Alejandro Lleras

Assistant Head for Diversity and Inclusion

Research Interests

  • Attention
  • Vision
  • Awareness

Research Description

My work is focused on understanding attention, both how it works and how it fails, mostly in the visual domain. I have studied issues such as temporal attention, why we tend to get distracted when we concentrate over long periods of time, how we tune out the world when we are trying to concentrate, and how it is that we find objects in a scene.

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Vision Lab Link


Google Scholar Profile


Ph.D. from the Pennsylvania State University, 2002

Awards and Honors

CAREER award recipient from National Science Foundation

Additional Campus Affiliations

Professor, Beckman Institute for Advanced Science and Technology

Recent Publications

Lleras, A., Wang, Z., Madison, A., & Buetti, S. (2019). Predicting Search Performance in Heterogeneous Scenes: Quantifying the Impact of Homogeneity Effects in Efficient Search. Collabra: Psychology, 5(1), 2.

Ng, G. J. P., Buetti, S., Dolcos, S., Dolcos, F., & Lleras, A. (Accepted/In press). Distractor rejection in parallel search tasks takes time but does not benefit from context repetition* Visual Cognition.

Madison, A., Lleras, A., & Buetti, S. (2018). The role of crowding in parallel search: Peripheral pooling is not responsible for logarithmic efficiency in parallel search. Attention, Perception, and Psychophysics, 80(2), 352-373.

Ng, G. J. P., Lleras, A., & Buetti, S. (2018). Fixed-target efficient search has logarithmic efficiency with and without eye movements. Attention, Perception, and Psychophysics, 80(7), 1752-1762.

Wang, Z., Lleras, A., & Buetti, S. (2018). Parallel, exhaustive processing underlies logarithmic search functions: Visual search with cortical magnification. Psychonomic Bulletin and Review, 25(4), 1343-1350.

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