This longitudinal randomized-control trial investigated the effectiveness of scientifically based reading instruction for students with IQs ranging from 40 to 80, including students with intellectual disability (ID). Students were randomly assigned into treatment (n = 76) and contrast (n = 65) groups. Students in the treatment group received…

Background: This study examined the ability of 78 children (aged 9-12 years) with an intellectual disability (ID) to provide a narrative account of a staged event they had participated in four days earlier. Method: The children were interviewed using open-ended questions. The quality of their responses (using a story grammar framework) was…

The stigma associated with being labeled as mentally handicapped is discussed. (DB)

Performances of 18 retarded young adults on the Porteus Maze Test (a measure of planning capacity and foresight) were compared with those of 117 first- through fourth-grade nonretarded children. (Author)

This study found that 10 adolescents with mental retardation processed stimuli varying with respect to symmetry in comparable manner to peers matched for mental age and chronological age. Results argue for the robustness of the symmetry effect across groups differing in intelligence and physically dissimilar stimulus types (checkerboard versus…

The performance of 4 groups of mentally retarded Ss, ages 14-17 with mental ages of 8-11, was compared to that of 90 non retarded Ss, grades K-5 with comparable mental ages, on the solution of 2 and 3 disc Hanoi Tower puzzles, solutions to which require logical forsight. (BB)

Investigated were psychological differences between 24 mongoloid and 56 nonmongoloid retarded Ss (mean age 17 years) by means of analyses of covariance and a discriminant analysis. After the covariance adjustments, only the psychomotor factor differed significantly between mongoloid and nonmongoloid groups. The visual perception factor was the…

The role of mental age (MA) and visual-perceptual ability in number concept development was examined with 48 nonretarded and retarded children from regular school settings. (Author)