Contents:
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volume 1 issue 1, pages 1-7 |
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Face adaptation: Changing stable representations of familiar faces within minutes? |
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Claus-Christian Carbon and Helmut Leder |
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1 Department of Psychological Basic Research, University of Vienna, Austria
2 Institute of Cognitive and Biological Psychology, Freie Universität Berlin, Germany
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Three experiments are reported showing that the perception and the assessment of veridicality
of familiar faces are highly adaptive to new visual information. Subjects were asked to discriminate
between real photographs and altered versions of celebrities. Exposing participants to extremely deviated versions changed the usually
stable representations of the famous faces within a very short time. In Experiment 1, exposure
to an extreme face version resulted in identity
decisions shifted towards the exposed one. Experiment 2 revealed that the effects are not short lasting. In Experiment 3, we showed that the effect also generalizes to different pictures of the same famous person. Together the experiments
seem to indicate that the brain permanently
adapts to new perceptual information and integrates new data within already elaborated representations in a fast way.
Keywords: face recognition, face representation, adaptation effect, learning, memory
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Annabelle Blangero, Yves Rossetti, Jacques Honoré, and Laure PisellaInfluence of gaze direction on pointing to
unseen proprioceptive targets
[download pdf]
, [abstract (show/hide)]
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volume 1 issue 1, pages 9-16 |
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Influence of gaze direction on pointing to
unseen proprioceptive targets |
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Annabelle Blangero, Yves Rossetti, Jacques Honoré, and Laure Pisella |
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1Espace et Action, UMR INSERM Unité 534,
Institut National de la Santé Et de la Recherche Médicale -
Université
Claude Bernard Lyon I, 16 avenue Lépine, Case 13, 69676 Bron -
France
2 Institut Fédératif des Neurosciences de Lyon: Hôpital
Neurologique, Lyon - France
3 Service de Rééducation Neurologique, Hôpital Henry Gabrielle,
Hospices Civils de Lyon, Route de Vourles,
St Genis Laval - France
4 Laboratoire de Neurosciences du Comportement, Université de
Lille1, France
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The question of how sensory information is encoded
and integrated for goal-directed movements
is a major topic in action research. Here
we studied the influence of the direction of gaze
on a task in which healthy individuals were required
to point to their own unseen fingertip. An
effect of the position of gaze on pointing, leading
to pointing errors in the direction opposite to the
gaze position, was obtained in the range of 11°
but vanished for 22°. These results suggest that
targets of aiming movements performed with an
unseen arm may be encoded in retinal coordinates
even when the target is encoded in a nonvisual
modality and remains unseen.
Keywords: gaze, pointing, proprioceptive, retinal coordinates, sensori-motor
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