Investigated whether differences by sex or race existed in placement, learning disabilities classrooms, teacher contacts, assignment practices, and student learning behavior. Found differences in placement. Similarities were found in teacher treatment, student behavior, and the effects of such behavior on test performance. (Author/CM)

The problem of variability of data, even in presumable homogeneous subgroupings of handicapped children, which contaminates the results of many special education curriculum evaluation studies is examined with a study of 103 second-grade learning disabled students. The distortion of statistics calculated on samples of extreme variability; coupled…