Vision and Attention Laboratory

Research Overview

Work in our Laboratory seeks to explain how colour, motion, and attentional mechanisms operate within the visual system. We employ a diverse range of approaches including behavioral psychophysics, computational modeling, and electrophysiology.

Staff

Margaret E Webb, PhD Student
Dr David K Sewell, Postdoctoral Research Fellow
Dr Simon James Cropper

Research Publications

Prof Phillip Smith

  • Sewell, D. K., & Smith, P. L. (in press). Attentional control in visual signal detection: Effects of abrupt-onset and no-onset stimuli. Journal of Experimental Psychology: Human Perception and Performance.
  • Smith, P. L., & McKenzie, C. R. L. (2011). Diffusive information accumulation by minimal recurrent neural models of decision-making. Neural Computation, 23, 2000-2031.
  • Ratcliff, R., Hasegawa, Y., Hasegawa, Y., Childers, R., Smith, P. L., & Segraves, M. (2011). Inhibition in superior colliculus neurons in a brightness discrimination task? Neural Computation, 23, 1790-1820.
  • Smith, P. L., Ellis, R., Sewell, D. K., & Wolfgang, B. J. (2010). Cued detection with compound integration-interruption masks reveals multiple attentional mechanisms. Journal of Vision, 10(5):3, 1-28.
  • Smith, P. L. (2010). From Poisson shot noise to the integrated Ornstein-Uhlenbeck process: Neurally-principled models of diffusive evidence accumulation in decision-making and response time. Journal of Mathematical Psychology, 54, 266-283.
  • Smith, P. L. (2010). Attention and the detection of weak visual signals. In V. Coltheart (Ed). Tutorials in Visual Cognition (pp. 211-259), Hove, Sussex: Psychology Press.
  • Ratcliff, R., & Smith, P. L. (2010). Perceptual discrimination in static and dynamic noise: The temporal relationship between perceptual encoding and decision making. Journal of Experimental Psychology: General, 132, 73-94.
  • Smith, P. L., & Ratcliff, R. (2009). An integrated theory of attention and decision making in visual signal detection. Psychological Review, 116, 283-317.
  • Liu, C. C., Wolfgang, B. J., & Smith, P. L. (2009). Attentional mechanisms in simple visual detection: A speed-accuracy tradeoff analysis. Journal of Experimental Psychology: Human Perception and Performance, 35, 1329-1345.
  • Liu, C. C., & Smith, P. L. (2009). Comparing time-accuracy curves: Beyond goodness-of-fit measures. Psychonomic Bulletin & Review, 16, 190-203.
  • Smith, P. L., Lee, Y-E., Wolfgang, B. J., & Ratcliff, R. (2009). Attention and the detection of masked radial frequency patterns: Data and model. Vision Research, 49, 1363-1377.
  • Gould, I.C., Wolfgang, B. J., & Smith, P.L. (2007). Spatial uncertainty explains endogenous and exogenous cuing effects in visual signal detection. Journal of Vision, 7, 13(4), 1-17.
  • Smith, P.L., & Wolfgang, B. J. (2007). Attentional mechanisms in visual signal detection: Effects of simultaneous and delayed noise and pattern masks. Perception & Psychophysics, 69, 1093-1104.
  • Ratcliff, R., Hasegawa, Y., Hasegawa, R., Smith, P. L., & Segraves, M., (2007). A dual diffusion model for single cell recording data from the superior colliculus in a brightness discrimination task. Journal of Neurophysiology, 97, 1756-1797.
  • Brown, S. D., Ratcliff, R., & Smith, P. L. (2006). Evaluating methods for approximating stochastic differential equations. Journal of Mathemathical Psychology, 50, 390-401.
  • Ratcliff, R., Thapar, A., Smith, P. L., & McKoon, G. (2005). Aging and response times. In J. Duncan, L. Phillips, & P. McLeod (Eds). Measuring the Mind (pp. 3-32).Oxford, UK: Oxford University Press.
  • Smith, P.L., Wolfgang, B.J., & Sinclair, A.B. (2004). Mask-dependent cuing effects in visual signal detection: The psychometric function for contrast. Perception & Psychophysics, 66, 1056-1075.
  • Smith, P. L., Ratcliff, R., & Wolfgang, B.J. (2004). Attention orienting and the time course of perceptual decisions: response time distributions with masked and unmasked displays. Vision Research, 44, 1297-1320.
  • Smith, P.L., & Ratcliff, R. (2004). Psychology and neurobiology of simple decisions. Trends in Neurosciences, 27, 161-168.
  • Smith, P.L. & Wolfgang B.J. (2004). The attentional dynamics of masked detection. Journal of Experimental Psychology: Human Perception and Performance, 30, 119-136.
  • Ratcliff, R., & Smith, P. L. (2004). A comparison of sequential-sampling models for two choice reaction time. Psychological Review, 111, 333-367.

