Related Experiment Video
Updated: May 7, 2026

Assessing Dyslexia at Six Year of Age
Published on: May 1, 2020
Academic Achievement Among Juvenile Detainees
Elena L Grigorenko1, Donna Macomber2, Lesley Hart3
1Yale University, New Haven, CT, USA Teachers College, Columbia University, New York, NY, USA Moscow State University, Russia Fielding Graduate University, Santa Barbara, CA, USA Elena.grigorenko@yale.edu.
Learning disabilities (LD) affect nearly a quarter of detained youth, with frequencies ranging from 13% to 40%. This study systematically assessed LD prevalence and skill deficits in juvenile offenders.
Area of Science:
- Forensic Psychology
- Developmental Psychology
- Educational Psychology
Background:
- Existing literature suggests a high prevalence of learning disabilities (LD) among law offenders.
- However, systematic appraisals, frequency estimations, and investigations into correlates and causes of LD in this population are lacking.
Purpose of the Study:
- To systematically assess the frequency and characteristics of learning disabilities in a population of detained youth.
- To explore the type and severity of reading and mathematics skill deficiencies among juvenile detainees.
Main Methods:
- Data were collected from 1,337 unique admissions of youth in Connecticut detention facilities.
- A computerized educational screener and the Wide Range Achievement Test were administered to assess reading and mathematics skills.
- Quantitative and qualitative indicators were analyzed to determine the prevalence and nature of LD.
Main Results:
- The prevalence of learning disabilities in the sample ranged from 13% to 40%, with an average of 24.9%.
- The study identified specific deficiencies in word and text reading, as well as mathematics skills.
Conclusions:
- Detained youth exhibit a significant prevalence of learning disabilities, highlighting a critical need for targeted educational and support interventions.
- This research provides a foundation for future studies linking these deficiencies to formal LD classifications and other developmental disorders.
Related Concept Videos
The Stanford Prison Experiment
Learning Disabilities
Dyslexia
Dyslexia is a...
Conduct Disorder
Cognitive Development During Adolescence
Punishment
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior.
Case Studies

