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Twin study on heritability of activity, attention, and impulsivity as assessed by objective measures
- Publication Year :
- 2006
-
Abstract
- Objective: The purpose of this study was to assess heritability of activity, attention, and impulsivity by comparing young monozygotic (MZ) twins with dizygotic (DZ) twins using objective measures. Method: The OPTAx test is an infrared motion analysis to record the movement pattern during a continuous performance test. Seventeen MZ and 12 same sexed DZ twin pairs in the range of 6 to 12 years were tested. The zygosity was determined by DNA-fingerprinting. The measures under investigation were activity (microevents and spatial scaling), impulsivity (errors of commission), and attention (accuracy and variability). For statistical analyses, the classical model of Falconer and the ACE and ADE genetic model for twin data were applied in order to estimate the proportion of the variance in activity, impulsivity and attention that is due to genetic effects. Results: The respective coefficients of intraclass correlations in MZ twins ranged between .35 and .65 whereas for DZ twins the correlations were between .12 and .88. The heritability estimates resulting from both models were about 30% for 4 of the 5 measures, but none of these was significantly different from 0. Conclusion: We found no significant influence of genetic factors for activity, attention, and impulsivity. The authors conclude that further investigation of heritability of ADHD is necessary using larger sample sizes and objective measures.
- Subjects :
- Male
Medizin
Motor Activity
Impulsivity
Developmental psychology
03 medical and health sciences
0302 clinical medicine
Statistical analyses
Statistics
Genetic model
Diseases in Twins
Twins, Dizygotic
Developmental and Educational Psychology
medicine
Humans
Attention
030212 general & internal medicine
Child
Twins, Monozygotic
Heritability
Twin study
Zygosity
030227 psychiatry
Disruptive, Impulse Control, and Conduct Disorders
Clinical Psychology
Movement pattern
Social Class
Attention Deficit Disorder with Hyperactivity
Attention deficit
Female
medicine.symptom
Psychology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a30a531705dc117807979c43f2638637