Using economic theory to understand children's risky visuomotor decisions

点击翻译按钮获取中文摘要

In playgrounds, traffic and around the house, we are at continuous risk of bodily injury. Children are particularly accident-prone, as reflected in the disproportionally high accident-rates of pedestrians aged 15 year and younger. In recent years many researchers, including myself, have made considerable strides in understanding how visuomotor abilities improve across development. Despite these advances in understanding, current approaches do not consider how children adjust for their changing abilities to avoid unnecessary bodily risk during everyday visuomotor decisions. For example, children are less efficient than adults at avoiding incoming traffic when crossing busy roads. Do they account for this correctly by waiting for larger gaps between cars before crossing?Economic decision-making theories will be employed to model children's visuomotor choices. Economists identify the best financial investments by trading-off probabilities of positive and negative monetary outcomes. Likewise, such tactics can identify the best movement strategy (e.g., when to cross) that maximises safety and efficiency (e.g., avoids accidents but utilises safe gaps in traffic). This has proven very effective for modelling mature visuomotor behaviour, showing that adults often choose movements that optimise performance. Recently I pioneered this approach with children, showing that children aged 6 to 11 years make riskier visuomotor choices than adults during manual reaching. To understand and reduce the effects of risky action selection on childhood injury, we must characterise more broadly how visuomotor decision-making develops, and understand which neurocognitive processes drive this change. A combination of precise behavioural tests, mathematical modelling and neuroimaging will be used to address these fundamental questions.This proposal consists of 3 main objectives that each form a necessary step towards understanding children's movements under real risk in real world situations; These are to (1) characterise children's risky visuomotor decisions in realistic circumstances, including whole-body movements and poor eye-sight, (2) identify which basic mental processes underlie children's immature visuomotor choices, and (3) investigate how these might be improved through training. By characterising changes in visuomotor decision-making in detail at the behavioural and neural level, these objectives will significantly advance our understanding of the developing visuomotor system in action and the mechanisms of visuomotor decision-making. Moreover, this project has great translational potential for improving childhood safety and well being in everyday life, by informing educational programs and generating new ideas for interventions to improve safety.