The roles of non-temporal information processing load and temporal expectations in children's prospective time estimation.

Children in the pre-operational phase were asked to prospectively estimate the duration of a thirty-second interval. Estimated intervals were either filled by a task demanding non-temporal information processing, or were 'empty'. Children were either expecting a prize after the termination of the to-be-estimated interval, or were not expecting such a prize. Prospective time estimates were highest when a prize was expected and the to-be-estimated interval was 'empty', and lowest when a prize was not expected and the to-be-estimated interval was filled by the task. Accuracy was highest when a prize was expected and a non-temporal task required. These findings were accounted for by an attentional model of prospective time estimation. The similarity between children and adults' prospective time estimation processes was discussed.