DAB-4

Internal consistency (content sampling) reliability coefficients for all of the composites range from .89 to .97. The test-retest (time sampling) coefficient for the Total Basic Academic Skill composite is .94. Correlations of the DAB-4 composite scores with those of other well-known academic achievement measures range from .56 to .76. Diagnostic accuracy studies indicate that the DAB-4 is able to accurately identify students with poor academic achievement and students with a prior learning disability diagnosis (i.e., median sensitivity = .85, median specificity = .95, median ROC/AUC = .98). Considerable other validity evidence is provided in the manual.

Normative data was collected from 2011 to 2013 and is based on a sample of 1,310 students. The sample is stratified by age relative to region, gender, ethnicity, socioeconomic factors, and other critical variables. Easy to administer and score and free of gender, ethnic, and disability bias, the DAB-4 is an excellent resource for professionals concerned with the identification of learning problems, special education placement, and remedial planning.