The relationship between sustained attention and cognitive performance in 17-24-month old toddlers

The purpose of this study was to investigate individual differences in sust ained attention and task performance with toddlers. Participants were 61 17 -24-month old toddlers. Indices of sustained attention (duration of attenti on and frequency of off-task glances) were assessed during two 4 min proble m solving tasks, and then related to problem solving and the mental scale o f the Bayley scales of infant development-II (BSID-II). As expected, toddle rs who attended to tasks for longer periods of time were more successful at problem solving, and had higher scores on the BSID-II than toddlers who at tended for shorter periods of time. In addition, older toddlers had longer attention spans, more frequent off-task glances, and were more successful a t problem solving than younger toddlers. Interestingly, toddlers with more frequent off-task glances had longer attention spans, were more successful at problem solving, and had higher BSID-II scores than peers with fewer off -task glances. These findings suggest that although behavioural indices can be used to identify sustained attention, the relationship between behaviou rs thought to capture distractibility and attention is more complex than ha d been previously assumed. Results are discussed in the context of current theories of infant attention and cognitive performance. Copyright (C) 2000 John Wiley & Sons, Ltd.