Lynn A. Olzak

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 PEER-REVIEWED PUBLICATIONS

1. Roscoe, S. N., Olzak, L. A., and Randle, R. J. (1976) Ground-referenced visual orientation with visual displays: Monocular versus binocular accommodation and judgments of relative size. Proceedings of the AGARD Aerospace Medical Panel Specialists Meeting, Athens, Greece. Neuilly-sur-Seine, France: North Atlantic Treaty Organization.

2. Olzak, L. A. (1978) Target-terrain classification and detection Performance. Proceedings of the Human Factors Society 22nd Annual Meeting, 393-397.

3. Olzak, L. A. (1980) Bivariate response distributions in visual detection and discrimination. Proceedings of the Human Factors Society 24th Annual Meeting, 502-506.

4. Olzak, L. A. and Thomas, J. P. (1981) Gratings: Why frequency discrimination is sometimes better than detection. Journal of the Optical Society of America, 71, 64-70.

5. Olzak, L. A. and Wickens, T. D. (1983) The interpretation of detection data through direct multivariate frequency analysis. Psychological Bulletin, 93(3), 574-585.

6. Olzak, L. A. (1985) Interactions between spatially tuned mechanisms: Converging evidence. Journal of the Optical Society of America A, 2, 1551-1559.

7. Olzak, L. A. and Thomas, J. P. (1986) "Seeing Spatial Patterns". In K. Boff, L. Kaufman, and J. Thomas (Eds.), Handbook of Perception and Human Performance. New York: John Wiley & Sons.

8. Olzak, L. A. (1986) Widely separated spatial frequencies: Mechanism interactions. Vision Research, 26, 1143-1153.

9. Wickens, T. D. and Olzak, L. A. (1989) The statistical analysis of concurrent detection ratings. Perception & Psychophysics, 45, 514-528.

10. Stanislaw, H. and Olzak, L. A. (1990) Parametric methods for gamma and inverse gamma correction with extension to halftoning. Behavior Research Methods, Instruments, & Computers, 22, 402-408.

11. Thomas, J. P. and Olzak, L. A. (1990) Cue summationin spatial discriminations. Vision Research, 30, 1865-1875.

12. Olzak, L. A. and Thomas, J. P. (1991) When orthogonal orientations are not processed independently. Vision Research, 31, 51-57.

13. Thomas, J. P., Olzak, L. A., & Shimozaki, S. S. (1992) Using distinctive Fourier components to discriminate between complex patterns. Ophthalmic and Physiological Optics, 12, 189-192.

14. Wickens, T. D. and Olzak, L. A. (1992) Three views of association in concurrent detection ratings. In F. Gregory Ashby (Ed.)Multi-dimensional Models of Perception and Cognition. New Jersey: Erlbaum. (pp. 229-252)

15. Thomas, J. P. and Olzak, L. A. (1992) Simultaneous Detection and Identification. In F. Gregory Ashby (Ed.) Multidimensional Models of Perception and Cognition. New Jersey: Erlbaum. (pp. 253-277)

16. Olzak, L. A., Wickens, T. D., and Thomas, J. P. (1992) "Constraints on Fourier models of human pattern recognition." Human Vision, Visual Processing, and Digital Display III, Bernice E. Rogowitz, Editor, Proceedings SPIE 1666 (The Society of Photo-Optical Instrumentation Engineers), 416-423.

17. Olzak, L. A. and Thomas, J. P. (1992) Configural effects constrain Fourier models of pattern discrimination. Vision Research, 32,1885-1898.

18. Thomas, J. P., Olzak, L. A. and Shimozaki, S.S. (1993) The role of Fourier components in discrimination between two types of plaid patterns. Vision Research, 33, 1573-1579.

19. Thomas, J. P. and Olzak, L. A. (1996). Uncertainty experiments support the roles of second order mechanisms in spatial frequency and orientation discriminations. Journal of the Optical Society of America A, 13, 689-696.

20. Laurinen, P. I., Olzak, L. A., and Peromaa, T. L. (1997). Early cortical influences in object segregation and the perception of surface lightness. Psychological Science, 8, 386-390.

