AU - خلف الله، محمد جابر AB - The research aimed at investigating the effectiveness of a program via YouTube for dual communication versus multi communication on the achievement, performance and attitudes of students in the educational rehabilitation, Al-Azhar University with high motivation versus low motivation in teaching aids curriculum. The sample of the research consisted of 48 students and they were divided into four experimental groups: (Group (1) dual communication with low motivation - group (2) dual communication with high motivation - group (3) multi communication with low motivation- group (4) multi-communication with high motivation. Each group consisted of twelve students. The research used a measuring test for measuring cognitive aspect related with the skills of using the teaching aids, a checklist for measuring the practical performance skills of using teaching aids, and a scale for measuring attitudes towards learning through YouTube, and the scale of motivation for learning (issued by the Michigan University, USA).T he research used the experimental approach to achieve the results. The results revealed the effectiveness of the program submitted via YouTube in developing achievement and performance for the sample of the research and in attitudes toward learning via YouTube regardless the style of communication and the level of motivation. The results also revealed the outperformance of multi communication group via YouTube to dual communication group in achievement, performance and attitudes, as the results revealed the outperformance of the high-level of motivation group on that group of low-level of motivation in achievement, performance and attitudes. The results revealed that there is no effect of interaction or direct effect for the two variables of communication styles (dual - Multi) and the level of motivation (high- low) on the achievement of students via YouTube. (Published abstract) http://search.shamaa.org/abstract_en.gif OP - ص ص. 15-102 T1 - فاعلية اختلاف أنماط التواصل (ثنائي-متعدد) عبر اليوتيوب والدافعية للتعلم (مرتفعة-منخفضة) في تقديم مقرر الوسائل التعليمية للدارسين بالتأهيل التربوي بجامعة الأزهر لتنمية التحصيل والأداء والاتجاهات [مقال] UL - http://search.shamaa.org/PDF/Articles/EGAsep/AsepNo56Y2014/asep_2014_n56_015-102.pdf النص الكامل (PDF) 1 http://search.shamaa.org/fulltext.gif