The Experimental Research On The Feature Of Time Perception In Mental Retarded Children

An important issue in cognitive psychology concerns time perception. Since the 1960s and 1970s, studying time perception has reached a peak along with the introduction of information processing and the production of cognitive psychology. Many researchers focus on the cognitive processing of time perception and the impact of related experimental paradigm and methods on its research. The research methods for time perception can be divided into two types, temporal succession and temporal duration according to the definition of time perception. Whether the study on temporal succession or temporal duration already has had abundant results. However, it is important to note that the related research was mostly conducted with normal children and adults. Therefore, it is necessary to conduct studies with exceptional children, especially Mental Retarded children. The present study fills the domestic gap in studying MR children, offer pathological basis for MR children's impair of time perception and supply effective information for education.Based on the study, the paper concluded that:(1)It is better for MR children's simple serial recalling in multiple modalities than in single modality. MR children perform better on the recalling the number and the picture serially than the letter. (2)For MR children, recalling the latter ones is better than the former ones, which showed the phenomenon of recency effect. In MR children's complicated serial recalling, there is significant difference in recalling the stimulus at different positions. Not only recency effect but also primacy effect is obtained. (3)Moreover, there is significant age effect both in simple and complicated temporal succession information processing. MR children's ability of temporal succession information processing developed with the growth of age. (4)MR children's complicated serial recalling show the interactive effect of location and stimulus presentation. More remarkable recency effect is obtained in the visual stimulus presentation while more remarkable primacy effect is obtained in the audio stimulus presentation. (5)In the estimation of duration, MR children show auditory-visual modality effect. Estimating duration in audio stimulus is more accurate than in visual stimulus. Estimating duration in cross model is inaccurate. Estimating duration in multiple modalities is more accurate than single modality. (6)In addition, there is significant difference in single and multiple modalities, while not in cross modality in different age groups. MR children's ability of estimation of duration improved along with the growth of age. MR children's ability of estimation of duration improved rapidly between the age 10 and 12. (7)Both the minimum quantity of deciding "long" and the maximum quantity of deciding "short" increase with the growth of the individual's age. Especially, there's significant difference in elder group and the younger group. The younger group group's concept of "long duration or short duration" is not very clear. MR children's "long duration or short duration" concept develops rapidly during the age 13-15, which is also the elder group.