21. Thomas, J. P. and Olzak, L. A. (1997). Contrast gain control and fine spatial discriminations. Journal of the Optical Society of America A, 14, 2392-2405.

22. Olzak, L. A. and Wickens, T. D. (1997) Complex pattern discriminations: Orientation information is integrated across spatial scale; spatial frequency and contrast information is not. Perception, 26, 1101-1120.

23. Olzak, L. A. & Thomas, J. P. (1999). Neural recoding in human pattern vision: Model and mechanisms. Vision Research, 39, 231-256.

24. Olzak, L. A. and Laurinen, P. I. (1999) Multiple gain-control mechanisms in contrast-contrast phenomena. Vision Research, 39, 3983-3987.

25. Olzak, L. A. and Wickens, T. D. (1999) Paradigm shifts: New techniques to answer new questions. Perception, 28, 1509-1532.

26. Thomas, J. P. and Olzak, L. A. . (2001) Spatial phase sensitivity of the mechanisms that mediates discrimination of small orientation differences. Journal of the Optical Society of America A., 18(9), 2197-2203.

27.  Chubb, C., Olzak, L.. A. and Derrington, A. (2001)  Second-order processes in vision:  introduction.   Journal of the Optical Society of America A., 18, 2175-2178

28.  Laack, K. A. and Olzak, L. A. (2002) Orientation-selective summing mechanisms mediate visual search., 42, 1871-1877.

29.  Olzak, L. A. and Thomas, J. P. (2003) Dual nonlinearities regulate contrast sensitivity in pattern discrimination tasks. Vision Research, 43 (13), 1433-1442 .                                                                                  

             

30. Olzak, L. A.. and Laurinen, P. I. (2005)  Contextual effects in fine spatial discriminations. Journal of the Optical Society of America A.  22, in press

 

B. UNPUBLISHED WORK AND TECHNICAL REPORTS

1. Olzak, L. A. (1975) An Evaluation of Incidental Learning and Retention by the method of Stimulus Redundancy. Unpublished master's thesis, San Jose State University, San Jose, CA.

2. Olzak, L. A. (1976) Evaluation of incidental learning and retention by the method of stimulus redundancy. Paper presented at the Western Psychological Association Annual Meeting, Los Angeles, CA.

3. Olzak, L. A. (1978). Detection of Multiple-Vehicle Targets in Realistic Terrain. Naval Weapons Center, China Lake, CA. (NWC TP 6061; HAC Ref. E0265)

4. Carel, W. L., Herman, J. A., and Olzak, L. A. (1978). Design Criteria for Imaging Sensory Displays. Office of Naval Research, Arlington, VA. (ONR CR 213-107-1F)

5. Corrick, G. E., Olzak, L. A., and Agin, A. K. (1979). Linear Structural Equation Models of Target Acquisition Performance. Naval Weapons Center, China Lake, CA. (HAC Ref. E3900)

6. Olzak, L. A. (1981). Inhibition and Stochastic Interactions in Spatial Pattern Perception. (Doctoral Dissertation, University of California, Los Angeles, 1981). Dissertation Abstracts International, 42, 1651B. (University Microfilms No.8121021)

7. Olzak, L. A., Thomas, J. P. and Stanislaw, H. (1987). Development of a Chromatic/Luminance Contrast Scale. United States Department of Transportation, United States Coast Guard. November, 1987. (DOT Report No. CG-D 12-87)

8. Wickens, T. D. and Olzak, L. (1988, July). The statistical analysis of concurrent detection ratings. Symposium on Probabilistic Multidimensional Models of Perception, Twenty-First Annual Mathematical Psychology Meeting, Evanston, IL. July, 1988.

9. Olzak, L. A. (1989). Development of a Chromatic/Luminance Contrast Scale: Field Validation. United States Department of Transportation, United States Coast Guard (DOT Report No. CG-D 2-89).
 
                                                           PUBLISHED ABSTRACTS

*1. Thomas, J. P. and Olzak, L. A. (1979, May). Detection, discrimination, and integration of channel responses. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 33, 1633.

