Lawrence K Cormack
Professor — Ph.D., University of California at Berkeley

Contact
- E-mail: cormack@utexas.edu
- Phone: (512) 471-5380
- Office: SEA 4.228
- Campus Mail Code: A8000
Interests
Visual System; Natural Scene Statistics; Data Analysis and Visualization
Biography
Larry Cormack is a Professor of Psychology and Neuroscience at the University of Texas at Austin, and is an active member of the Center for Perceptual Systems. He received his B.S. with Highest Honors in Psychology from the University of Florida in 1986 and his Ph.D. in Physiological Optics from the University of California, Berkeley in 1992.
Dr. Cormack’s primary research interest is how the brain processes the motion of objects through the 3D environment. This topic is of interest because it is of utmost behavioral importance, it is not well understood, and yet it is a synthesis of two topics that are reasonably well understood (the binocular perception of depth, and the perception of 2D motion). Dr. Cormack is also interested in natural scene statistics and their relation to the evolution of the visual system, particularly with regard to depth and motion processing.
Dr. Cormack teaches mostly graduate statistics.
Courses
PSY 418 • Statistics/Research Design
41903-41904 • Spring 2020
Meets TTH 11:00AM-12:30PM SEA 2.108
IIQRWr
PSY 323 • Perception
41595 • Fall 2019
Meets TTH 9:30AM-11:00AM CPE 2.210
PSY 323 • Perception
42768 • Fall 2018
Meets WF 1:00PM-2:30PM CPE 2.216
PSY 323 • Perception
43095 • Fall 2017
Meets TTH 2:00PM-3:30PM NOA 1.124
PSY 384M • Adv Statistics: Inferential
43270 • Fall 2016
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 184R • Data Analysis With R
43275 • Fall 2016
Meets T 12:30PM-1:30PM SEA 2.108
PSY 323 • Perception
42317 • Spring 2016
Meets TTH 8:00AM-9:30AM NOA 1.126
PSY 384M • Adv Statistics: Inferential
42425 • Fall 2015
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 184R • Data Analysis With R
42429 • Fall 2015
Meets T 1:00PM-2:00PM SEA 2.116
PSY 384M • Adv Statistics: Inferential
43835 • Fall 2014
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 184R • Data Analysis With R
43840 • Fall 2014
Meets TH 1:00PM-2:00PM SEA 2.116
PSY 394U • Smnr In Cognition And Perceptn
44335 • Spring 2014
Meets M 12:00PM-3:00PM SEA 4.242
PSY 384M • Adv Statistics: Inferential
43875 • Fall 2013
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 394U • Curr Tpcs In Cognitv Systems
44007 • Fall 2013
Meets M 12:00PM-3:00PM SEA 4.242
PSY 394U • Smnr In Cognition And Perceptn
43675 • Spring 2013
Meets M 12:00PM-3:00PM SEA 4.242
NEU 384M • Adv Statistics: Inferential
56710 • Fall 2012
Meets TTH 11:00AM-12:30PM SEA 2.108
(also listed as PSY 384M)
PSY 394U • Smnr In Cognition And Perceptn
43543 • Fall 2012
Meets M 12:00PM-3:00PM SEA 4.242
PSY 458 • Experimental Psychology
43335 • Spring 2012
Meets TTH 2:00PM-5:00PM SEA 2.116
QRWr
C2
PSY 384M • Adv Statistics: Inferential
43300 • Fall 2011
Meets TTH 11:00AM-12:30PM SEA 2.108
NEU 385L • Bootstrap Statistics
56775 • Spring 2011
Meets TTH 11:00AM-12:30PM SEA 2.116
