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James W. Pennebaker, Chair The University of Texas at Austin, SEA 4.212, Austin, TX 78712 • (512) 475-7596

Lawrence K Cormack

Professor Ph.D., University of California at Berkeley

Lawrence K Cormack
" Make your best guess, double it, then go to the next unit up – that's how long it's going take you. "

Contact

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.

Interests

Visual System; Natural Scene Statistics; Data Analysis and Visualization

PSY 384M • Adv Statistics: Inferential

43835 • Fall 2014
Meets TTH 1100am-1230pm SEA 2.108
show description

Inferential. Same as Neuroscience 384M. Covers t-test, chi-square, analysis of variance, and nonparametric tests. Three lecture hours a week for one semester. Prerequisite: Graduate standing, an undergraduate statistics course, and consent of instructor.

PSY 184R • Data Analysis With R

43840 • Fall 2014
Meets TH 100pm-200pm SEA 2.108
show description

Using R for a variety of data analyses following the topics covered in Psychology 384M including:reading data into R, generating graphs, ANOVA, ANCOVA, and regression. One lecture hour a week for one semester. Offered on the letter-grade basis only. Prerequisite: Consent of instructor, and registration or credit for Psychology 384M.

PSY 394U • Topics In Perception And Syste

43975 • Fall 2014
Meets M 1200pm-300pm SEA 4.242
show description

Seminars in Cognitive or Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 394U • Smnr In Cognition And Perceptn

44335 • Spring 2014
Meets M 1200pm-300pm SEA 4.242
show description

Seminars in Cognitive or Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 384M • Adv Statistics: Inferential

43875 • Fall 2013
Meets TTH 1100am-1230pm SEA 2.108
show description

Inferential. Same as Neuroscience 384M. Covers t-test, chi-square, analysis of variance, and nonparametric tests. Three lecture hours a week for one semester. Prerequisite: Graduate standing, an undergraduate statistics course, and consent of instructor.

PSY 394U • Curr Tpcs In Cognitv Systems

44007 • Fall 2013
Meets M 1200pm-300pm SEA 4.242
show description

Seminars in Cognitive or Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 394U • Smnr In Cognition And Perceptn

43675 • Spring 2013
Meets M 1200pm-300pm SEA 4.242
show description

Seminars in Cognitive or Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 384M • Adv Statistics: Inferential

43420 • Fall 2012
Meets TTH 1100am-1230pm SEA 2.108
show description

The core graduate stats class for Psychology and Neuroscience.  The website is

http://laits.utexas.edu/cormack/384m/index.html

PSY 394U • Smnr In Cognition And Perceptn

43543 • Fall 2012
Meets M 1200pm-300pm SEA 4.242
show description

Seminars in Cognitive or Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 458 • Experimental Psychology

43335 • Spring 2012
Meets TTH 200pm-500pm SEA 2.116
show description

This course will expose you to some basic issues likely to be encountered if you pursue a career in science. The develo thinking will be emphasized. We will conduct four or five research projects. You will perform statistical analysis on th papers in APA format on the research projects. These projects will increase in size and complexity as the semester pro also have to read and think critically about journal articles from the literature. We do several in-class assignments on M you are unfamiliar with this or a similar spreadsheet program, please budget some extra time for learning this software.

As this course is designed for those entering graduate school, you will be treated as first-year graduate students. You do a large amount of work and thinking on your own. You will face questions for which there is no one correct answe proceed as you feel best onto uncertain ground. Many students are very uncomfortable with this type of uncertainty, b scientific research and is, therefore, intrinsic to this course. Many students have decided that graduate school wasn't fo this course.

This course carries the Writing Flag. Writing Flag courses are designed to give students experience with writing in an a discipline. In this class, you can expect to write regularly during the semester, complete substantial writing projects, an from your instructor to help you improve your writing. You will also have the opportunity to revise one or more assign and discuss your peers' work. You should therefore expect a substantial portion of your grade to come from your writt

I will assume that you are facile with basic statistical and mathematical concepts (e.g. algebra). If you are not, be prepa extra time and effort on the course.

You should all be more expert than I on such matters as spelling, punctuation, and grammar. These aspects of your wri graded.