*2. Olzak, L. A. (1979, October). Detection of a complex grating and discrimination of its components. Papers presented at the Optical Society of America Annual Meeting, Rochester, N.Y. Journal of the Optical Society of America, 69, 1444.

*3. Olzak, L. A. (1981, April). Interactive properties of spatially tuned analyzers. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 20, 124.

*4. Olzak, L. A. (1981, October). Interactions among spatially tuned analyzers: A log-linear model. Paper presented at the Optical Society of America Annual Meeting, Kissimmee, FL. Journal of the Optical Society of America, 71, 1632.

*5. Olzak, L. A. (1982, May). Inhibition: Effects on grating detection and identification. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 22, 206.

*6. Olzak, L. A. and Wandell, B. A. (1983, May) Detection contours and field mixtures. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 24, 184.

*7. Wandell, B. A. and Olzak, L. A. (1983, May). Categorical color differences. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 24, 206.

*8. Olzak, L. A. and Kramer, P. (1984, October). Inhibition between spatially tuned mechanisms: Temporal influences. Paper presented at the Optical Society of America Annual Meeting, San Diego, CA. Journal of the Optical Society of America A, 1(13), 1290.

*9. Olzak, L. A., Wickens, T. D., and Gouled-Smith, B. (1985, May). Ruling out response bias in the concurrent detection task. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 26, 142.

*10. Olzak, L. A. and Thomas, J. P. (1985, October). Hyperacuity performance as a function of contrast. Paper presented at Optical Society of America Annual Meeting, Washington, D. C. Journal of the Optical Society of America A, 2(13), 102.

*11. Olzak, L. A. and Thomas, J. P. (1986, October). Spatial frequency matching in complex stimuli. Paper presented at Optical Society of America Annual Meeting, Seattle, WA. Journal of the Optical Society of America A, 3(13), 98.

*12. Olzak, L. A. (1987, May). Color Measurement: Asymmetry in MacAdam Ellipses. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 28, 212.

*13. Thomas, J. P. and Olzak, L. A. (1987, September). When are suprathreshold stimuli in different frequency bands perceived independently? Paper presented at the Tenth European Conference on Visual Perception, Varna, Bulgaria. Perception, 16, 234.

*14. Olzak, L. Detection contours in tristimulus space (1988, October). Paper presented at Optical Society of America Annual Meeting, Santa Clara, CA. OSA Annual Meeting Technical Digest, Vol. 11 of the OSA Technical Digest Series (Optical Society of America, Washington, D. C., 1988), 46.

*15. Thomas, J. P. and Olzak, L. A. (1989, May). Summation of discrimination cues lying in the same spatial frequency band. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 30, 485.

*16. Olzak, L. A. and Thomas, J. P. (1990, May). When orthogonal gratings are not processed independently. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 31, 430.

*17. Olzak, L. A. and Thomas, J. P. (1990, September). When a grid is not two gratings. Paper presented at the 13th European Conference on Visual Perception, Paris, France. September, 1990. Perception, 19, Supplement, 343-344.

*18. Olzak, L. A. and Thomas, J. P. (1990, November). Information integration across spatially tuned pathways. Paper presented at the Optical Society of America Annual Meeting, Boston, MA. OSA Annual Meeting Technical Digest, Vol. 15 of the OSA Technical Digest Series (Optical Society of America, Washington, D. C., 1990), 7.

*19. Thomas, J. P. and Olzak, L. A. (1991, May) Configural constraints in discriminating 2-D spatial patterns. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supp. to Investigative Ophthalmology & Visual Science, 32, 1023.

*20. Thomas, J. P. and Olzak, L. A. (1991, November). Contrast related nonlinearities do not account for configuration effects in discrimination. Paper presented at the Optical Society of America Annual Meeting, San Jose, CA. OSA Annual Meeting Technical Digest, Vol. 17 of the OSA Technical Digest Series (Optical Society of America, Washington, D. C., 1991), 167.

*21. Thomas, J. P., Olzak, L. A. and Shimozaki, S. S. (1992, May). Role of Fourier components in discrimination among plaids. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 33, 826.

*22. Olzak, L. A. and Thomas, J. P. (1992, May) Linear cue summation subserves some compound discriminations. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 33, 1343.

