Gerrit Maus

People

The Whitney Laboratory

Department of Psychology

University of California, Berkeley

I'm a postdoc in David Whitney's Perception & Action lab in UC Berkeley's Psychology Department. My research focuses on predictive localization of objects in the visual system.


Predictive localization in the visual system

Every day we use our sense of vision to see and interact with our environment. Oftentimes, the things we want to interact with are moving (for example when we try to catch a ball) or we ourselves are moving (when walking or driving). It is essential to have accurate information about where things are to interact successfully with them. Despite our nervous system working with relatively slow "hardware", we excel at these tasks like no artificial system. It is not entirely understood how our brains achieve this.

Visual Illusions

A number of fascinating visual illusions demonstrate that the brain tries to compensate for delays in the input it receives from the eyes (and from other senses). For example in the flash-lag effect, a moving object that is perfectly aligned with a flash appears to be ahead in space. Here, the brain can predict the position of the moving object, but not that of the flash, and therefore we perceive mismatched positions.

In the flash-drag effect a stationary flash appears as "dragged" by nearby motion; physically aligned flashes are perceived as misaligned, when they are surrounded by motion in opposite directions. In this case, the flash is interpreted as part of the background motion, and its perceived location is biased by predictive localization. (See here for another powerful demo based on work by Anna Kosovicheva and Stuart Anstis.)

Research Methodologies

In my research in the Whitney Lab, I use behavioral experiments (psychophysics), brain imaging (fMRI), and transcranial magnetic stimulation (TMS) to try to unravel the mystery of visual localization in dynamic scenes. I am also collaborating with Richard Ivry on a project on predictive localization in patients with brain damage in the cerebellum, and with Stephen Heinen at the Smith-Kettlewell Eye Research Institute in San Francisco on predictive control of eye movements.


Brief Bio

As an undergraduate I studied Cognitive Science at the University of Osnabrück. I worked towards my DPhil with Romi Nijhawan at the University of Sussex in Brighton, UK. During this time I visited the Max Planck Institute for Brain Research in Frankfurt and collaborated with Lars Muckli on fMRI of the visual cortex. Since 2009, I have lived in California to work in David Whitney's lab, first at the Center for Mind and Brain at UC Davis, and now at UC Berkeley.


Publications

Maus, G.W., Chaney, W., Liberman, A., & Whitney, D. (2013) The challenge of measuring long-term positive aftereffects. Current Biology, 23(10): R438-439
Maus, G.W., Fischer, J., & Whitney, D. (2013) Motion-dependent representation of space in area MT+. Neuron, 78(3): 554-562
Maus, G.W., Ward, J., Nijhawan, R., & Whitney, D. (2013) The perceived position of moving objects: Transcranial magnetic stimulation of area MT+ reduces the flash-lag effect. Cerebral Cortex 23: 241-247
Kosowicheva, A.A., Maus, G.W., Anstis, S., Cavanagh, P., Tse, P.U., & Whitney, D. (2012). The motion-induced shift in the perceived location of a grating also shifts its aftereffect. Journal of Vision 12(8): 7.
Maus, G.W., Fischer, J., & Whitney, D. (2011). Crowding is based on perceived stimulus position. PLoS ONE 6(5): e19796.
Maus, G.W., Weigelt, S., Nijhawan, R., & Muckli, L. (2010). Does area V3A predict positions of moving objects? Frontiers in Psychology 1: 186.
Maus, G.W., Khurana, B., & Nijhawan, R. (2010). History and theory of flash-lag: past, present, and future. In R. Nijhawan & B. Khurana (eds.) Space and time in perception and action. Cambridge, UK: Cambridge University Press.
Banissy, M., Cohen Kadosh, R., Maus, G.W., Walsh, V., & Ward, J. (2009). Prevalence and characteristics of mirror-touch synaesthesia. Experimental Brain Research 198(2-3): 261-272.
Maus, G.W. & Nijhawan, R. (2009). Going, going, gone: Localizing abrupt offsets of moving objects. Journal of Experimental Psychology: Human Perception and Performance 35(3): 611-626.
Maus, G.W. & Nijhawan, R. (2008). Motion extrapolation into the blind spot. Psychological Science 19(11): 1087-1091.
Maus, G.W. (2007). Swimming with and against the stream: Does motor adaptation to lateral forces influence visual motion perception? Journal of Neuroscience, 27(49), 13367-13368.
Maus, G.W. & Nijhawan, R. (2006). Forward displacements of fading objects in motion: The role of transient signals in perceiving position. Vision Research 46(26): 4375-4381.

Contact

3210 Tolman Hall
University of California
Berkeley, CA 94720

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