Dr Simon Cropper

  • Cropper SJ, Kvansakul JGS, Little DR (2013) The Categorisation of Non-Categorical Colours: A Novel Paradigm in Colour Perception. PLoS ONE 8(3): e59945. doi:10.1371/journal.pone.0059945
  • Morris A.P., Liu C., Cropper S.J., Forte J.D., Krekelberg B., & Mattingley J.B. (2010) Summation of visual motion across eye movements reflects a non-spatial decision mechanism. Journal of Neuroscience 30(29):9821–9830
  • Judd, T., Kennedy, G & Cropper S. J. (2010) Using wikis for collaborative learning: Assessing collaboration through contribution. Australasian Journal of Educational Technology 26(3), 341-354.
  • Cropper, S. J., Kvansakul, J.G.S. & Johnston, A. (2009) The detection of the motion of chromatic and luminance contrast modulation: A parametric study. Attention, Perception and Psychophysics (formerly Perception and Psychophysics) 71(4) 757-782.
  • Cropper, S. J., & Badcock, D. R. (2008). Perception of direction of motion reflects the early integration of first and second-order stimulus spatial properties. Journal of Vision, 8(4):12, 1-10, http://journalofvision.org/8/4/12/, doi:10.1167/8.4.12.
  • Cropper, S. J. (2006). The detection of motion in chromatic stimuli: Pedestals and masks. Vision Research, 46, 724-738
  • Cropper, S. J. & Wuerger, S. M. (2005). The perception of motion in chromatic stimuli. Behavioural and Cognitive Neuroscience Reviews, 4(3) 192-217
  • Wuerger. S.M., Atkinson., P. & Cropper, S.J. (2005) Unique hues are linearly related to cone signals. Vision Research, 45(25-26) 3210-3223.
  • Cropper, S. J. (2005). The detection of motion in chromatic stimuli: First-order and second-order spatial structure. Vision Research, 45(7), 865-880.
  • Cropper S. J. & Johnston, A. (2001) The motion of contrast-envelopes: Peace and Noise . Journal of the Optical Society of America, A, 18(9,) 2237-2254.
  • Cropper, S. J. (1998) The detection of chromatic and luminance contrast-modulation by the visual system. Journal of the Optical Society of America, A, 15(8), 1969-1986.
  • Cropper, S. J. & Hammett, S. T. (1997) Adaptation to motion of a second-order pattern: The motion aftereffect is not a general result. Vision Research, 37, 2247-2259
  • Mullen, K. T., Cropper, S. J. & Losada, M. A. (1997) Absence of subthreshold summation between red-green and luminance mechanisms over a wide range of spatio-temporal conditions. Vision Research, 37, 1157-1167.
  • Cropper, S. J., Mullen, K. T. & Badcock, D.R. (1996) Motion coherence across different chromatic axes. Vision Research , 36, 2475-2489.
  • Cropper, S. J. & Derrington, A. M. (1996) Rapid, colour-specific motion detection in the human visual system. Nature. 379, 72-74.
  • Cropper, S. J. & Derrington, A. M. (1996). Detection and motion-detection in chromatic and luminance beats. Journal of the Optical Society of America, A, 13(3). 401-407.
  • Cropper, S. J., Badcock, D. R. & Hayes, A. (1994) On the role of second-order signals in the perceived direction of type II plaid patterns. Vision Research, 34, 2609-2612.
  • Cropper, S. J. & Badcock, D. R. (1994) Discriminating smooth from sampled motion: Chromatic and luminance stimuli. Journal of the Optical Society of America, A, 11(2), 515-530.
  • Cropper, S. J. & Derrington, A. M. (1994) Motion of chromatic stimuli: First-order or second-order? Vision Research. 34, 49-58.
  • Cropper, S. J. (1994) Velocity discrimination in chromatic gratings and beats. Vision Research. 34, 41-48.

Dr David Sewell

  • Sewell, D. K. & Lewandowsky, S. (in press). Attention and working memory capacity: Insights from blocking, highlighting, and knowledge restructuring. Journal of Experimental Psychology: General. [pdf]
  • Sewell, D. K. & Smith, P. L. (in press). Attentional control in visual signal detection: Effects of abrupt-onset and no-onset stimuli. Journal of Experimental Psychology: Human Perception & Performance.[pdf]
  • Sewell, D. K. & Smith, P. L. (in press). Attentional control in visual signal detection: Effects of abrupt-onset and no-onset stimuli. Journal of Experimental Psychology: Human Perception & Performance.[pdf]
  • Sewell, D. K., Little, D. R., & Lewandowsky, S. (2011). Bayesian computation and mechanism: Theoretical pluralism drives scientific emergence. Behavioral & Brain Sciences, 34, 212-213. [pdf], [target article by Jones and Love]
  • Smith, P. L., Ellis, R., Sewell, D. K., & Wolfgang, B. J. (2010). Cued detection with compound integration-interruption masks reveals multiple attentional mechanisms. Journal of Vision, 10, 1-28. [pdf]

Research Projects

This Research Group doesn't currently have any projects



Faculty Research Themes

Neuroscience

School Research Themes

Cognitive Psychology and Behavioural Neuroscience



Key Contact

For further information about this research, please contact Professor Philip L Smith

Department / Centre

Melbourne School of Psychological Sciences

Unit / Centre

Vision and Attention Laboratory