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Perceiving action boundaries for overhead reaching in a height-related situation
Attention, Perception, & Psychophysics ( IF 1.7 ) Pub Date : 2021-03-29 , DOI: 10.3758/s13414-021-02293-2
Lisa P. Y. Lin , Sally A. Linkenauger

To successfully interact within our environment, individuals need to learn the maximum extent (or minimum) over which they can perform actions, popularly referred to as action boundaries. Because people learn such boundaries over time from perceptual motor feedback across different contexts, both environmental and physiological, the information upon which action boundaries are based must inherently be characterised by variability. With respect to reaching, recent work suggests that regardless of the type of variability present in their perceptual-motor experience, individuals favoured a liberal action boundary for horizontal reaching. However, the ways in which action boundaries are determined following perceptual-motor variability could also vary depending on the environmental context as well as the type of reach employed. The present research aimed to established whether the perceptual system utilises the same strategy for all types of reaches over different contexts. Participants estimated their overhead reachability following experience reaching with either a long or a short virtual arm, or a virtual arm that varied in length – while standing on the edge of a rooftop or standing on the ground. Results indicated that while similar strategies were used to determine action boundaries in both height- and non-height-related context, participants were significantly more conservative with their reachability estimates in the height-related context. Participants were sensitive to the probabilistic information associated with different arm’s reach they have experienced during the calibration phase, and used a weighted average of reaching experience to determine their action boundary under conditions of uncertainty.



中文翻译:

感知动作边界,以在与高度相关的情况下达到开销

为了在我们的环境中成功进行交互,个人需要学习他们可以执行动作的最大范围(或最小范围),通常被称为动作边界。由于人们会随着时间的推移从环境和生理等不同情境下的感知运动反馈中学习此类边界,因此,行为边界所基于的信息必须固有地具有可变性。关于触及,最近的工作表明,无论他们的知觉-运动经验中存在何种类型的变异性,个人都倾向于在横向触及中采取自由行动的界限。但是,根据感知运动变化来确定动作边界的方式也可能会根据环境情况以及所采用的到达类型而有所不同。本研究旨在确定感知系统是否针对不同情境下的所有类型的触角采用相同的策略。参与者估计了他们的开销开销,这是因为他们站在屋顶边缘或地面上时,用长或短的虚拟手臂或长度变化的虚拟手臂进行接触。结果表明,虽然相似的策略被用于确定与身高相关的和与身高无关的情境中的动作边界,但参与者在与身高相关的情境中其可达性估计值明显更保守。参与者对与他们在校准阶段遇到的不同手臂接触范围相关的概率信息敏感,

更新日期:2021-03-29
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