Research Experience
Research Psychologist NASA Ames Research Center; 9/99-present
Scientist San Jose State University Foundation at NASA Ames Research Center; 6/95-9/99
Research Associate Univ. of California, Berkeley, CA, Optometry Department; 8/92-12/97
Research Associate Univ. of California, Berkeley, CA Division of Neurobiology; 3/96-12/96
Research Associate University of Houston, School of Optometry, Houston, TX; 8/91-8/92
Senior Staff Scientist Vision Sciences Research Corporation, San Ramon, CA; 8/89-8/91
Assistant Professor State Univ. of New York, School of Optometry, New York, NY; 8/88-8/89
Assistant Professor Western Kentucky Univ., Dept. of Psych., Bowling Green, KY; 8/85-8/88
Journal Publications
[19] Beard, B.L. & Ahumada, A.J. (1999) Detection in fixed and random noise in foveal and parafoveal vision explained by template learning. Journal of the Optical Society of America A, 16, 755-763.
[18] Barth, E., Beard, B.L. & Ahumada, A.J. (1999) Nonlinear features in vernier acuity. To be published in B.E. Rogowitz and T.N. Pappas, eds., Human Vision and Electronic Imaging IV, SPIE Proceedings Vol. 3644, paper 8, 1999.
[17] Westheimer, G. & Beard, B.L. (1998) Orientation dependency for foveal line stimuli: orientation discrimination, vernier acuity, resolution, detection and intensity discrimination. Vision Research, 38(8), 1097-1103.
[16] Beard, B.L. & Ahumada, A.J. (1998) Technique to extract relevant image features for visual tasks. B. E. Rogowitz and T. N. Pappas, eds., Human Vision and Electronic Imaging III SPIE Proceedings Vol. 3299, pp. 79-85.
[15] Ahumada, A.J., Beard, B.L. & Eriksson, R. (1998) Spatio-temporal discrimination model predicts temporal masking functions. B. E. Rogowitz and T. N. Pappas, eds., Human Vision and Electronic Imaging III SPIE Proceedings Vol. 3299, pp. 120-127.
[14] Ahumada, A.J. & Beard, B.L. (1998) A simple vision model for inhomogeneous image quality assessment. SID Digest of Technical Papers, 29, Paper 40.1.
[13] Beard, B.L., Klein, S.A. & Carney, T. (1997) Motion thresholds can be predicted from contrast discrimination. Journal of the Optical Society of America A, 14(9), 2449-2470.
[12] Ahumada, A. & Beard, B.L. (1997) Image discrimination models predict detection in fixed but not random noise. Journal of the Optical Society of America A, 14(9), 2471-2476.
[11] Beard, B.L., Levi, D.M. & Klein, S.A. (1997) Vernier acuity with non-simultaneous targets: the cortical magnification factor estimated by psychophysics. Vision Research, 37(3), 325-346.
[10] Ahumada, A.J. & Beard, B.L. (1997) Image discrimination models: detection in fixed and random noise. Proceedings of IS&T/SPIE Electronic Imaging Symposium, February 8, 1997, San Jose CA, Paper # 3016-03.
[9] Ahumada, A.J. & Beard, B.L. (1996) Object detection in a noisy scene. in B. Rogowitz and J. Allebach, eds., Human Vision, Visual Processing, and Digital Display VII, SPIE Proc. Vol. 2657 (paper 23), Bellingham, WA: SPIE.
[8] Beard, B.L., Levi, D.M. & Reich, L.N. (1995) Perceptual learning in parafoveal vision. Vision Research, 35(12), 1679-1690.
[7] Levi, D.M., Waugh, S.J. & Beard, B.L. (1994) Spatial scale shifts in amblyopia. Vision Research, 34, 3315-3333.
[6] Beard, B.L., Yager, D. & Neufeld, S. (1994) Contrast detection and discrimination in young and older adults. Optometry & Vision Science, 71, 783-791.
[5] Yager, D. & Beard, B.L. (1994) Age differences in spatial contrast detection: subjects' criteria and psychophysical performance. Optometry & Vision Science, 71, 778-782.
[4] Beard, B.L. (1993) Effects of visual training on parafoveal Vernier and resolution acuity. Ophthalmic and Physiological Optics/Noninvasive Assessment of the Visual System, Technical Digest, Series 3, 360-363.
[3] Ball, K.K., Owsley, C. & Beard, B.L. (1990) Clinical visual perimetry underestimates peripheral field problems in older adults. Clinical Vision Science, 5, 2210-2219.
[2] Ball, K.K., Beard, B.L., Roenker, D.L., Miller, R.L. & Griggs, D.S. (1988) Age and visual search: expanding the useful field of view. Journal of the Optical Society of America A, 5, 2210-2219.
[1] Kitterle, F.L. & Beard, B.L. (1983) The effects of flicker adaptation upon temporal contrast enhancement. Perception and Psychophysics, 33, 75-78.
Scientific Conference
Presentations & Abstracts
[35] Beard, B.L. and Ahumada, A.J. (2000) Response classification images
for parafoveal vernier acuity.Investigative
Ophthalmology and Visual Science, 41, 804.
