Human binocular vision, stereopsis, motion perception and perception of visual illusions. Perception of music.

I am trained in the field of psychobiology and visual neuroscience. The basic method that I use to study human visual perception is psychophysics, which relates the subjective human psychological experience with the physical characteristics of visual stimuli. I also study human vision using visually evoked cortical potentials (VECPs) which is an objective, electrophysiological method that complements psychophysics.

Honors & Awards

1994 Referee
Vision Research

1990 - 1991 Research Fellowship
Department of Psychology, Florida State University

1983 - 1989 Psychobiology/Neuroscience Program Fellowship
Florida State University

Refereed Publications

Anstis, S. & Ho, A. (1998) Nonlinear Combination of Luminance Excursions During Flicker, Simultaneous Contrast, Afterimages and Binocular Fusion. Vision Res. 38: 523-539

Ho, W. A. & Berkley, M. A. (1988) Evoked potential estimates of the time course of adaptation and recovery to counterphase gratings. Vision Res. 28, 1287-1296

Presentations

Ho, W. A. & I. P. Howard (1995) Stereopsis from centroid disparity. Invest. Ophthalmol. Vis. Sci. 36: S813

Ho, W. A. & I. P. Howard (1994) Depth Perception from contrast-gradient disparity. Conference on Stereopsis, Tubingen. 310

Ho, Alan (1993) Anomalous stereopsis from overall aniseikonia. Binocular Stereopsis and Optic Flow Conference and NATO Advanced Workshop. Toronto, Canada

Ho, Alan & Anstis, Stuart (1993) Motion correspondence in ambiguous AM Stimuli measures subjective Distances. Invest. Ophthalmol. Vis. Sci. 34: S1031

Anstis, S. M. & Ho, W. A. (1993) Flickering test field enhances simultaneous brightness induction. Invest. Ophthalmol. Vis. Sci. 34: S706

Ho, Alan (1992) Ramping-luminance bars give ambiguous apparent motion. Invest. Ophthalmol. Vis. Sci. 33: S1140

Anstis, Stuart & Ho, Alan (1992) Wriggly lines appear gradually to straighten during steady fixation. Invest. Ophthalmol. Vis Sci. 33: S957

Ho, W. A. & Berkley, M. A. (1991) Interactions between channels as revealed by ambiguous motion stimuli, Invest. Ophthalmol. Vis. Sci. 32: S799

Ho, W. A. & Berkley, M. A. (1990) Pattern motion processing in binocular fusion of two 2-D plaids. Society for Neuroscience Abstract

Ho, W. A. & Berkley, M. A. (1990) An integrative mechanism for dichoptic global coherent motion perception. Invest. Ophthalmol. Vis. Sci. 31: S521

Ho, W. A. & Berkley, M. A. (1989) Dichoptic perception of coherent 2-D plaid movement is spatial frequency dependent. Invest. Ophthalmol. Vis. Sci. 30: S75

Ho, W. A. & Berkley, M. A. (1985) The characteristics and time course of adaptation to gratings as estimated from evoked potentials. Society for Neuroscience Abstract

Unpublished Manuscripts

Anstis, S. & Ho, A. (1992) Visual Perception with Night Vision Goggles (NVG). A technical report submitted to the Canadian Department of Civil & Environmental Medicine (DCIEM) on Contract # W7711-1-71-21/02-XSE awarded to Stuart Anstis.

Ho, W. A. (1989) Perception of Apparent Motion in the 2-Dimensional Plane (A critical literature review submitted to the F.S.U. Department of Psychology as partial requirement for the doctoral preliminary examination).

Invited Presentations

2004 A Neurological Review on Multiple Intelligence I & II

Chinese Gospel Broadcasting Corporation, Toronto, Ontario, Canada

2003 Creative Learning Workshops

Little Big Art School, Markham, Ontario, Canada

1993 Anomalous Stereoscopic Perception from Aniseikonia

School of Optometry, University of Waterloo, Ontario, Canada

Local Colloquium Presentations

1992 From Luminance to Motion

UCSD, California, USA

1991 Interactions between Channels as Revealed by Ambiguous Motion Stimuli

UCSD, California, USA

1990 A Spatial Frequency Analysis on Binocular Fusion and Rivalry

FSU, Florida, USA

1989 Mechanisms for Perception of Short Range Apparent Motion

FSU, Florida, USA

1988 Perception of Apparent Motion in the Frontoparallel Plane

FSU, Florida, USA

1985 Dynamics of Adaptation to Gratings as Estimated from Human Evoked Potential Technique,

FSU, Florida, USA