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

Currently no project details available


Research Themes

Neuroscience

Areas of Excellence

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

Melbourne School of Psychological Sciences