*23. Thomas, J. P., Olzak, L. A., and Wickens, T. D. (1992, September). The bridge between Fourier and feature codes: Some inferences from discrimination data. Paper presented at the 15th European Conference on Visual Perception, Pisa, Italy. Perception, 21, Supplement 2, pp. 6-7.

*24. Olzak, L. A. and Thomas, J. P. (1992, September). What can discrimination tasks tell us about texture perception? Paper presented at the Optical Society of America Annual Meeting, Albuquerque, N. M. OSA Annual Meeting Technical Digest, 1992 (Optical Society of America, Washington, D. C.,1992), Vol. 23, 159.

*25. Olzak, L. A. and Thomas, J. P. (1993, May). Normalizing and summing pools in complex frequency discriminations. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 34, 818.

*26. Olzak, L. A., Wickens, T. D., and Thomas, J. P. (1993, September). Why we can't see the forest for the trees: Serial processing of disparate frequency bands. Paper presented at the 16th European Conference on Visual Perception, Edinburgh, Scotland. Perception, 22, Supplement, p. 5.

*27. Thomas, J. P., Olzak, L. A., and Wickens, T. D. (1993, September) Spatial pooling properties of contrast-gain control and second-order summing mechanisms. Paper presented at the 16th European Conference on Visual Perception, Edinburgh, Scotland. Perception, 22, Supp., p. 40.

*28. Olzak, L. A., Wickens, T. D., and Thomas, J. P. (1993, October) Simultaneously discriminating different aspects of complex patterns: When you can, when you can't, and why. Paper presented at the Optical Society of America Annual Meeting, Toronto, CANADA. OSA Annual Meeting Technical Digest, 1993 (Optical Society of America, Washington, D. C., 1993), Vol. 16, 267-268.

*29. Olzak, L. A., Wickens, T. D., and Thomas, J. P. (1994, May) Psychophysics supports computational edge algorithms. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 35, 3063.

*30. Thomas, J. P. and Olzak, L. A. (1994, May) Is contrast gain control driven by local contrast energy? Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 35, 1084.

*31. Laurinen, P. I. and Olzak, L. A. (1994, May) Mechanisms of lightness perception. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Sarasota, FL. Supplement to Investigative Ophthalmology & Visual Science, 35, 3459.

*32. Olzak, L. A., Thomas, J. P. and Wickens, T. D. (1994, September) Higher-level edge detectors mediate complex orientation discriminations. Paper presented at the 17th European Conference on Visual Perception, Eindhoven, The Netherlands. Perception, 23, Supplement, 2.

*33. Thomas, J. P. and Olzak, L. A. (1994, September) What visual mechanisms mediate judgments about textures? Paper presented at the 17th European Conference on Visual Perception, Eindhoven, The Netherlands. Perception, 23, Supplement, 36.

*34. Laurinen, P. I. and Olzak, L. A. (1994, September) Spatially remote, frequency tuned mechanisms can control apparent lightness. Paper presented at the 17th European Conference on Visual Perception, Eindhoven, The Netherlands. Perception, 23, Supplement, p. 18.

*35. Olzak, L. A. and Thomas, J. P. (1994) Edge or shadow? Boundary cues in human vision. Paper presented at the Optical Society of America Meeting, Dallas, TX. OSA Annual Meeting Supplement to Optics & Photonics News, 5 (8), 99.

*36. Thomas, J. P. and Olzak, L. A. (1994) Stimulus uncertainty effects help define second order visual mechanisms. Paper presented at the Optical Society of America Meeting, Dallas, TX. OSA Annual Meeting Supplement to Optics & Photonics News, 5 (8), 48.

*37. Olzak, L. A. and Thomas, J. P. (1995) Edge or shadow II? Boundary Cues in human vision. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 36, p. S439.

*38. Laurinen, P. I. and Olzak, L. A. (1995) Textural segregation can suppress simultaneous contrast. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 36, p. S466.

*39. Olzak, L. A. and Thomas, J. P. (1995) Summing across edges in discrimination: Perceptual influences. Paper presented at the 18th European Conference on Visual Perception, Tubingen, Germany. Perception, 24, 40.

