The Prevalence of Additional Problems among Mentally Retarded Pupils as Compared to Mentally Normal Pupils1

Haugen, R. 1981. The Prevalence of Additional Problems among Mentally Retarded Pupils as Compared to Mentally Normal Pupils. Scandinavian Journal of Educational Research 25,189-200. The concept of additional problems is introduced in relation to mentally retarded pupils (MRP). It is defined as a significant discrepancy between a pupil's a) MA and achievements in reading-writing, mathematics, and speech, b) CA and achievements in vision, hearing, fine and gross motor expression, and c) 'normal' somatic and emotional behavior and actual somatic and emotional behavior. The results strongly confirm the hypothesis that the prevalence of additional problems among MRP is greater as compared to mentally normal pupils with respect to all the nine variables under comparison.