Volume 30 #2

Contents

1. Results and future trends of sensory perception researches with the use of focused ultrasound
2. Auditory detection and classification of amplitude modulation: psychophysical and electrophysiological data
3. Features of speech describing tactile perceived fragmentary images by teenagers with normal and impaired vision
4. Spatial resolution of human auditory system in case of localization of approaching and withdrawing continuous and broken sound images
5. Age-dependent dynamic of sensitivity to androstenone in females
6. The reactions of the ensemble of the auditory nerve fibers in the growth of loudness and intensity discrimination of the efficient pulses presented before and after the disturb pulses

The article contains the first attempt to identify and compare the speech definitions of external objects features by the tactile (haptic) and visual perception in teenagers 12–15 years old with normal and impaired vision. Formation as a means of assessing the visual and tactile way has been selected as the system of representation, processing, storing and transmitting information. We used a visual test for the sighted and it tactile version for visually impaired and blind teenagers. Started guide, providing verbal description of the object, based on his study of tactile perception (touch). The criteria for evaluation of speech responses were used to describe a fragment of the external object. A comparison of the speech responses of impaired and sighted teenagers were obtained under different test conditions. Comparison of responses in subjects with normal and impaired vision showed that the tactile (haptic) perception of volume objects from the blind and visually impaired teenagers exposed to different interpretation than the visual image object in adolescents without visual impairment. Changing the visual modality to tactile perception have sighted teenagers by limiting their view, led to a substantial similarity of their responses to the responses of blind and visually impaired subjects. The question of the similarities and differences of the central mechanisms of forming the image of external objects in the visual and tactile perception among sighted and blind subjects is discussed. The results stressed the need for further research directed on evaluation function of touch, and reflected in the speech and stimulating the development of the imagination based on haptic perception of external objects.

Key words: haptic sense, touch, speech description of images, disturbance of vision

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