*40. Laurinen, P. I. and Olzak, L. A. (1995) Differential Textures can suppress lightness contrast. Paper presented at the 18th European Conference on Visual Perception, Tubingen, Germany. Perception, 24, 24.

*41. Thomas, J. P., Stankiewicz, B. J., and Olzak, L. A. (1995) The mechanism which mediates orientation discrimination is insensitive to phase. Paper presented at the 18th European Conference on Visual Perception, Tubingen, Germany. Perception, 24, 40-41.

*42. Olzak, L. A. and Thomas, J. P. (1995) Normalizing and summing pools in complex orientation discriminations. Paper presented at the Optical Society of America Meeting, Portland, OR. OSA Annual Meeting Supplement to Optics & Photonics News, 6 (7), 11-12.

*43. Thomas, J. P. and Olzak, L. A. (1995) Psychophysical specification of contrast gain control mechanisms. (Invited) Paper presented at the Optical Society of America Meeting, Portland, OR. OSA Annual Meeting Supplement to Optics & Photonics News, 6 (7), 54.

*44. Stankiewicz, B. J., Thomas, J. P., and Olzak, L. A. (1995) Multiple component orientation discrimination invariant with respect to phase. Paper presented at the Optical Society of America Meeting, Portland, OR. Supplement to Optics & Photonics News, 6 (7), 139.

*45. Olzak, L. A. and Thomas, J. P. (1996) Characteristics of third-stage mechanisms in pattern vision. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 37, S1148.

*46. Laurinen, P. I. and Olzak, L. A. (1996) Second-order mechanisms in perceived form from texture. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 37, S1147.

*47. Olzak, L. A., Thomas, J. P., and Wickens, T. D. (1996) Simultaneously judging contrast in different orientation and frequency bands. Paper presented at the 18th European Conference on Visual Perception, Strasbourg, France. Perception, 25, 23.

*48. Laurinen, P. I. and Olzak, L. A. (1996) Functional aspects of border-signalling mechanisms. Paper presented at the 18th European Conference on Visual Perception, Strasbourg, France. Perception, 25, 55.

*49. Olzak, L. A. and Laurinen, P. I. (1996) Second-order spatial mechanisms: one route to image segmentation? Paper presented at the Optical Society of America Meeting, Rochester, NY Supplement to Optics & Photonics News, 7 (7), 67.

*50. Laack, K. A. and Olzak, L. A. (1996) Isolating second-order mechanisms in a visual search paradigm. Paper presented at the Optical Society of America Meeting, Rochester, NY Supplement to Optics & Photonics News, 7 (7), 67.

*51. Olzak, L. A. and Wickens, T. D. (1997) Two stimuli. Two judgments. How many mediating mechanisms? Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 38, S631.

*52. Laurinen, P. I. and Olzak, L. A. (1997) Mechanisms underlying perceived form from texture. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 38, S639.

*53. Olzak, L. A. and Wickens, T. D. (1997) Assessing interactions through concurrent-judgment experiments. Invited Paper presented at the 20th European Conference on Visual Perception, ECVP XX Anniversary Symposium "Progress and Paradigm Shifts in Vision Research during 20 Years of ECVP, Helsinki, Finland. Perception, 26, 67.

*54. Olzak, L. A. and Wong, R. (1997) Discrimination between plaids: Do oriented filters combine dichoptically? Paper presented at the 20th European Conference on Visual Perception, Helsinki, Finland. Perception, 26, 120.

*55. Wickens, T. D. and Olzak, L. A. (1997) Noise effects in perceptual models. Paper presented at the 20th European Conference on Visual Perception, Helsinki, Finland. Perception, 26, 23.

*56. Laurinen, P. I. and Olzak, L. A. (1997) Summation of contrast in perceived form from texture. Paper presented at the 20th European Conference on Visual Perception, Helsinki, Finland. Perception, 26, 126.

*57. Olzak, L. A. and Thomas, J. P. (1997) Models of cortical contrast gain control: A test. Paper presented at the Optical Society of America Meeting, Rochester, NY Supplement to Optics & Photonics News, 8 (8), 97.