[34] Beard, B.L. and Ahumada, A.J. (1999) Stimulus classification images
for vernier acuity: the periphery, the oblique effect, and feature polarity.
OSA Annual Meeting, Technical Digest Series, 67.
[33] Beard, B.L. (1998) Characterizing internal template representations
using response
correlation images. Presented at the
Twenty-Third Annual Interdisciplinary Conference
in Teton Village, Jackson Hole, Wyoming.
[32] Ahumada, A. J. and Beard, B.L. (1998) Measuring how well
classification images account for visual discrimination performance.
Abstracts of the Psychonomics Society, 3, 38.
[31] Beard, B.L. & Ahumada, A.J. (1998) A visual detection
template learning model. OSA Annual Meeting Technical Digest Series,
9, 56.
[30] Ahumada, A.J. & Beard, B.L. (1998) Masking by compound
gratings predicted by an image sequence discrimination model.
Perception, 27,7. (Presented at the European Conference on Visual
Perception - ECVP - in Oxford, England)
[29] Beard, B.L. & Ahumada, A.J. (1998) Template learning
model predicts effects of fixed versus random noise in visual
signal detection. Perception, 27, 82. (Presented at the European Conference
on Visual
Perception - ECVP - in Oxford, England)
[28] Beard, B.L. & Ahumada, A.J. (1998) Performance and learning
rate for object detection in fixed and random noise. Investigative
Ophthalmology and Visual Science, 39, 913.
[27] Ahumada, A.J. & Beard, B.L. (1998) Response classification
images in vernier acuity. Investigative Ophthalmology and Visual
Science, 39, 1109.
[26] Beard, B.L. & Ahumada, A.J. (1998) A technique to extract
the relevant features for visual tasks. Electronic Imaging: Science
and Technology, 20.
[25] Ahumada, A.J., Beard, B.L. & Eriksson, R. (1998) Spatiotemporal
discrimination model predicts temporal masking functions. Electronic
Imaging: Science and Technology, 20.
[24] Beard, B.L. & Ahumada, A.J. (1997) Fixed pattern noise
advantage absent in the periphery. OSA Annual Meeting, Technical
Digest Series, 11, 69.
[23] Ahumada, A.J. & Beard, B.L. (1997) Calibration of a spatiotemporal
discrimination model from forward, simultaneous, and backward
masking. Perception, 26, 34. (Presented at the European
Conference on Visual Perception - ECVP - in Helsinki-Espoo, Finland)
[22] Ahumada, A.J. & Beard, B.L. (1997) Parafoveal Target
Detectability Predicted by Local Luminance and Contrast Gain Control.
Investigative Ophthalmology and Visual Science, 38, 380.
[21] Beard, B.L. & Ahumada, A.J. (1997) Relevant image features
for Vernier acuity. Perception, 26, 118. (Presented at the European
Conference on Visual Perception - ECVP - in Helsinki-Espoo, Finland)
[20] Beard, B.L. & Ahumada, A.J. (1997) Orientation tuning
unchanged by vernier acuity practice. Investigative Ophthalmology
and Visual Science, 38, 962.
[19] Beard, B.L. & Ahumada, A.J. (1996) Tuning function changes
after practice on a parafoveal Vernier acuity task. Perception,
26, 38. (Presented at the European Conference on Visual
Perception - ECVP - in Strasbourg, France)
[18] Beard, B.L., Ahumada, A.J., Klein, S.A. & Slotnick, S.D.
(1996) Training on a vernier acuity task does transfer to untrained
retinal locations. Investigative Ophthalmology and Visual Science,
37(3), 696.
[17] Ahumada, A.J. & Beard, B.L. & Watson, A.B. (1996)
Image discrimination models with contrast gain control predict
target detection in fixed and random noise. Investigative Ophthalmology
and Visual Science, 37(3), 233.
[16] Beard, B.L., Klein, S.A., Ahumada, A.J. & Slotnick, S.
(1996) Training on a vernier acuity task does transfer to untrained
retinal locations. Investigative Ophthalmology and Visual Science,
37, S696.
[15] Klein, S.A, Beard, B.L. & Carney, T. (1995) Motion mechanisms
and contrast mechanisms have similar saturation behavior. Optics
and Photonics News, 6, 64.
[14] Ahumada, A.J. & Beard, B.L. (1995) Image discrimination
models with stochastic channel selection. Optics and Photonics
News, 6, 138.
[13] Beard, B.L., Klein, S.A. & Tyler, C. (1995) Hard thresholds
vs. accelerating transducer in contrast detection. Investigative
Ophthalmology and Visual Science, 36, S904.
[12] Beard, B.L., Klein, S.A. & Levi, D.M. (1994) Temporal
overlap constrains abutting vernier thresholds. Investigative
Ophthalmology and Visual Science, 35, 2065.
[11] Beard, B.L., Klein, S.A. & Carney, T. (1993) Motion discrimination
is predicted by detection thresholds at low but not high spatial
frequencies. Investigative Ophthalmology and Visual Science, 34,
1035.