(also listed as PSY 394U, SSC 384)
PSY 458 • Experimental Psychology
43830 • Spring 2011
Meets TTH 2:00PM-5:00PM SEA 2.116
Wr
C2
NEU 384M • Adv Statistics: Inferential
56030 • Fall 2010
Meets TTH 11:00AM-12:30PM SEA 2.108
(also listed as PSY 384M)
NEU 385L • Bootstrap Statistics
57530 • Spring 2010
Meets TTH 11:00AM-12:30PM SEA 2.116
(also listed as PSY 394U)
NEU 385L • Bootstrap Statistics
57583 • Spring 2009
Meets TTH 11:00AM-12:30PM SEA 2.116
(also listed as PSY 394U)
PSY 458 • Experimental Psychology-W
43240 • Spring 2009
Meets TTH 2:00PM-5:00PM SEA 2.116
C2
PSY 323 • Perception
44170 • Fall 2008
Meets MWF 2:00PM-3:00PM BUR 108
PSY 384M • Adv Statistics: Inferential
44345 • Fall 2008
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 394U • Do-It-Yourself Statistics
44305 • Spring 2008
Meets TTH 11:00AM-12:30PM SEA 2.116
PSY 323 • Perception
45005 • Fall 2007
Meets MWF 11:00AM-12:00PM NOA 1.124
PSY 384M • Adv Statistics: Inferential
45210 • Fall 2007
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 394U • Do-It-Yourself Statistics
43947 • Spring 2007
Meets TTH 11:00AM-12:30PM SEA 2.116
PSY 384M • Adv Statistics: Inferential
44965 • Fall 2006
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 394U • Do-It-Yourself Statistics
45115 • Fall 2006
Meets TTH 2:00PM-3:30PM SEA 2.116
PSY 384M • Adv Statistics: Inferential
43145 • Spring 2006
Meets TTH 2:00PM-3:30PM SEA 2.116
PSY 384M • Adv Statistics: Inferential
43120 • Fall 2005
Meets TTH 11:00AM-12:30PM SEA 2.108
PSY 394U • Do-It-Yourself Statistics
43285 • Fall 2005
Meets TTH 2:00PM-3:30PM SEA 2.116
PSY 323 • Perception
41420 • Spring 2005
Meets TTH 9:30AM-11:00AM WAG 101
PSY 384M • Advanced Stat: Inferential
42710 • Fall 2004
Meets TTH 11:00AM-12:30PM SEA 2.122
PSY 394U • Do-It-Yourself Statistics
42825 • Fall 2004
Meets TTH 2:00PM-3:30PM SEA 2.116
PSY 323 • Perception
39950 • Spring 2004
Meets TTH 9:30AM-11:00AM GRG 102
PSY 384M • Advanced Stat: Inferential
41270 • Fall 2003
Meets TTH 11:00AM-12:30PM SEA 2.122
PSY 394U • Computational Modeling
41378 • Fall 2003
Meets TTH 2:00PM-3:30PM SEA 2.122
PSY 323 • Perception
40170 • Spring 2003
Meets TTH 2:00PM-3:30PM NOA 1.126
PSY 384M • Advanced Stat: Inferential
41068 • Fall 2002
Meets TTH 11:00AM-12:30PM SEA 2.122
PSY 323 • Perception
40050 • Spring 2002
Meets TTH 2:00PM-3:30PM ESB 333
PSY 394U • Computnl Modeling In Exper Psy
41355 • Fall 2001
Meets W 12:00PM-3:00PM BEN 318
PSY 323 • Perception
39835 • Spring 2001
Meets TTH 2:00PM-3:30PM GAR 1
PSY 394U • Computnl Modeling In Exper Psy
41135 • Fall 2000
Meets W 12:00PM-3:00PM BEN 318
PSY 323 • Perception
39240 • Spring 2000
Meets TTH 2:00PM-3:30PM BUR 112
Publications
Reno, James; Thakore, Neha; Cormack, Lawrence; Schallert, Timothy; Bell, Richard; Maddox, W.; Duvauchelle, Christine (2017) Negative affect-associated USV acoustic characteristics predict future excessive alcohol drinking and alcohol avoidance in male P and NP rats. Alcoholism: Clinical & Experimental Research, In Production. DOI: 10.1111/acer.13344.
