Is attention impaired in ADHD?

Area of Science:

• Neuroscience
• Psychology
• Developmental Psychology

Background:

• Attention Deficit Hyperactivity Disorder (ADHD) is often explained by deficits in executive functions (EF) or inhibition.
• Alternative theories propose ADHD primarily involves weaknesses in sustained and controlled attention, not selective attention.

Purpose of the Study:

• To analyze the structure of the Test of Everyday Attention in Children (TEA-Ch) and its distinctions between attention types.
• To reconcile inconsistent findings regarding selective attention in individuals with and without ADHD.
• To evaluate the explanatory power of executive function weaknesses versus attention deficits in ADHD.

Main Methods:

• Analysis of the underlying structure of the TEA-Ch.
• Review and comparison of evidence from visual search tasks measuring selective attention.
• Examination of studies employing tasks that engage executive functions.

Main Results:

• The distinction between selective, sustained, and controlled attention within the TEA-Ch is not well-supported.
• While speed of performance on selective attention tasks is similar, accuracy differs between impaired and unimpaired attention groups.
• Evidence from visual search tasks is inconsistent, but tasks engaging EF are more likely to reveal group differences.

Conclusions:

• The current distinctions within the TEA-Ch regarding attention types are questionable.
• Executive function weaknesses provide a more plausible explanation for attention impairments observed in ADHD.
• Future research should focus on tasks that precisely measure EF components to better understand ADHD-related attention deficits.