Construct validity of reading measures in adults with significant reading difficulties

Area of Science:

• Learning Disabilities
• Adult Literacy Research
• Psychometrics

Background:

• Adult literacy research presents unique measurement challenges.
• Comparing adult and childhood literacy studies reveals both similarities and differences.
• Understanding construct validity is crucial for accurate literacy assessment.

Purpose of the Study:

• To examine measurement issues in adult literacy.
• To compare adult literacy findings with those from childhood literacy studies.
• To assess the construct validity and invariance of literacy measures across age groups.

Main Methods:

• Analysis of four studies on adult literacy published in the Journal of Learning Disabilities.
• Comparative analysis with existing childhood literacy research.
• Evaluation of construct validity and invariance across different populations.

Main Results:

• Convergence observed in construct validity issues between adult and childhood literacy studies.
• Evidence of construct invariance across children and adults.
• Identified instructive examples where adult and childhood literacy models do not converge.

Conclusions:

• Literacy measurement in adults requires careful consideration of specific population characteristics.
• Construct validity is a key area of convergence between adult and child literacy research.
• Caution is advised against directly applying child-based literacy models to adult populations due to potential differences.