Auchter, A., Cormack, L.K., Niv, Y., Gonzalez-Lima, F., & Monfils, M.H. (2017) Reconsolidation-extinction interactions in fear memory attenuation: the role of inter-trial interval variability. Frontiers in Behavioral Neuroscience, 11(2), DOI=10.3389/fnbeh.2017.00002.
Joo, S.J., Czuba, T. B., Cormack, L.K., & Huk, A.C. (2016). Separate perceptual and neural processing of velocity- and disparity-based 3D motion signals. Journal of Neuroscience,36(42) 10791-10802, DOI: http://dx.doi.org/10.1523/JNEUROSCI.1298-16.2016.
Greer, D.A., Bonnen, K.L., Huk, A.C., Cormack, L.K. (2016) Speed discrimination in the far monocular periphery: A relative advantage for interocular comparisons consistent with self-motion. Journal of Vision , 16(10):7 doi: 10.1167/16.10.7.
Choi, L.K., Bovik, A.C., & Cormack, L.K. (2016) The effect of eccentricity and spatiotemporal energy on motion silencing. Journal of Vision, 16(5) DOI: 10.1167/16.5.19
Choi, L.K., Cormack, L.K., & Bovik, A.C. (2016) Motion silencing of flicker distortions on naturalistic videos. Signal Processing: Image Communication, 39, 328-341
Katz, L.N., Hennig, J., Cormack, L.K., & Huk, A.C. (2015). A distinct mechanism of temporal integration for motion through depth. Journal of Neuroscience, 35(28): 10212-10216.
Bonnen, KL, Burge, JD, Yates, JL, Pillow, JW & Cormack, LK. (2015) Continuous Psychophysics: Target-tracking to Measure Visual Sensitivity. Journal of Vision, 15(3). Get it!
C.-C. Su., L.K. Cormack, & A.C. Bovik. (2015) Oriented Correlation Models of Distorted Natural Images with Application to Natural Stereopair Quality Evaluation. IEEE Transactions on Image Processing, 22(1).
Czuba, T. B., Huk, A. C., Cormack, L. K. & Cohn, A. (2014) Area MT encodes three-dimensional motion. The Journal of Neuroscience. 34(47): 15522-15533; doi: 10.1523/JNEUROSCI.1081-14.2014
L. K. Choi, A. C. Bovik, and L. K. Cormack (2014) "Spatiotemporal flicker detector model of motion silencing," Perception , vol. 43, pp. 1286-1302.
C.-C. Su., L.K. Cormack, & A.C. Bovik. (2014) Bivariaate statistical modeling of color and range in natural scenes. Proc. SPIE. 9014, Human Vision and Electronic Imaging XIX doi:10.1117/12.2036505
Chen, M., Cormack L. & Bovik, A. (2014) Distortion conspicuity on stereoscopically viewed 3D images may correlate to scene content and distortion type. Journal of the Society for Information Display. 21(11) DOI: 10.1002/jsid.198
C.-C. Su., L.K. Cormack, & A.C. Bovik. (2014) Closed-Form Correlation Model of Oriented Bandpass Natural Images. IEEE Signal Processing Letters (22)1. doi: 10.1109/LSP.2014.2345765
Jackson, R.E., Willey, C.R., & Cormack, L.K. (2013) Learning and Exposure Affect Environmental Perception Less than Evolutionary Navigation Costs. PLoS ONE 8(4): e59690. doi:10.1371/journal.pone.0059690
Mulligan, J.B., Stevenson, S.B., & Cormack, L. K. (2013) Reflexive and voluntary control of smooth eye movements. Proc. SPIE. 8651, Human Vision and Electronic Imaging XVIII doi: 10.1117/12.2010333
C.-C. Su, A.C. Bovik and L.K. Cormack, (2013) "Color and depth priors in natural images," IEEE Transactions on Image Processing. 22(6). doi: 10.1109/TIP.2013.2249075
Chen, M., Su, C. , Kwan, D., Cormack L. & Bovik, A. (2013) Full-Reference Quality Assessment of Stereopairs Accounting for Rivalry. Signal Processing: Image Communication. 28(9). doi:10.1016/j.image.2013.05.006
Reno, J.M., Marker, B., Cormack, L.K., Schallert, T., Duvauchelle, C.L. (2013) Automating ultrasonic vocalization analyses: the WAAVES program. Journal of neuroscience methods. 219(1). doi:10.1016/j.image.2013.05.006
