Differentiation between attention-deficit/hyperactivity disorder and pervasive developmental disorders with...

Area of Science:

• Child Psychology
• Neurodevelopmental Disorders
• Behavioral Pediatrics

Background:

• Children with attention-deficit/hyperactivity disorder (ADHD) and pervasive developmental disorders (PDD) often exhibit hyperactivity.
• Differentiating the specific activity level patterns in these conditions is crucial for accurate diagnosis and intervention.

Purpose of the Study:

• To compare objective activity levels between boys with ADHD, boys with PDD and hyperactivity, and typically developing controls.
• To investigate how activity levels differ in structured (in-seat classes) versus unstructured (recess) settings.

Main Methods:

• Actigraphy was used to objectively measure activity levels in 18 boys with ADHD, 10 boys with PDD and hyperactivity, and 18 control boys over one week.
• Activity levels were compared during in-seat classes and free recess periods.

Main Results:

• All groups showed higher average activity and lower standard deviation during recess compared to classes.
• Boys with ADHD had a lower standard deviation during recess than controls and boys with PDD.
• Boys with PDD exhibited a significantly lower average activity level overall compared to the other groups.

Conclusions:

• Objective activity levels reflect children's ability to adapt to situational changes.
• Activity patterns, particularly during unstructured times, may help distinguish hyperactivity in ADHD from other neurodevelopmental disorders.