TY  - JOUR
PY  - 2012//
TI  - Saccade Preparation Is Required for Exogenous Attention but Not Endogenous Attention or IOR
JO  - Journal of experimental psychology: human perception and performance
A1  - Smith, Daniel T.
A1  - Schenk, Thomas
A1  - Rorden, Christopher
SP  - 1438
EP  - 1447
VL  - 38
IS  - 6
N2  - Covert attention is tightly coupled with the control of eye movements, but there is controversy about how tight this coupling is. The premotor theory of attention proposes that activation of the eye movement system is necessary to produce shifts of attention. In this study, we experimentally prevented healthy participants from planning or executing eye movements and observed the effect on exogenous attention, inhibition of return (IOR), and endogenous attention. The participants experienced a deficit of exogenous attentional facilitation that was specific to locations that were inaccessible by saccade. In contrast, their ability to endogenously orient attention was preserved, as was IOR. These results show that (a) exogenous attention depends on motor preparation, (b) IOR is independent of motor preparation and exogenous attention, and (c) endogenous attention is independent of motor preparation. Although these data are consistent with a weak version of the premotor theory, we believe they can be better explained by a biased competition account of visual attention. (PsycINFO Database Record (c) 2012 APA, all rights reserved).<p /> <p>Language: en</p>
LA  - en
SN  - 0096-1523
UR  - http://dx.doi.org/10.1037/a0027794
ID  - ref1
ER  -