PSY 384M • Adv Statistics: Inferential

43300 • Fall 2011
Meets TTH 1100am-1230pm SEA 2.108
show description

Inferential. Same as Neuroscience 384M. Covers t-test, chi-square, analysis of variance, and nonparametric tests. Three lecture hours a week for one semester. Prerequisite: Graduate standing, an undergraduate statistics course, and consent of instructor.

PSY 458 • Experimental Psychology

43830 • Spring 2011
Meets TTH 200pm-500pm SEA 2.116
show description

Course Description

This course will expose you to some basic issues likely to be encountered if you pursue a career in science. The development of critical thinking will be emphasized. We will conduct four or five research projects. You will perform statistical analysis on the data and write papers in APA format on the research projects. These projects will increase in size and complexity as the semester progresses. You will also have to read and think critically about journal articles from the literature. We do several in-class assignments on Microsoft Excel; if you are unfamiliar with this or a similar spreadsheet program, please budget some extra time for learning this software.

Grading Policy

The three exams will cover class discussion, homework, in-class assignments, and the assigned textbook chapters. We do not spend much time discussing the textbook in class; it is your responsibility to keep up with the readings and discuss any questions with Dr. Cormack or the TA.  

Important:  The exams are cumulative and will cover both the text and all material we have covered in class.  There is generally 1) a multiple-choice section that primarily covers the assigned text chapters for that exam and 2) a conceptual short-answer & essay section that will cover new material, old material, and the relationship between the two.

Each of the three exams will represent 10% of your grade. Each of the first two papers will also represent 10% of your grade. The final two papers will each represent 15% of your grade.  In-class assignments will represent an additional 10% of your grade.  Additional readings and homework assignments will be given during the semester. The final 10% of the grade will reflect performance on these additional assignments and general class participation and effort (including, e.g. attendance).

Texts

Statistics for the Behavioral and Social Sciences, Aron and Aron; The Publication Manual of the APA (5th Ed.); The Elements of Style, Strunk & White.

Additional readings may be assigned.

Other Information http://homepage.psy.utexas.edu/homepage/Class/Psy458/Cormack/

PSY 394U • Bootstrap Statistics

44020 • Spring 2011
Meets TTH 1100am-1230pm SEA 2.116
show description

Seminars in Cognitive and Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 384M • Adv Statistics: Inferential

43260 • Fall 2010
Meets TTH 1100am-1230pm SEA 2.108
show description

Same as Neuroscience 384M. Covers t-test, chi-square, analysis of variance, and nonparametric tests. Three lecture hours a week for one semester. Prerequisite: Graduate standing, an undergraduate statistics course, and consent of instructor.

PSY 394U • Bootstrap Statistics

44175 • Spring 2010
Meets TTH 1100-1230pm SEA 2.116
(also listed as NEU 385L )
show description

Seminars in Cognitive and Perceptual Systems. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

PSY 458 • Experimental Psychology-W

43240 • Spring 2009
Meets TTH 200pm-500pm SEA 2.116
show description

Techniques of psychological research illustrated in a series of laboratory experiments. Two lecture hours and four laboratory hours a week for one semester. Prerequisite: Upper-division standing, a major in psychology, Psychology 301 and 418 with a grade of at least C in each, and a University grade point average of at least 3.25.

PSY 394U • Bootstrap Statistics

43435 • Spring 2009
Meets TTH 1100-1230pm SEA 2.116
(also listed as NEU 385L )
show description

Seminars in Cognition and Perception. Three lecture hours a week for one semester. May be repeated for credit when the topics vary. Prerequisite: Graduate standing and consent of instructor.

Publications

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.

Courses

Semester         Course       Unique No.       Title

2014 Spr      PSY 384C        44195       Bootstrap Statistics
2014 Spr      NEU 384C        57735      Bootstrap Statistics
2014 Spr      SSC 384          59750      Bootstrap Statistics

2014 Spr      PSY 394U       44335        Smnr Cognition & Perceptn

2013 Fall      NEU 384M       57890        Adv Statistics: Inferential

2013 Fall      PSY 384M        43875        Adv Statistics: Inferential

2013 Fall      PSY 394U        44007       1-Curr Tpcs in Cognitv Systems


 

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