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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
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Related Experiment Video

Updated: Jan 31, 2026

Using Brain Activation nir-HEG/Q-EEG and Execution Measures CPTs in a ADHD Assessment Protocol
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Which components of processing speed are affected in ADHD subtypes?

Michelle Y Kibby1, Sarah A Vadnais1, Audreyana C Jagger-Rickels1

  • 1a Department of Psychology , Southern Illinois University , Carbondale , IL , USA.

Child Neuropsychology : a Journal on Normal and Abnormal Development in Childhood and Adolescence
|December 19, 2018
PubMed
Summary
This summary is machine-generated.

Children with Attention-Deficit/Hyperactivity Disorder (ADHD) show slower processing speed, particularly in perceptual and decision-making tasks. Deficits are linked to inattention and hyperactivity, indicating processing speed is multifaceted in ADHD.

Keywords:
ADHD subtypeshyperactivity/impulsivityinattentionprocessing speed

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Child Psychiatry

Background:

  • Attention-Deficit/Hyperactivity Disorder (ADHD) is associated with processing speed (PS) deficits.
  • Specific components of PS affected in ADHD and variations across subtypes remain unclear.

Purpose of the Study:

  • To investigate which PS components are most impacted in ADHD subtypes (Predominantly Inattentive and Combined Type).
  • To examine the relationship between PS components and ADHD symptom dimensions (inattention, hyperactivity/impulsivity).

Main Methods:

  • 151 children (ages 8-12) with ADHD subtypes and typically developing controls were assessed.
  • Four PS measures were used: Symbol Search, Coding, Decision Speed, and simple reaction time.

Main Results:

  • Children with ADHD (both subtypes) exhibited slower perceptual and psychomotor/incidental learning speed than controls.
  • ADHD-Predominantly Inattentive type showed slower decision speed.
  • Perceptual and psychomotor speed correlated with inattention; psychomotor speed/incidental learning correlated with hyperactivity/impulsivity.

Conclusions:

  • Processing speed deficits in ADHD are not uniform and are linked to specific task demands.
  • Inattention is primarily associated with PS deficits, but hyperactivity/impulsivity also plays a role.
  • PS is a complex, multifaceted system differentially affected in ADHD.