Systematic Movements in Haptic Search: Spirals, Zigzags, and Parallel Sweeps.
Identifieur interne : 000516 ( Main/Exploration ); précédent : 000515; suivant : 000517Systematic Movements in Haptic Search: Spirals, Zigzags, and Parallel Sweeps.
Auteurs : Valerie MorashSource :
- IEEE transactions on haptics [ 2329-4051 ] ; 2015.
Abstract
Movement strategies were investigated in a one-handed haptic search task in which blindfolded-sighted participants used either one or five fingers to find a landmark on an unstructured tactile map. Search theory predicts that systematic strategies, such as spirals, zigzags, and parallel sweeps, should be more prevalent when the searcher's detection radius is small (one finger) and less common when the detection radius is large (five fingers). As predicted, systematic strategies were more common in one-finger than five-finger search. Participants were able to exploit the larger detection radius during five-finger search to detect targets with any of their fingers, and in one-finger search used more systematic strategies. For the most part, participants' fingers moved together during five-finger search, expanding and moving quickly when looking for search targets/distractors, and contracting and moving slowly when examining search targets/distractors. There was no evidence of fingers being used as spatial anchors or other independent finger movements in five-finger search. While targets could be found with any fingers, examination was primarily accomplished using the index and middle fingers. Overall, these results indicate that untrained sighted participants will use optimal systematic strategies during haptic search, and this behavior is appropriately modulated by detection radius.
DOI: 10.1109/TOH.2015.2508021
PubMed: 26685263
Affiliations:
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