Czuba, T. B., Rokers, B., Huk, A. C. & Cormack, L. K. (2012) To CD or not to CD: Is there a 3D motion aftereffect based on changing disparities? Journal of Vision. 12(4)
Czuba, T. B., Rokers, B., Guillet, K., Huk, A. C. & Cormack, L. K. (2011) 3D motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth. Journal of Vision. 11(10): 18; doi:10.1167/11.10.18
Pohl, J., Atkinson, N, & Cormack, L.K. (under revision) Bootstrapping Analysis of Tolerance to Ethanol in Drosophila Melanogaster. PLoS ONE.
Kane, J.R., Ciucci, M.R., Jacobs, A.N., Tews, N., Russell, J.A., Ahrens, A.M., Ma S.T., Britt, J.M., Cormack, L.K. & Schallert, T. (2011) Assessing the role of dopamine in limb and cranial-oromotor control in a rat model of Parkinson’s disease. Journal of Communication Disorders, 44, 5, 529-537.
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Czuba, T. B., Rokers, B., Guillet, K., Huk, A. C. & Cormack, L. K. (2011) 3D motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth. Journal of Vision. 11(10): 18; doi:10.1167/11.10.18
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O’Bryant, A.J., Allred, R.P., Maldonado, M.A., Cormack, L.K. & Jones, T.A. (2011) Breeder and batch-dependent variability in the acquisition and performance of a motor skill in adult Long–Evans rats. Behavioural Brain Research 224 (2011) 112–12. doi:10.1016/j.bbr.2011.05.028
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Liu, Y., Cormack L. & Bovik, A. (2011) Statistical modeling of 3D natural scenes with application to Bayesian stereopsis. IEEE Transactions on Image Processing. 20 (9). doi: 10.1109/TIP.2011.2118223
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Rokers, B., Czuba, T.B., Cormack, L.K. & Huk, A.C. (2011) Motion processing with two eyes in three dimensions. Journal of Vision. vol. 11 no. 2. doi: 10.1167/11.2.10
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Liu, Y., Cormack, L.K., & Bovik, A.C. (2010) Dichotomy between luminance and disparity features at binocular fixations. Journal of Vision 10(12), 1-17.
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Czuba, T. B., Rokers, B., Huk, A. C. & Cormack, L. K. (2010) Speed and eccentricity tuning reveals a central role for the velocity-based cue to 3D visual motion. Under revision at Journal of Neurophysiology. 104, 2886-2899. doi:10.1152/jn.00585.2009
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Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). Study of subjective and objective quality assessment of video. IEEE Transactions on Image Processing, 19(6), 1427-1441. (peer-reviewed)
Jackson, R.E. & Cormack, L.K. (2010). Reducing the presence of navigation risk eliminates strong environmental illusions. Journal of Vision, 10(5):9, 1-8. doi:10.1167/10.5.9 (peer-reviewed)
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Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). A subjective study to evaluate video quality assessment algorithms. Human Vision and Electronic Imaging XV, Proceedings of SPIE, 7527, 7527OH-1-10. doi:10.1117/12.845382
Seshadrinathan, K., Soundararajan, R., Bovik, A. & Cormack, L. K. (2010). A subjective study to evaluate video quality assessment algorithms. Human Vision and Electronic Imaging XV, Proceedings of SPIE, 7527, 7527OH-1-10. doi:10.1117/12.845382
Rokers, B., Cormack, L.K. & Huk, A.C. (2009). Disparity- and velocity- based signals for 3D motion perception in human MT+. Nature Neuroscience, 12, 1050-1055.
