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Are two hands (from different people) better than one? Mode effects and differential transfer between manual coordination modes.

Abstract：

OBJECTIVE:We report an experiment in which we investigated differential transfer between unimanual (one-handed), bimanual (two-handed), and intermanual (different peoples' hands) coordination modes. BACKGROUND:People perform some manual tasks faster than others ("mode effects"). However, little is known about transfer between coordination modes. To investigate differential transfer, we draw hypotheses from two perspectives--information based and constraint based--of bimanual and interpersonal coordination and skill acquisition. METHOD:Participants drove a teleoperated rover around a circular path in sets of two 2-min trials using two of the different coordination modes. Speed and variability of the rover's path were measured. Order of coordination modes was manipulated to examine differential transfer and mode effects. RESULTS:Differential transfer analyses revealed patterns of positive transfer from simpler (localized spatiotemporal constraints) to more complex (distributed spatiotemporal constraints) coordination modes paired with negative transfer in the opposite direction. Mode effects indicated that intermanual performance was significantly faster than unimanual performance, and bimanual performance was intermediate. Importantly, all of these effects disappeared with practice. CONCLUSION:The observed patterns of differential transfer between coordination modes may be better accounted for by a constraint-based explanation of differential transfer than by an information-based one. Mode effects may be attributable to anticipatory movements based on dyads' access to mutual visual information. APPLICATION:Although people may be faster using more-complex coordination modes, when operators transition between modes, they may be more effective transitioning from simpler (e.g., bimanual) to more complex (e.g., intermanual) modes than vice versa. However, this difference may be critical only for novel or rarely practiced tasks.

journal_name

Hum Factors

journal_title

Human factors

authors

Gorman JC,Crites MJ

doi

10.1177/0018720812472189

subject

Has Abstract

pub_date

2013-08-01 00:00:00

pages

815-29

issue

eissn

0018-7208

issn

1547-8181

journal_volume

pub_type

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Are two hands (from different people) better than one? Mode effects and differential transfer between manual coordination modes.