Our Research

Publications, conference proceedings, and abstracts:

Color Vision Research
Driving Research
Input Device Research
Reading Research

Chaparro, A., Stromeyer, C.F. III, Chen, G. & Kronauer, R.E. (1995). Human cones appear to adapt at low light levels: measurements on the red-green detection mechanism. Vision Research, 35, 3103- 3118.

Chaparro, A., Stromeyer, C.F. III, Eskew, R.T., Huang, E.P. & Kronauer, R.E. (1994). Separable red- green and luminance detectors for small flashes. Vision Research, 34, 751-762.

Chaparro, A., Stromeyer, C.F. III, Huang, E.P., Kronauer, R.E. & Eskew, R.T. (1993). Colour is what the eye sees best. Nature, 361, 348-350.

Chaparro, A. & Stromeyer, C.F., Kronauer, R.E. & Cavanagh, P. (1997). Effects of static gratings on motion detection thresholds. Proceedings of the Annual Meeting of the Optical Society of America.

Eskew, R.T., Stromeyer, C.F. III , Chaparro, A. & Kronauer, R.E. (1992). Why is chromatic sensitivity greater than luminance sensitivity? Technical Digest Optical Society of America.

Stromeyer, C.F. III & Chaparro, A. (1992). Display intensity-resolution required for measuring visual discriminations. Digest of Society of Information Display, 23, 247-250.

Stromeyer, C.F. III, Chaparro, A., Rodriguez, C., Chen, D., Hu, E. & Kronauer, R.E. (1998). Short- wave cones signal in the red-green detection mechanism. Vision Research, 813-826.

Stromeyer, C.F. III, Chaparro, A., Tolias, A.S. & Kronauer, R.E. (1997). Phase shifts between long- wave and middle-wave cone signals in human luminance and red-green mechanisms. Journal of Physiology, 499, 227-254.

Stromeyer, C.F. III, Gowdy, P.D., Chaparro, A., & Kronauer, R.E. (1999). Second-site adaptation in the red-green detection pathway: Only elicited by low-spatial frequency test. Vision Research, 39, 3011-3023.

Stromeyer, C.F. III, Thabet, R., Chaparro, A. & Kronauer, R.E. (In preparation). Spatial masking does not reveal mechanisms jointly tuned for luminance and red-green color.

Stromeyer, C.F. III, Kronauer, R.E., Ryu, A., Chaparro, A. & Eskew, R.T. (1994). Contributions of human long-wave and middle-wave cones to motion detection. Journal of Physiology, 485.1, 221-243.

Stromeyer, C.F. III, Gowdy, P.D., Chaparro, A., Kladakis, S. Willen, J.D. & Kronauer, R.E. (submitted). Colour adaptation modifies the temporal properties of the long-wave and middle-wave cone signals in the human luminance mechanism. Journal of Physiology.

Zemany, L. Stromeyer, C.F. III, Chaparro, A. & Kronauer, R.E. (1998). Motion detection on flashed, stationary pedestal gratings: Evidence for an opponent-motion mechanism. Vision Research,.38, 795- 812.

Chaparro, A., Thabet, R., Stromeyer, C.F., & Kronauer, R.E. (1996). Spatial masking: Mechanisms jointly tuned to color and luminance. Investigative Ophthalmology and Visual Sciences, 37 (suppl.).

Chaparro, A., Stromeyer, C.F., Zemany, L. & Kronauer, R.E. (1997). Opponent-motion detection contours measured with a static, flashed pedestal grating. Investigative Ophthalmology and Visual Sciences, 38 (suppl.).

Chaparro, A., Stromeyer, C.F., Gowdy, P.D. & Kronauer, R.E. (1998) Spatial frequency controls second-site adaptation in the red-green detection pathway. Investigative Ophthalmology and Visual Sciences. 39 (suppl.).

Chaparro, A., Stromeyer, C.F., Kronauer, R.E., Hu, E., Kladakis, S. & Rodriguez, C. (1995) Investigative Ophthalmology and Visual Sciences, 36 (suppl.).

Chaparro, A., Stromeyer, C.F., Chen, G. & Kronauer, R.E. (1994). Equal weberian adaptation of the L and M cone signals at low illuminance. Investigative Ophthalmology and Visual Sciences, 35 (suppl.).

Chaparro, A., Stromeyer, C.F., Eskew, R.T. & Kronauer, R.E. (1993). Cone-selective adaptation form equiluminance red-green flashes on colored fields of moderate intensity (400 trolands). Investigative Ophthalmology and Visual Sciences, 33 (suppl.).

Chaparro, A., Stromeyer, C.F., Eskew, R.T. & Kronauer, R. E. (1992). The detection efficiency of chromatic stimuli is greater than luminance stimuli. Investigative Ophthalmology and Visual Sciences, 33 (suppl.).

Chaparro, A., Stromeyer, C.F., Eskew, R.T., Huang, E.P. & Kronauer, R.E. (1991). Relative sensitivity of red-green and luminance mechanisms for small spots. Investigative Ophthalmology and Visual Sciences, 32 (suppl.).

Chaparro, A. Groff, L., Kamala, T., Sifrit, K. (1999). Maintaining situational awareness: The role of visual attention. Proceedings of the Human Factors and Ergonomics Society 43nd Annual Meeting.

Eskew, R.T., Stromeyer, C.F. III, Chaparro, A., & Kronauer, R.E. (1992). Facilitation of red-green detection by luminance pedestals as small spots sizes. Investigative Ophthalmology and Visual Sciences, 32 (suppl.).