*58. Olzak, L. A., Thomas, J. P., and Wickens, T.D. (1998) Apparent linearity in higher-level summing units. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 39, S1110.

*59. Laurinen, P. I. And Olzak, L. A. (1998) Spatial interactions in higher-level gain control pools. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 39, S410.

*60. Laurinen, P. I. And Olzak, L. A. (1998b) Two processes underlie center-surround contrast suppression? Paper presented at the 21st European Conference on Visual Perception, Oxford, England. Perception, 27, 53.

*61. Thomas, J. P. and Olzak, L. A. (1998) Gain control and integration processes in line- and edge-coding mechanisms. Paper presented at the 21st European Conference on Visual Perception, Oxford, England. Perception, 27, 54.

*62. Olzak, L. A. and Thomas, J. P. (1998) Coding the orientation of lines and edges. Paper presented at the Optical Society of America Meeting, Baltimore, Md. Supplement to OPN Optics & Photonics News, 9, 55.

*63. Guttman, S. E., Kellman, P. J., and Olzak, L. A. (1998) Distinguishing object motion from observer motion using minimal visual information. Paper presented at the Optical Society of America Meeting, Baltimore, Md. Supplement to OPN Optics & Photonics News, 9, 111.

*64. Olzak, L. A. and Thomas, J. P. (1999) Coding object boundaries: pooling in contrast gain control processes. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 40, S780.

*65. Laack, K. A. and Olzak, L. A. (1999) Higher-level summing circuits mediate orientation-based visual search tasks. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 40, S349.

*66. Laurinen, P. I. and Olzak, L. A. (1999) Contrast-Contrast: More evidence for two gain control pools. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 40, S44.

*67. Bredfelt, C. E., Olzak, L. A., and Thomas, J. P. (1999). Normalization in orientation summation occurs after binocular summation. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 40, S43.

*68. Olzak, L. A. and Laack, K. A. (1999) Higher-level summing circuits mediate orientation-based visual search tasks II. Paper presented at the 22st European Conference on Visual Perception, Trieste, Italy. Perception, 28s, 56.

*69. Laurinen, P. I. and Olzak, L. A. (1999) No evidence for lateral contrast gain control among non-Fourier, contrast modulated components. Paper presented at the 22st European Conference on Visual Perception, Trieste, Italy. Perception, 28s, 40.

*70. Olzak, L. A. and Laurinen, P. I. (1999) Multiple normalization processes in contrast-contrast phenomena. Invited Paper presented at the Optical Society of America Meeting, Santa Clara, CA. Supplement to OPN Optics & Photonics News, p. 62.

*71. Thomas, J. P. and Olzak, L. A. (1999) Bandwidth of orientation coding mechanisms for lateral separation. Paper presented at the Optical Society of America Meeting, Santa Clara, CA. Supplement to OPN Optics & Photonics News, p. 62.

*72. Piehler, O. C., Pantle, A. J., and Olzak, L. A. (1999) Properties of direction-specific contrast gain control. Paper presented at the Optical Society of America Meeting, Santa Clara, CA. Supplement to OPN Optics & Photonics News, p. 56

*73. Olzak, L. A., Wickens, T. D. and Thomas, J. P. (2000) Gain control or neural noise? Distinguishing between two classes of model. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 3795.

*74. Laurinen, P. I. and Olzak, L. A. (2000) Contrast-contrast between contrast-modulated patterns can be explained by Fourier energy alone. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 41, 4245.

*75. Olzak, L. A., Wickens, T. D. and Thomas, J. P. (2000) An early-noise model of complex pattern discrimination. Invited paper presented at the 23rd European Conference on Visual Perception, Groningen, The Netherlands.   Perception, 29s, 120.

*76. Laurinen, P. I., Saarela T. and Olzak, L.. A. (2000) Contextual modulation of lateral interactions in contrast gain control. Paper presented at the 23rd European Conference on Visual Perception, Groningen, The Netherlands. Perception, 29s, 41.

