Patch testing in children: a study of 562 schoolchildren
Related Experiment Video
Updated: Nov 5, 2026

14:05
Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
Published on: January 23, 2017
M A Barros1, A Baptista, T M Correia
1Department of Dermatology and Venereology, Hospital de S. João, Porto, Portugal.
Contact Dermatitis
|September 1, 1991
Abstract:
562 schoolchildren from Oporto were patch tested with the standard series of the Portuguese Contact Dermatitis Group (GPEDC). 13.3% of the children had positive reactions, the most common being to neomycin, thimerosal, para-tertiary-butylphenol-formaldehyde (PTBPF) resin and fragrance-mix. Thus contact allergy in children seems not to be as unusual as previously thought.
Related Concept Videos
Group Design
The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...
Psychometric Approach of Cognitive Development
The psychometric approach examines cognitive development by measuring individual differences in abilities that contribute to intelligence. Intelligence includes the capacity to learn, remember, apply knowledge, understand relationships among concepts, and solve everyday problems. Intelligent behavior is generally goal-directed and adaptive because it helps individuals achieve objectives and adjust to changing situations.Intelligence Testing in ChildrenIn school-age children, intelligence is...