[10] Reich, L., Beard, B.L. & Levi, D.M. (1993) Two types
of learning in parafoveal spatial vision. Investigative Ophthalmology
and Visual Science, 34, 776.
[9] Beard, B.L., Levi, D.M. & Klein, S.A. (1992) Spatiotemporal
properties of localization mechanisms. Investigative Ophthalmology
and Visual Science, 33, 958.
[8] Yager, D., Beard, B.L. & Neufeld, S. (1992) Contrast matching
as a function of age. Investigative Ophthalmology and Visual Science,
33, 1415.
[7] Levi, D.M., Waugh, S & Beard, B.L. (1992) Orientation
masking and vernier acuity in strabismic amblyopes. Investigative
Ophthalmology and Visual Science, 33, 870.
[6] Beard, B.L., Neufeld, S. & Yager, D. (1990) Age related
reductions in sensitivity are not evident at suprathreshold contrast
levels. Investigative Ophthalmology and Visual Science, 31, 11.
[5] Ball, K.K., Owsley, C., Beard, B.L., Roenker, D. & Ball,
D. (1989) Age and functional vision as related to everyday performance.
Investigative Ophthalmology and Visual Science, 30, 408.
[4] Beard, B.L. (1988) Spatial-frequency channel interactions:
the effect of contrast. OSA Annual Meeting, Technical Digest Series,
Vol. 11.
[3] Ball, K.K., Beard, B.L., Roenker, D., Miller, R.L. & Ball,
D. (1988) Visual search: age and practice. Investigative Ophthalmology
and Visual Science, 29, 448.
[2] Ball, K.K., Beard, B.L., Roenker, D. & Miller, R.L. (1987)
Modelling irregularities in the direction discrimination function.
Investigative Ophthalmology and Visual Science, 28, 298.
[1] Prestrude, A.M. & Beard, B.L. (1981) Visual sensitivity
of redheaded observers. Investigative Ophthalmology and Visual
Science, 20, 205.
Invited Talks
"Tuning function changes after practice on a parafoveal Vernier
acuity task". For the Special Symposium on Hyperacuity at
the European Conference on Visual Perception in Teubingen, Germany,
1996.
"Perceptual learning on visual resolution and vernier acuity
tasks". University of Houston, Houston, TX, 1992.
"Limits and endurance of perceptual learning". Syracuse
University, Department of Psychology, Syracuse, NY, 1989.
"Temporal integration in contrast masking". University
of Alabama, Psychology Department, Birmingham, AL, 1988.
San Jose State University, San Jose, CA, Psychology Department
- "Perception", Spring 1997
- "Sensation and Perception", Winter 1996
- "Group Dynamics", Spring 1996
- "Cognitive Development", Spring 1996, Winter 1995
- "Senior Research Seminar", Spring 1996, Winter 1995
- "Evolutionary Ethics", Spring 1996
- "Visual Perception", Winter 1995
- "Life-Span Development", Fall 1995, Winter 1995
- "Psychobiology", Fall 1995
- "Cognitive Development", Spring 1996, Winter 1995
- "Physiological Psychology", Fall 1988
- "Psychological Principles", Fall 1985-Fall 1988 (7 courses)
- "Psychological Principles", Fall 1985-Fall 1988 (7 courses)
- "Introduction to Psychology", Spring 1984-Spring 1985 (4 courses)
Honors and Awards
SBIR I "Discomfort glare system". Co-investigator, 1991.
SBIR I "Standardized technique for vision improvement". Co-investigator, 1990.
Research Grant from the Optometric Association: "Suprathreshold contrast perception in the elderly", 1989.
Schnurmacher Institute Research Grant, 1988.
Professional Services
- 1998 Optical Society of America Special Symposium on Perceptual
Learning
Review journal articles for:
- Vision Research
- Investigative Ophthalmology and Visual Science
- Journal of the Optical Society of America A
- Perception & Psychophysics
- Spatial Vision
- Journal of Neuroscience
- Investigative Ophthalmology and Visual Science
Review grants for National Institutes of Health
References
|
Dr. Albert J. Ahumada, Jr. NASA Ames Research Center Mail Stop 262-2 Moffett Field, CA 94035-1000 650-604-1327 al@vision.arc.nasa.gov |
Dr. Dennis M. Levi University of Houston College of Optometry 4901 Calhoun Blvd Houston, TX 77204-6052 713-743-2024 DLEVI@UH.edu |
|
Dr. Stanley A. Klein University of California School of Optometry 360 Minor Hall Berkeley, CA 94720-2020 510-643-8670 klein@adage.berkeley.edu |
Dr. Jeffrey B. Mulligan NASA Ames Research Center Mail Stop 262-2 Moffett Field, CA 94035-1000 650-604-3745 jbm@vision.arc.nasa.gov |
|
Prof. Dr. Gerald Westheimer Division of Neurobiology University of California 321 Life Sciences Addition Berkeley, CA 94720-3200 510-642-4828 2 gwest@violet.berkeley.edu |
Dr. Dean Yager State University of New York College of Optometry 100 E 24th St. New York, NY 10010 212-780-5141 dyager@sunyopt.edu |
Return to Tina's
homepage.