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van der Linde, I., Rajashekar, U., Bovik, A.C. & Cormack, L.K. (2009). Visual memory for fixated regions of natural scenes dissociates attraction and recognition. Perception. volume 38, pages 1152 - 1171.
University of Texas at Austin (2009, July 21). Brain's Center For Perceiving 3-D Motion Is Identified. ScienceDaily. Retrieved July 21, 2009, from http://www.sciencedaily.com/releases/2009/07/090721091831.htm
Tavassoli, A., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2009, September) Eye movements selective for spatial frequency and orientation during active visual search. Vision Research, 49(2), 173-181.
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Liu, Y., Bovik, A.C. & Cormack, L. (2008, September) Disparity Statistics in Natural Scenes. Journal of Vision, 8(11), 1-14.
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Monaco, J.P., Bovik, A.C. & Cormack, L.K. (2008, September) Nonlinearities in Stereoscopic Phase-Differencing. IEEE Transactions on Image Processing, 17(9), pgs. 1672-1684.
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Jackson, R.E. & Cormack, L.K., (2008, September) Evolved navigation theory and the environmental vertical illusion. Evolution and Human Behavior, 29(5), 299-304.
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Spinetta, M.J., Woodlee, M.T., Feinberg, L.M., Stroud, C., Schallert, K., Cormack, L.K. & Schallert, T. (2008, September) Alcohol-induced retrograde memory impairment in rats: prevention by caffeine. Psychopharmacology, 201(3), 361-371.
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Kirson, D., Huk, A.C. & Cormack, L.K. (2008, September) Quantifying spatial uncertainty of visual area boundaries in neuroimaging data. Journal of Vision, 8(10), 1-15.
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Rokers, B., Cormack, L.K. & Huk, A.C. (2008, September) Strong percepts of motion through depth without strong percepts of position in depth. Journal of Vision, 8(4), 1-10.
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Woodlee, M.T., Kane, J.R., Chang, J., Cormack, L.K. & Schallert, T. (2008, September) Enhanced function in the good forelimb of hemi-parkinson rats: Compensatory adaptation for contralateral postural instability? Experimental Neurology, 211(2), 511-517.
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Rajashekar, U., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2008, September) GAFFE: A Gaze-Attentive Fixation Finding Engine. IEEE Transactions on Image Processing, 17(4).
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Tavassoli, A., van der Linde, I., Bovik, A.C. & Cormack, L.K. (2007, September) Orientation anisotropies in visual search revealed by noise. Journal of Vision, 7(12), 1-8.
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Rajashekar, U., van der Linde, I. Bovik, A.C. & Cormack, L.K. (2007, September) Foveated Analysis of Image Features at Fixations. Vision Research, 41, 3160-3172.
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Jackson, R.E. & Cormack, L.K. (2007, September) Evolved navigation theory and the descent illusion. Perception & Psychophysics, 69(3), 353-362.
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Tavassoli, A., van der Linde, I. Bovik, A.C., & Cormack, L.K. (2007, September) An Efficient Technique for Revealing Visual Search Strategies with Classification Images. Perception & Psychophysics, 69(1), 103-112.
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Rajashekar, U., Arnow, T., Bovik, A. & Cormack, L. (2006, September) Gaze-centric image analysis for efficient visual search. SPIE Newsroom.
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Rajashekar, U., Bovik, A.C. & Cormack, L.K. (2006, September) Visual search in noise: Revealing the influence of structural cues by gaze-contingent classification image analysis. Journal of Vision, 6(4), 379-386.
