The present study evaluated the stability of math learning difficulties over a 2-year period and investigated several factors that might influence this stability (categorical vs. continuous change, liberal vs. conservative cut point, broad vs. specific math assessment); the prediction of math performance over time and by performance level was also…

Background: The marked degree of heterogeneity in persons with developmental dyslexia has motivated the investigation of possible subtypes. Attempts have proceeded both from theoretical models of reading and the application of unsupervised learning (clustering) methods. Previous cluster analyses of data obtained from persons with reading…

Results indicated recall and category clustering were highest following a manipulation to produce semantic encoding of items and lowest when children focused on items' physical features. Reading disabled boys failed to organize or study as effectively as normals. The reading disabled had difficulty in spontaneously generating effective study…