Learning to detect but not to grasp suppressed visual stimuli
Learning to detect but not to grasp suppressed visual stimuli
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学习检测但不掌握被抑制的视觉刺激
DOI:
10.1016/j.neuropsychologia.2013.09.035
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发表时间:
2013
期刊:
影响因子:
2.6
通讯作者:
Hesselmann
中科院分区:
文献类型:
--
作者:
Ludwig;Kathmann;Sterzer;Hesselmann
A central implication of the two-visual-systems hypothesis (TVSH) is that the dorsal visuomotor system (vision-for-action) can make use of invisible information, whereas the ventral system (vision-for-perception) cannot (Milner & Goodale, 1995). Therefore, actions such as grasping movements should be influenced by invisible information while conscious reports remain unaffected. To test this assumption, we used a dichoptic stimulation technique – continuous flash suppression (CFS) – which has the potency to render stimuli invisible for up to seconds (Tsuchiya & Koch, 2005). In two experiments using CFS, participants were asked to grasp for invisible bars of different sizes (Experiment 1) or orientations (Experiment 2), or to report both measures verbally. Target visibility was measured trial-by-trial using the perceptual awareness scale (PAS). We found no evidence for the use of invisible information by the visuomotor system despite extensive training (600 trials) and the availability of haptic feedback. Participants neither learned to scale their maximum grip aperture to the size of the invisible stimulus, nor to align their hand to its orientation. Careful control of stimulus visibility across training sessions, however, revealed a robust tendency towards decreasing perceptual thresholds under CFS. We discuss our results within the framework of the TVSH and with respect to alternative models which emphasize the close functional interaction between the dorsal and ventral visual systems.
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影响因子:
3.2
作者:
Kiefer, Markus;Sim, Eun-Jin;Graf, Markus
通讯作者:
Graf, Markus
影响因子:
2
作者:
J. Marotta;M. Behrmann;M. Goodale
通讯作者:
M. Goodale
DOI:
--
发表时间:
1981
期刊:
Attention and Performance
影响因子:
--
作者:
M. Jeannerod
通讯作者:
M. Jeannerod
影响因子:
2.6
作者:
Bingham, Geoffrey;Coats, Rachel;Mon-Williams, Mark
通讯作者:
Mon-Williams, Mark
影响因子:
1.8
作者:
D. Westwood;M. Goodale
通讯作者:
M. Goodale