Abstract

We examined the role of experience in affordance perception for low crawling with altered body dimensions under barriers of different heights. Adults decided which of five backpacks (10–30 cm thick) they would be able to wear while low crawling under barriers. Participants were assigned to one of three experience conditions. Participants in the Pre/Post-choice experience condition crawled under the barrier before and after picking a backpack, participants in the Feedback condition crawled under the barrier after picking a backpack, but participants in the No Experience condition received no low-crawling experience. Past research suggests that pre-choice experience with low crawling under the barrier would lead to more accurate responses. Overall, participants in all three conditions scaled the height of the backpack to the barrier height. Pre-choice low-crawling experience strongly influenced backpack choices such that participants in the Pre/Post condition picked significantly smaller backpacks and produced fewer failures than participants in the other conditions. The results provide evidence that brief practice, in an unfamiliar posture, can lead to improvements in affordance perception.

摘要

我们研究了在不同高度的障碍物下身体尺寸发生变化的低爬行情况下，在体验感知能力中的作用。由成年人决定，在低矮的障碍物下爬行时，可以使用五个背包（10–30厘米厚）中的哪个。参与者被分配到三个经验条件之一。选择前/选择后体验条件的参与者在选择背包前后在障碍物下爬行，在选择背包后，反馈条件的参与者在选择背包后爬行在障碍物下，但没有体验条件的参与者则没有低爬行条件。过去的研究表明，在障碍物下方爬行的选择前经验会导致更准确的响应。总体而言，在所有这三种情况下，参与者都将背包的高度调整为障碍物的高度。选择前的低爬行经验极大地影响了背包的选择，因此在其他条件下，处于“前/后”状态的参与者选择的背包明显较小，并且产生的故障更少。结果提供了证据，表明以不熟悉的姿势进行简短练习可以改善对支付能力的感知。