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Bimanual Coupling in Left and Right Space: Which Hand Is Yoked to Which?
Vision Sciences Society (VSS) Meeting (2008)
  • Gavin Buckingham, University of Aberdeen
  • Gordon Binsted, University of Aberdeen
  • David P. Carey, University of Aberdeen

• Reaching across the body into contralateral space with one hand incurs a substantial cost on various measures of performance, compared to ipsilateral reaches of a similar amplitude (Carey, Hargreaves, & Goodale, 1996).

• When reaching with both hands, unimanual asymmetries disappear.

-The hands take off and land concurrently (Kelso, Southard, & Goodman, 1979).

• To test if this ‘yoking’ is driven by the left or the right hand, participants performed reaches of different amplitudes.

• These reaches were made to the left or right side of space.

-Further increasing the unimanual (baseline) asymmetries that get wiped out by the yoking.

• The hand which is less affected by the other’s presence is likely to be driving the coupling.

• The strongest conclusions could be drawn from a relative improvement of a contralateral reaching hand, by the presence of an ipsilateral reaching counterpart.

  • Bimanual coupling
Publication Date
Citation Information
Gavin Buckingham, Gordon Binsted and David P. Carey. "Bimanual Coupling in Left and Right Space: Which Hand Is Yoked to Which?" Vision Sciences Society (VSS) Meeting (2008)
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