[Regularities of the egocentric spatial memory development in children aged 24-60 months].
2009
: In order to assess development of the egocentric system of the spatial short-term memory in children (n=66) of different ages (24-60 months) the Inverted Delayed Reaction test has been used. It was found that in the children aged 24-36 months regularities of performance of the Inverted Delayed Reaction test significantly differ in conditions of different loads onto the mechanisms of dead reckoning; the children aged 36-60 months do not show sensitivity to different loads. In children aged 42+/-4 months functional elimination of any of the sensory system (visual, kinesthetic, vestibular) during rotation significantly deteriorated results of the Inverted Delayed Reaction test performance, while in children aged 60+/-4 months number of correct responses decreased if two or three sensory systems were eliminated simultaneously. The data obtained permit to conclude that the Inverted Delayed Reaction test is sufficiently sensitive for evaluation development of the egocentric spatial memory system in children and that formation of the dead reckoning mechanisms starts in an age of 24 months and in the period of 24-60 months its further upgrading does occur.
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