الفهرس 
المدخل إلى الدراسةيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The study aimed to identify the prevalence of learning disabilities in science preparatory phase, also aimed to identify significant differences between the ordinary pupils and people with learning disabilities in science in the dimensions of the knowledge structure the following (quantity - quality - integration - the relative stability), and for this study was conducted field used the analytical method, use the many tools as a measure of intelligence Cattell (Scale II), also used a test in science, and also the measure of cognitive structure dimensions (quantity - quality - integration - the relative stability). The results showed that the prevalence of learning disabilities in science to students of middle school 15%, and proved the existence of statistically significant differences in the prevalence of learning in science disabilities in middle school between boys and girls for boys, and proved the existence of statistically significant differences between the average scores ordinary people with learning disabilities in the quantum degrees of dimensions(quantity - quality – integration) for the benefit of ordinary alone, while not prove the existence of differences in the degree of relative stability of the structure of knowledge when ordinary people with learning disabilities in science.