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Perception ECVP 2010 Abstract Supplement gover imgeX ferggeist9 y ndro helEreteY opyright ndro helErete @wwwFsndrodelpreteFomA Perception, 2010, volume 39, supplement, page 1 – 203 Thirty-third European Conference on Visual Perception Lausanne, Switzerland 22 – 26 August 2010 Abstracts Sunday Posters: Face perception I 89 Symposium in honour of the late 1 Posters: Motion I 94 Richard Gregory Posters: Natural images 99 Perception Lecture (C Koch) 3 Posters: Objects and scenes 101 Monday Wednesday Talks: Attention 4 Talks: 3D Vision, depth 107 Talks: Adaptation, Brightness 6 Symposium: The complexity of visual 110 and Contrast stability Symposium: Face perception in man 9 Symposium: Psychophysics: 112 and monkey yesterday, today, and tomorrow Talks: Objects 10 Posters: Art and vision 113 Symposium: Colour appearance 12 Posters: Attention II 117 mechanisms Posters: Consciousness and rivalry 123 Talks: Neural mechanisms 14 Posters: Face perception II 125 Posters: Applied vision 16 Posters: Haptics 130 Posters: Biological motion 18 Posters: Imaging 133 Posters: Clinical vision and ageing 20 Posters: Motion II 137 Posters: Contours and crowding 25 Posters: Multisensory processing 142 Posters: Emotions and cognition 30 Posters: Reading 147 Posters: Eye movements I 33 Posters: Learning and memory 38 Thursday Posters: Models and theory 44 Talks: Motion 150 Posters: Non-human vision 49 Talks: Multistability, rivalry 152 Posters: Perception and action I 50 Talks: Face perception 155 Talks: Colour 157 Tuesday Posters: 3D Vision, depth II 160 Talks: Eye movements 55 Posters: Brightness, lightness 165 Talks: Clinical vision 57 Posters: Contrast 168 Talks: Spatial vision 60 Posters: Eye movements II 170 Talks: Learning and memory 62 Posters: Illusions 174 Symposium: Visual social perception: 64 Posters: Perception and action II 180 Brain imaging and sex differences Posters: Perceptual organization 184 Talks: Multisensory processing 66 Posters: Temporal processing 187 and haptics Posters: Visual search 191 Rank Lecture 68 Publisher’s note. Posters: 3D vision, depth I 68 In the interests of efficiency, these abstracts have Posters: Adaptation, aftereffects 74 been reproduced as supplied by the Conference with Posters: Attention I 78 little or no copy editing by Pion. Thus, the English and style may not match those of regular Perception Posters: Colour 84 articles. Organiser Michael Herzog Local Committee Gijs Plomp Laure Dayer Silvia Marchesotti Valerie´ Jacot-Descombes Marc Repnow Scientific Committee Talis Bachmann Joseph Krummenacher Anton Beer Gunter¨ Meinhardt Eli Brenner Marino Menozzi Emanuela Bricolo Michael Morgan Anna Brooks Thomas Papathomas Isabelle Bulthoff¨ Galina Paramei Claus-Christian Carbon Baingio Pinna Patrick Cavanagh Gregor Rainer Heiner Deubel Brian Rogers Casper Erkelens Bettina Rolke Manfred Fahle Takao Sato Jozsef Fiser Thomas Schmidt Sergei Gepshtein Robert O’Shea Tandra Ghose Claudio de’Sperati Alan Gilchrist Hans Strasburger Mark W. Greenlee Ian Thornton Elisabeth Hein Simon Thorpe Sven Heinrich Frans Verstraten Frouke Hermens Thomas Wachtler Robert Hess Johan Wagemans Todd Horowitz Andrew Watson Anya Hurlbert Sophie Wuerger Alumit Ishai Qasim Zaidi Astrid Kappers Johannes Zanker Dirk Kerzel Li Zhaoping Akiyoshi Kitaoka Supporting organisations Canton de Vaud (www.vd.ch) Cooperation@epfl (cooperation.epfl.ch) ECVP 2008 (www.fss.uu.nl/psn/web/people/projects/ECVP2008/) ECVP 2009 (www.ecvp2009.org) F. Hoffmann-La Roche AG (www.roche.ch) Merck Serono SA (www.merckserono.net) Novartis Pharma AG (www.novartis.ch) Optical Society of America (www.osa.org) Pion Ltd (www.pion.co.uk) Swiss National Science Foundation (SNSF) (www.snf.ch) The City of Lausanne (www.lausanne.ch) The Rank Prize Funds (www.rankprize.org) The European Conference on Visual Perception is an annual event. Previous conferences took place in: 1978 Marburg (D) 1988 Bristol (GB) 2001 Kus¸adasi (TR) 1979 Noordwijkerhout (NL) 1989 Zichron Yaakov (IL) 2002 Glasgow (GB) 1980 Brighton (GB) 1990 Paris (F) 2003 Paris (F) 1981 Gouvieux (F) 1994 Eindhoven (NL) 2004 Budapest (H) 1982 Leuven (B) 1995 Tubingen¨ (D) 2005 A Coruna˜ (E) 1983 Lucca (I) 1996 Strasbourg (F) 2006 St Petersburg (RU) 1984 Cambridge (GB) 1997 Helsinki (FI) 2007 Arezzo (I) 1985 Peniscola˜ (E) 1998 Oxford (GB) 2008 Utrecht (NL) 1986 Bad Nauheim (D) 1999 Trieste (I) 2009 Regensburg (D) 1987 Varna (BG) 2000 Groningen (NL) © Copyright 2010 a Pion publication printed in Great Britain Symposium in honour of the late Richard Gregory 1 Sunday ECVP 2010 Abstracts Sunday SYMPOSIUM IN HONOUR OF THE LATE RICHARD GREGORY ◆ Richard and randomness drove my research S Anstis (University of California, San Diego (UCSD), USA; e-mail: [email protected]) In the mid-20th century, Richard was working on motion perception, so I, his first graduate student, did likewise. First, using a rotating kymograph drum, a xerox of Bela Julesz’ first random-dot patterns, and a stroboscope, I failed to discover Dmax. (Ol Braddick succeeded in discovering that later.) Then, using some fluorescent tubes driven by a