAWBA).
  • Classified participants into groups: typical developing controls (TDC), Fear disorders, Distress disorders, ADHD, ODD/CD, and ADHD+ODD/CD.
  • Evaluated neurocognitive performance using tasks measuring reaction time, conflict control, and Go/No-Go responses.
  • Utilized a diffusion model (DM) to analyze BIP components like processing efficiency, speed-accuracy trade-off, and encoding/motor function.

Main Results:

  • Poorer processing efficiency was specific to ADHD, differentiating it from typical development and other disorders.
  • Faster encoding/motor function was observed in ADHD compared to TDC and fear/distress groups.
  • A more cautious response style, not impulsivity, distinguished ADHD from TDC and ODD/CD.
  • Comorbidity of ADHD and ODD/CD showed only additive effects on cognitive performance.
  • All observed IB-EF effects in ADHD were fully explained by underlying BIP deficits.

Conclusions:

  • Findings challenge the traditional inhibitory-based executive functioning (IB-EF) hypothesis for ADHD.
  • Processing efficiency deficits are identified as a key, specific mechanism underlying ADHD pathophysiology.
  • The results emphasize the critical role of basic information processing in understanding ADHD.