The primary aim of my current research is to understand the neural mechanisms associated with social and cultural influences on human cognition, subjective experience and action. Currently, we are using high-density EEG electrode arrays and functional near infrared spectroscopy to investigate the spatial and temporal parameters of neural activity associated with social and cultural factors.

1) Culture

In collaboration with Sharon Goto, we are exploring the neurocognitive mechanisms associated with cultural differences of the self.

Goto, S.G., Cho, H.J., Park, G., Coyiuto, S.M. & Lewis, R.S. (2022). The neural processing of social norms in bicultural: The relation between cultural tightness and semantic processing.  Biological Psychology.

Goto, S.G., Lewis, R.S., & Grayzel-Ward (in press).  Culture and self-construal.  To appear in Chiao, J., Li, S., Turner, B., Lee, S. & Pringle, B. (Eds.) Oxford University Press Handbook of Cultural Neuroscience and Global Mental Health (2nd edition).  Oxford: Oxford University Press.

Park, G., Lewis, R.S., Wang, Y.C., Cho, H.J. & Goto, S.G. (2018).  Are you mad at me? Early visual processing of anger and gaze among Asian American biculturals. Culture and Brain.

Fong, M., Goto, S.G., Zhao, T., Schudson, Z., Moore, C. & Lewis, R.S. (2014).  Switching between Mii and Wii: The effects of cultural priming on the social affective N400.  Culture and Brain, 2, 52-71.

Goto, S.G., Yee, A., Lowenberg, K. & Lewis, R.S. (2013).  Cultural differences in sensitivity to social context: Detecting affective incongruity using the N400.  Social Neuroscience, 8, 63-74.

Goto, S.G., Ando, Y., Huang, C., Yee, A. & Lewis, R.S.  (2010).  Cultural differences in the visual processing of meaning: Detecting incongruities between background and foreground objects using the N400. Social Cognitive & Affective Neuroscience, 5, 242-253.

Lewis, R.S., Goto, S.G., & Kong, L. (2008).  Culture and Context: East Asian American and European American Differences in P3 Event-Related Potentials. Personality and Social Psychology Bulletin, 34, 623-634.


2) Stress and Health

Lewis, R.S., Weekes, N.Y. & Guerrero, N. (2012).  Examination Stress and Working Memory.  In N.M. Seel (Ed.), The Encyclopedia of the Sciences of Learning (pp. 1195-1197).  New York: Springer Publishing.

Weekes, N.Y., Lewis, R.S. Goto, S.G., Garrison-Jakel, J., Patel, F. & Lupien, S.J.  (2008).  The effect of an environmental stressor on gender differences on the awakening cortisol responsePsychoneuroendocrinology. 33, 776-772.

Lewis, R.S. , Nikolova, A., Chang, D. L. & Weekes, N.Y.  (2008).  Examination stress and components of working memory. Stress, 11, 108-114.

Lewis, R.S., Weekes, N.Y. & Wang, T. (2007).   The effect of a naturalistic stressor on frontal EEG asymmetry, stress, and health.  Biological Psychology, 75, 239-247.

Weekes, N.Y., Lewis, R.S., Patel, F, Garrison-Jakel, J., Berger, D. & Lupien, S.  (2006).  Examination stress as an ecological inducer of cortisol and psychological responses to stress in undergraduate students, Stress, 9, 199-206.


3) Mild Head Injury

Babikian, T., Satz, P., Zaucha, Light, R., Lewis, R.S., McCleary, C., & Asarnow, R.F. (2011).  The UCLA study of neurocognitive outcomes following mild pediatric TBIJournal of the International Neuropsychological Society, 17, 886-895.

Light, R, Asarnow, R., Satz, P., Zaucha, K., McCleary, C. & Lewis, R.S. (1998). Mild closed-head injury in children and adolescents: behavior problems and academic outcomes, Journal of Consulting and Clinical Psychology, 66, 1023-1029.

Light, R.K., Satz, P., Asarnow, R.F., Lewis, R.S. Ribbler, A. & Neumann, E.  (1996).  Disorders of Attention.  In E.S. Batchelor & R.S. Dean’s Pediatric Neuropsychology: Interfacing Assessment and Treatment for Rehabilitation. (pp. 269-301).  Boston: Allyn & Bacon.

Asarnow, R.F., Satz, P., Light, R., Zaucha, K., Lewis, R.S. & McCleary, C. (1995).  The UCLA study of mild closed head injury in children and adolescents.  In  S. H. Broman & M.E. Michel (Eds.)  Traumatic Head Injury in Children (pp. 117-146).  New York: Oxford.

Asarnow, R.F., Satz, P., Light, R.K., Lewis, R.S., & Neumann, E. (1991). Behavior problems and adaptive functioning in children with mild and severe closed head injury.  Journal of Pediatric Psychology, 16, 543-555.

Nelson, L., Satz, P., Mitrushina, M., Van Gorp, W., Cicchetti, D., Lewis, R.S. & Van Lancker, D. (1989) Development and Validation of the Neuropsychology Behavior and Affect Profile.  Psychological Assessment: A Journal of Consulting and Clinical Psychology, 1, 266-272.

Lewis, R.S. (1989) Remembering and the frontal cortex. Psychobiology, 17, 102-107.

Light, R., Neumann, E., Lewis, R. S., Morecki-Oberg, C., Asarnow, R. F., and Satz, P. (1987)  An evaluation of a neuropsychologically based re-education project for the head injured child.   Journal of Head Trauma and Rehabilitation, 2, 11-25.


4) Cerebral Lateralization

Lewis, R. S. & Harris, L. J.  (1990) Handedness, sex and spatial ability.  In S. Coren (Ed.) Left-Handedness:Behavioral implications and anomalies. Elsevier, Holland (pp. 319-341).

Lewis, R. S. and Christiansen, L. (1989) Intrahemispheric sex differences in the functional representation of language and praxic functions in normal individuals.  Brain and Cognition,9, 238-243.

Lewis, R. S., Orsini, D. L., and Satz, P. (1988) Individual  differences in the cerebral organization of language using input and output interference measures of lateralization.  Archives of Clinical Neuropsychology, 3, 111-119.

Lewis, R. S. and Harris, L. J. (1988) The relationship between cerebral hemisphere specialization and cognitive ability:  A critical review, and suggested criteria for a test of the lateralization-cognition hypothesis. Brain and Cognition, 8, 275-290.

Lewis, R. S. and Kamptner, N. L. (1987)  Sex differences in spatial task performance in patients with and without unilateral cerebral lesions.  Brain and Cognition, 6, 142-152.

5) Premedical Education

Mitchell, K., Lewis, R.S., Satterfield, J. & Hong, B. (2016). The new Medical College Admission Test: Implications for teaching psychology. American Psychologist. 71, 125-135.

Lewis, R.S. (2013). And now for something entirely different: The Psychological, Social, and Biological Foundations of Behavior subtest on the MCAT 2015. The Advisor: The Journal of the National Association of Advisors for the Health Professions, 33, 23-27.

Lewis, R.S. (2013). MCAT revision anticipates psychological science. The APS Observer, 26, 37-40.