TY - JOUR
T1 - Perceiving affordances for different motor skills
AU - Cole, Whitney G.
AU - Chan, Gladys L Y
AU - Vereijken, Beatrix
AU - Adolph, Karen E.
N1 - Funding Information:
Acknowledgments The project described was supported by Award Number R37HD033486 from the National Institute of Child Health & Human Development. We thank Danielle Bendicksen for her help in designing procedures, running participants, and coding data. We thank Gregory Murphy and John Franchak for helpful comments on the manuscript.
PY - 2013/3
Y1 - 2013/3
N2 - We examined several factors that affect people's ability to perceive possibilities for action. In Experiment 1, 24 participants crossed expanses of various sizes in three conditions: leaping, a familiar, launching action system; arm-swinging on monkey bars, an unpracticed skill that uses the arms rather than the legs; and crawling on hands and knees, a disused skill that involves all four limbs. Before and after performing each action, participants gave verbal judgments about the largest gap they could cross. Participants scaled initial judgments to their actual abilities in all three conditions. But they considerably underestimated their abilities for leaping, a launching action, and for arm-swinging when it was performed as a launching action; judgments about crawling, a non-launching action, and arm-swinging when it was performed as a non-launching action were more accurate. Thus, launching actions appear to produce a deficit in perceiving affordances that is not ameliorated by familiarity with the action. However, after performing the actions, participants partially corrected for the deficiency and more accurately judged their abilities for launching actions - suggesting that even brief action experience facilitates the perception of affordances. In Experiment 2, we confirmed that the deficit was due to the launching nature of the leaping and arm-swinging actions in Experiment 1. We asked an additional 12 participants to cross expanses using two non-launching actions using the legs (stepping across an expanse) and the arms (reaching across an expanse). Participants were highly accurate when judging affordances for these actions, supporting launching as the cause of the underestimation reported in Experiment 1.
AB - We examined several factors that affect people's ability to perceive possibilities for action. In Experiment 1, 24 participants crossed expanses of various sizes in three conditions: leaping, a familiar, launching action system; arm-swinging on monkey bars, an unpracticed skill that uses the arms rather than the legs; and crawling on hands and knees, a disused skill that involves all four limbs. Before and after performing each action, participants gave verbal judgments about the largest gap they could cross. Participants scaled initial judgments to their actual abilities in all three conditions. But they considerably underestimated their abilities for leaping, a launching action, and for arm-swinging when it was performed as a launching action; judgments about crawling, a non-launching action, and arm-swinging when it was performed as a non-launching action were more accurate. Thus, launching actions appear to produce a deficit in perceiving affordances that is not ameliorated by familiarity with the action. However, after performing the actions, participants partially corrected for the deficiency and more accurately judged their abilities for launching actions - suggesting that even brief action experience facilitates the perception of affordances. In Experiment 2, we confirmed that the deficit was due to the launching nature of the leaping and arm-swinging actions in Experiment 1. We asked an additional 12 participants to cross expanses using two non-launching actions using the legs (stepping across an expanse) and the arms (reaching across an expanse). Participants were highly accurate when judging affordances for these actions, supporting launching as the cause of the underestimation reported in Experiment 1.
KW - Affordances
KW - Human locomotion
KW - Motor action
KW - Perception-action links
KW - Visual perception
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U2 - 10.1007/s00221-012-3328-9
DO - 10.1007/s00221-012-3328-9
M3 - Article
C2 - 23411672
AN - SCOPUS:84877013398
SN - 0014-4819
VL - 225
SP - 309
EP - 319
JO - Experimental Brain Research
JF - Experimental Brain Research
IS - 3
ER -