Strengths and weaknesses in the cognitive profile of youngsters with Prader-Willi syndrome.

In this report we present the results of a study of the intellectual functioning and cognitive profile of 26 Prader-Willi syndrome (PWS) patients. The mean IQ score was 62.3 (range 39-96). In 13 patients a significant difference between verbal and performance IQ was found. In 10 of them the performance IQ was higher than the verbal. The results of subtest analysis indicate that cognitive strengths are more visible than cognitive weaknesses. Highest scores were noted especially in the performance scale, i.e. Block Design (9 children) and Coding or Mazes (5 children). Analysis of all available data indicates that PWS patients score better on visual motor discrimination skills than on auditory verbal processing skills. These results are promising for intervention programs and education strategies.