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Cormack, L. (2005) Mathematical models of human vision. In A. Bovik (Ed.), Handbook of Image and Video Processing. Second Edition. New York: Academic Press.
Sheikh, H.R., Bovik, A.C., & Cormack, L.K. (2005, September) No-Reference Quality Assessment using Natural Scene Statistics: JPEG2000. IEEE Transactions on Image Processing, Vol. 14, No. 11, 1918-1927.
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Rajashekar, U., Cormack, L.K. & Bovik, A.C. (2004) Point of gaze analysis reveals visual search strategies. Proc. of SPIE, Vol:5292.
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Sheikh, H.R., Bovik, A.C., Cormack, L. (2003) Blind Quality Assessment of JPEG2000 Compressed Images Using Natural Scene Statistics. Proc. IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA.
Rajashekar, U., Cormack, L.K. & Bovik, A.C. (2002) Visual search: structure from noise. Proceedings of the Eye Tracking Research & Applications Symposium 2002, New Orleans, LA, USA, March 25-27, 2002. ACMPress.
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Stevenson, S.B. & Cormack, L.K. (2000, September) A contrast paradox in stereopsis, motion perception, and vernier acuity. Vision Research, 40, 2881-2884.
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Chen, T., Bovik, A.C. & Cormack, L.K. (1999, September) Stereoscopic ranging by matching image modulations. IEEE Transactions on Image Processing, 8, 785-797.
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Cormack, L.K., Stevenson, S.B. & Landers, D.D. (1997, September) Interactions of Spatial Frequency and unequal Monocular Contrasts in Stereopsis. Perception, 26, 1121-1136.
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Cormack, L.K., Landers, D.D. & Ramakrishnan, S. (1997, September) Element density and the efficiency of binocular matching. Journal of the Optical Society of America, A(14), 723-730.
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Landers, D.D. & Cormack, L.K. (1997, September) Asymmetries and errors in perception of depth from disparity suggest a multi-component model of disparity processing. Perception & Psychophysics, 59, 219-231.
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Cormack, L.K. & Riddle, R.B. (1996, September) Binocular correlation detection with oriented dynamic random-line stereograms. Vision Research, 36, 2303-2310.
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Cormack, L.K., Stevenson, S.B. & Schor C.M. (1994, September) An upper limit to the binocular combination of stimuli. Vision Research, 34, 2599-2608.
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Stevenson, S.B., Cormack, L.K. & Schor.C.M. (1994, September) The effect of stimulus contrast and interocular correlation on disparity vergence. Vision Research, 34, 383-396.
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Cormack, L.K., Stevenson, S.B. & Schor C.M. (1993, September) Disparity-tuned channels of the human visual system. Visual Neuroscience, 10, 585-596.
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Stevenson, S.B., Cormack, L.K., Schor C.M. & Tyler, C.W. (1992, September) Disparity tuning in mechanisms of human stereopsis. Vision Research, 32, 1685-1694.
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Schor, C.M., Alexander, J., Cormack, L. & Stevenson, S. (1992) A negative feedback control model of proximal convergence and accommodation. Ophthalmic and Physiological Optics, 12, 307-318.
Cormack, L.K., Stevenson, S.B. & Schor C.M. (1991, September) Interocular correlation, luminance contrast and cyclopean processing. Vision Research, 31, 2195-2207.
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Cormack, L., Stevenson, S. & Schor.C. (1991, September) Depth attraction and repulsion in random dot stereograms. Vision Research, 31, 805-813.
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Cormack, L., Stevenson, S. & Schor.C. (1989, September) Hyperacuity, superresolution and gap resolution in human stereopsis. Vision Research, 29, 1597-1605.
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Cormack, L., White, K., Woods, C., Krantz, J. & Franzen, O. (1987) Binocular convergence to interocular correlations. In S. Asfour (Ed.), Trends in Ergonomics/Human Factors IV. North-Holland: Elsevier Science.