home-made power pack, I failed to make a power stroboscope, but I stumbled across a ramp aftereffect, which I published in Science. Encouraged, but only faintly, by Richard, I discovered reversed phi by putting the wrong slides into a projector. Inspired by Richard’s declaring that my PhD. thesis was ‘surprisingly good’, I went on to stumble across the footsteps illusion, the chopsticks illusion, four-stroke cycle motion, crossover motion, zigzag motion; and I have been stumbling on ever since. Richard has helped me to demonstrate that fortune favours the prepared mind (Pasteur) and also the unprepared mind (Anstis). Thank you, Richard. ◆ All jazzy. Gregorian explorations of pure colour P Cavanagh (Université Paris Descartes, France; e-mail: [email protected]) Like many of us, I was captured, enthralled, and enslaved by Richard Gregory the first time I heard him speak. He showed us how faces melt into indecipherable islands of colour when presented at ‘isoluminance’. Inspired by Richard’s flapping eyebrows, his big smile and a laugh that boasted of the fun of vision research, I joined legions of others abandoning their plodding first careers and became a vision scientist. Richard had shown us how to use filters in front of a slide projector to adjust the red to green luminance and find the treasured ‘Critical Zone’ of equal luminance, where all turned to jelly, uncovering after 60 years the pioneering Gestalt discoveries of perceptual losses and the slowing of motion. For Richard’s Gregory Fest in Bristol, we built Big Chroma, the world’s largest equiluminant display with real people walking through a world of pure colour like bugs through yellow molasses. It was—just as had Richard promised—magic. I will show Richard’s first demonstrations of perception at ‘isoluminance’ using where possible his original equipment. ◆ The continuing story of colour, form, and motion T Troscianko (University of Bristol, UK; e-mail: [email protected]) The selection procedure for my first postdoc job, with Richard Gregory, consisted of Richard showing me the apparatus which he and Rama were using to show random-dot motion at isoluminance, and asking me what I thought of the experiment. I said it was great which, apparently, was the correct answer and I got the job—to work on auditory perception. Richard’s paper with Rama was published in Nature (1978 Nature 275 55-56) and the effect (loss of motion at isoluminance) was compelling. However, nobody reading that paper could make the slightest sense of the numerical data and suspicious minds claimed that the effect was unproven. So I set about doing it ‘properly’ (ie slowly) and nine years later the effect was replicated and extended in my paper (1987 Vision Research 27 547-554). This showed that although form-from-motion is not supported by isoluminant displays, the same displays are very good at supporting the perception of (static) symmetry. This should have been the end of the story but a paper cropped up in Nature (1999 Nature 399 115-116) and claimed that colour does not support symmetry perception. I shall show data, from a study with Innes Cuthill, that this latest argument is nonsense and Richard showed me the right path. For that, and everything else, I thank him. 2 Symposium in honour of the late Richard Gregory Sunday ◆ A dissociation between perception and action unmasked by the hollow-face illusion M A Goodale1, G Króliczak2, P Heard3, R L Gregory4 (1University of Western Ontario, Canada; 2University of Oregon, USA; 3University of the West of England, UK; 4University of Bristol, UK; e-mail: [email protected]) Richard Gregory was fascinated with the hollow-face illusion, in which a hollow mask looks like a normal convex face. He often used this illusion to illustrate the influence of top-down processing on perception. During a long discussion over a coffee in Budapest some years ago, Richard and I resolved to use the hollow-face illusion to unmask a possible dissociation between vision-for-perception and vision-for-action. Together with Priscilla Heard and Greg Króliczak, we carried out an experiment in which we contrasted perceptual judgments about the hollow face with fast actions directed at targets on the face. Participants estimated the positions of small targets placed on the actually hollow but apparently normal face and used their fingers to ‘flick’ the targets off. Despite the presence of a compelling illusion of a normal face, the flicking movements were directed at the real, not the illusory locations of the targets. These results show that the same visual stimulus can have completely opposite effects on conscious perception and visual control of fast action. ◆ Virtual hollow masks B Rogers (University of Oxford, UK; e-mail: [email protected]) Experiments using hollow faces and other objects have shown that there is both a specific effect of face stimuli per se and a more general effect of convexity/concavity in the depth reversal of hollow objects (Hill and Johnston, 2007 Perception 36 199-223; Króliczak, Heard, Goodale, Gregory, 2006 Brain Research 1080 9-16).
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