This paper presents the results of the study of the features of emotion manifestation (joy, neutral state, sadness, anger) in the voice and facial expressions of 12–14 year old adolescents with intellectual disabilities (ID) compared to typically developing (TD) peers. ID are qualitative and quantitative deviations in the development of mental abilities. The methods of perceptual analysis, instrumental acoustic analysis of speech and automatic analysis of facial expressions using FaceReader 8v software were used. It was found that adults better recognize joy and neutral state in the speech of adolescents with ID than TD. Gender differences in the manifestation of emotions were revealed: girls express emotions in speech more accurately than boys. Differences in the acoustic features of speech depending on the type of emotion expressed and gender were shown. Based on automatic analysis of facial expressions, it was found that TD adolescents more often demonstrate a neutral state, while adolescents with ID – joy.