*77. Olzak, L. A., Wickens, T. D. and Thomas, J. P. and (2000) An alternative to pooled gain control models. Paper presented at the Optical Society of America Meeting, Providence, RI. Supplement to OPN Optics & Photonics News, p. 53.

*78. Olzak, L. A., High, J. L., and Laurinen, P. I. (2001) Lateral gain control in contrast discrimination judgments. Paper to be presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 42, 853.

*79. Laurinen, P. I., Saarela, T., and Olzak, L. A. (2001) Contrast-contrast is spatially asymmetric. Paper to be presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL. Supplement to Investigative Ophthalmology & Visual Science, 42, 852.

*80.  Olzak, L. A. (2001)  Contextual modulation effects in apparent contrast, contrast discriminations, and spatial frequency discriminations.  Paper presented at Optical Society of America/UCI Color and Vision Meeting, Irvine, CA.  Optics Express, 9(8), in press.

 

 *81.  Olzak, L. A. (2002)  Contextual modulation affects orientation discriminations differently than spatial frequency or contrast discriminations.  Paper presented at the Association for Research in  Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL.  Supplement to Investigative Ophthalmology & Visual Science, 43, in press.         

 

*82.  Olzak, L. A. (2002)  Models of Lateral Interaction:  A failure to generalize.  Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  Journal of Vision, 2, in press.

           

*83.  Olzak, L. A.., Clark, A.. M., and Laurinen, P. I. (2002)   Properties of mechanisms underlying contextual effects in fine discrimination tasks.  Paper  presented at  the  25th  European Conference on Visual Perception, Glasgow, Scotland.  Perception, 31s, 64.

 

*84  Laurinen, P. I., Saarela, T., & Olzak, L. A.. (2002)  Contrast-Contrast:  Brightness Induction or Lateral Gain Control?  Paper  presented at  the  25th  European Conference on Visual Perception, Glasgow, Scotland.  Perception, 31s, 50.

           

*85  Saarela, T.. P, Laurinen, P. I., and Olzak, L. A. (2002)  Spatial pooling of contrast and luminance signals in contrast gain control.  Paper  presented at  the  25th  European Conference on Visual Perception, Glasgow, Scotland.  Perception, 31s, 63.

 

*86.  Olzak, L. A.  (2002)  The role of a gap in contextual effects on discrimination performance. .  Paper to be presented at Optical Society of America/UCI Color and Vision Meeting, Irvine, CA.  Journal of Vision, 2(10), 104a, http://journalofvision.org/2/10/104/, DOI 10.1167/2.10.104.

 

*87.  Olzak , L. A., Saylor, S. A., Gabree, S. H,  and Laurinen, P. I. (2003)  Lateral Interactions on Discriminations Performance by Simple and Complex Surrounds.  Paper presented at the Association for Research in  Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL.  Invest. Ophthalmol. Vis. Sci. 2003 44: E-Abstract 4317.

           

*88.  Olzak, L. A. and Gabree, S. H. (2003)  .Relative effects of superimposed and lateral masks in discrimination.   Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  [Abstract]. Journal of Vision, 3(9), 650a, http://journalofvision.org/3/9/650/, doi:10.1167/3.9.650.

 

*89.  Saylor, S. A. and Olzak, L. A. (2003) Do lateral influences cross segmentation boundaries?  Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  [Abstract]. Journal of Vision, 3(9), 651a, http://journalofvision.org/3/9/651/, doi:10.1167/3.9.651.

 

*90.  Laurinen, P. I., Olzak, L. A.,  and Saarela, T. (2003) Complex contextual effects on apparent contrast.  Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  [Abstract]. Journal of Vision, 3(9), 348a, http://journalofvision.org/3/9/348/, doi:10.1167/3.9.348.

 

*91.  Olzak L. A., Saylor S. A. and Laurinen, P. I. (2003)  What stops lateral interactions in discrimination tasks?  Paper presented at the  26th  European Conference on Visual Perception, Paris, France.  Perception, 32s, , http://www.perceptionweb.com/perception/ecvp03/0751.html.