Stromeyer, C.F. III, Chaparro, A., & Kronauer, R.E. (1996). The color and motion of moving-colored patterns are processed independently?. Investigative Ophthalmology and Visual Sciences, 37 (suppl.)

Stromeyer, C.F. III, Chaparro, A., Tolias, A.S. & Kronauer, R.E. (1994). Equiluminant settings change Markedly with temporal Frequency. Investigative Ophthalmology and Visual Sciences, 36 (suppl.)

Stromeyer, C.F. III, Chaparro, A., Tolias, A.S. & Kronauer, R.E. (1994). Colored fields produce large L vs M phase shifts in luminance motion mechanism. Investigative Ophthalmology and Visual Sciences, 35 (suppl.).

Stromeyer, C.F. III, Zemany, L., Chaparro, A. & Kronauer, R.E. (1997). Static pedestal gratings can facilitate forward or reversed motion: an opponent-motion mechanism. Investigative Ophthalmology and Visual Sciences, 38 (suppl.).

Driving Research

Chaparro, A. & McGregor. (1998). Driving habits of older adults with visual impairment. Proceedings of the Human Factors and Ergonomics Society 42nd Annual Meeting.

Chaparro, A., Groff, L., Tabor, K., Sifrit, K., & Gugerty, L. (1999). Correlation between measures of situational awareness and the UFOVŽ test. Investigative Ophthalmology and Visual Sciences, 40 (suppl.).

Chaparro, A. Groff, L., Kamala, T., Sifrit, K. (1999). Maintaining situational awareness: The role of visual attention. Proceedings of the Human Factors and Ergonomics Society 43nd Annual Meeting.

McGregor, L.N., Hackworth, M.D. & Chaparro, A. (1998). Driving habits of the visually impaired. Investigative Ophthalmology and Visual Sciences, 39 (suppl.).

Input Device/ Motor Control Research

Chaparro, A., Bohan, M., Scarlett, D.S. Fernandez, J.E., & Choi, S.D. (In Press). The effect of age on computer input device use: Performance and ratings of perceived exertion. SAE Technical Paper Series.

Chaparro, A., Rogers, M., Fernandez, J., Bohan, M. & Choi, S. (submitted). Range of motion of the wrist: Implications for Designing computer input devices for the elderly. Disability and Rehabilitation.

Chaparro, A., Bohan, M., Fernandez, J.E., Kattel, B. & Choi, S.D. (1999). The Impact of age on computer input devices: Performance and Preference. The International Journal of Industrial Ergonomics. 24, 503-513.

Chaparro, A., Bohan, M., Fernandez, J.E., Choi, S.D. & Kattel, B. (1999). Cursor-control performance of older adults using two computer input devices. Journal of Occupational Rehabilitation, 9, 33-43.

Chaparro, A. & Bohan, M. (1998). Computer Input Device Selection. In Industrial and Occupational Ergonomics: Users Encyclopedia (on CD ROM). Ed. A. Mital et al. Published by International Journal of Industrial Engineering.

Bohan, M. & Chaparro, A. (1998). To click or not to click: A comparison of two target-selection methods during HCI. Conference on Human Computer Interaction.

Bohan, M. & Chaparro, A. (1998). Age-related differences in performance using a mouse and trackball. Proceedings of the Human Factors and Ergonomics Society 42nd Annual Meeting.

Bohan, M. Chaparro, A., Fernandez, J., Kattel, B. & Choi, S.D. (1998). Cursor-control performance of older adults using two computer input devices. In Advances in Occupational Ergonomics and Safety X. S. Kumar (Ed). Washington DC: IOS Press.

Bohan, M., Chaparro, A. & Scarlett, D. S. (submitted). A psychomotor comparison of Finger- and Thumb-operated computer trackball devices for use by younger and older adults. Human Factors.

Bohan, M., Phipps, C. A., Chaparro, A, & Halcomb, C. (in press). A psychophysical comparison to two stylus-driven soft keyboards. Proceedings of Graphics Interface, 99.

Reading Research

Chaparro, A. & Young, R.S.L. (1993). Reading with rods: The superiority of central vision for rapid reading. Investigative Ophthalmology and Visual Science, 34, 2341-2347.

Chaparro, A. & Young, R.S.L. (1989). Reading with the rod visual system. Applied Optics, 28, 1110- 1114.

Young, R.S.L., Chaparro, A., Price, J. & Walters, J. (1989). Oscillatory potentials of x-linked carriers of congenital stationary night blindness. Investigative Ophthalmology and Visual Science, 30, 806-812.

Chaparro, A. & Young, R.S.L. (1988). Reading with the rod visual system. Noninvasive Assessment of the Visual System Technical Digest (Optical Society of America), Lake Tahoe, Nevada.

Liao, C. & Chaparro, A. (1998). The effect of text orientation on reading. Investigative Ophthalmology and Visual Sciences, 39 (suppl.).

Young, R.S.L., Chaparro, A., Price, J. & Walters, J. (1988). Power spectrum of oscillatory potentials in carriers of X-linked form of congenital stationary night blindness. Noninvasive Assessment of the Visual System Technical Digest (Optical Society of America), Lake Tahoe, Nevada.

Chaparro, A. & Young, R.S.L. (1990). Characteristics of rod reading performance. Investigative Ophthalmology and Visual Sciences, 31 (suppl.).

Chaparro, A. & Young, R.S.L. (1989). Performance of a rod monochromat as a function of text luminance. Investigative Ophthalmology and Visual Science, 30, (suppl).

Young, R.S.L., Chaparro, A., Price, J. & Walters, J. (1988). Discrimination of X-linked carriers of CSNB from normals. Investigative Ophthalmology and Visual Science, 29, (suppl).

For more information contact:
Alex Chaparro