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A toddler temperament questionnaire was completed by the mothers of fifteen Down's syndrome children who had been assessed two years earlier with the Carey infant temperament questionnaire. The results suggest that infants who have been scored as showing signs of difficult temperament move towards the easier signs on the toddler scale. If these temperament questionnaires are biased by maternal perceptions, this move may reflect a reduced level of maternal anxiety.
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Gunn et al. (1983) studied this question.
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