 

*92.  Laurinen, P. I., Olzak, L. A. and Saarela, T. P.  (2003) Exploring alternatives in contrast-contrast phenomena.  Paper presented at  the  26th  European Conference on Visual Perception, Paris France.  Perception, 32s, http://www.perceptionweb.com/perception/ecvp03/0991.html.

           

*93.  Saarela, T. P., Olzak, L. A., Laurinen, P. I. (2003)   Orientation-dependent spatial asymmetry of surround suppression in contrast perception.  Paper presented at  the  26th  European Conference on Visual Perception, Paris, France.  Perception, 32s, http://www.perceptionweb.com/perception/ecvp03/0976.html.

 

*94.  Olzak, L. A., Saylor, S. A., and Gabree, S. H. (2003)   Scene segments, surrounds, and superimposed masks:  Complex interactions among pattern masks on discrimination performance.  Paper presented at Optical Society of America Fall  Vision Meeting. Optical Society of AmericaTucson, AZ  Journal of Vision, 3(12), 11a, http://journalofvision.org/3/12/11/, doi:10.1167/3.12.11.

 

*95.  Olzak, L. A. and Gabree, S. H. (2004)  Orientation Bandwidths of Lateral Interactions in Orientation Discriminations. Paper presented at the Association for Research in Vision and Ophthalmology Annual Meeting, Fort Lauderdale, FL.  Invest. Ophthalmol. Vis. Sci. 2004 45: E-Abstract 4660.

 

*96.  Olzak, L. A., Gabree, S. H., & Laurinen, P. I. (2004). Lateral interactions in orientation discrimination: Spatial frequency bandwidths [Abstract]. Paper presented at the Vision Sciences Annual Meeting, Sarasota, FL. Journal of Vision, 4(8), 776a, http://journalofvision.org/4/8/776/, doi:10.1167/4.8.776.

           

*97.  Laurinen, P. I., Olzak, L. A., & Saarela, T. P. (2004). Testing a neural model of center-surround interaction psychophysically [Abstract]. Paper presented at the Vision Sciences Annual Meeting, Sarasota, FL. Journal of Vision, 4(8), 780a, http://journalofvision.org/4/8/780/, doi:10.1167/4.8.780.

 

*98.  Olzak, L. A., Gabree, S. H., and Laurinen, P. I.  (2004)  Lateral Interactions: Orientation and Spatial Frequency Bandwidths in Fine Spatial Discriminations.  Paper presented at  the  27th  European Conference on Visual Perception, Budapest, Hungary.  Perception, 33s, 177.

 

*99.  Laurinen, P. I., Olzak, L. A., and Saarela, T. P. (2004)  Nonlinear interactions between gaps and contrast determine apparent contrast.  Paper presented at  the  27th  European Conference on Visual Perception, Budapest, Hungary.  Perception, 33s, 173.

 

*100.  Olzak, L. A., Gabree, S, H., and Laurinen, P. I (2004)  Center-surround interactions are not reciprocal.   Paper presented at Optical Society of America Fall Vision Meeting. Optical Society of AmericaRochester, N. Y.  Journal of Vision, 4(11), 74a, http://journalofvision.org/4/11/74/, doi:10.1167/4.11.74.

 

*101  Olzak, L. A., Gabree, S. H., and Laurinen, P. I. (2005)  Modeling lateral interaction in fine spatial discriminations:  The plot thickens.  Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  [Abstract]. Journal of Vision, in press.

 

*102.  Laurinen, P. I., Olzak, L. A., and Saarela, T. P. (2005)  Summation processes in contrast-contrast.  Paper presented at the Vision Sciences Society Annual Meeting, Sarasota, FL.  [Abstract]. Journal of Vision, in press.

 

*103.  Olzak, L. A., Laurinen, P. I., and Saarela, T. P.  For better or worse:  Reconciling differences across lateral interaction tasks.  Paper presented at  the  28th  European Conference on Visual Perception, A Coruna, Spain.  Perception, 34s, in press.

 

*104.  Laurinen P. I., Olzak L. A., Nurminen,  L. O. and Pihlaja,  M. E.   Does surround size matter in contrast gain control?  Paper presented at  the  28th  European Conference on Visual Perception, A. Coruna, Spain.  Perception, 34s, in press.