Research Overview

Research Questions

• How are neural representations structured, and how do they underlie behaviour?
• Individual differences in behavioural performance.
• Social and environmental effects on learning.

Methods

• Multivoxel pattern-based fMRI analysis (MVPA).
• Computational modeling.
• Psychophysics.
• EEG brain-computer interface (BCI).

Selected Publications

• Anderson, A. J, Binder, J, Fernandino, L., Humphries, C., Conant, L., Aguilar, M., Wang, X., Doko, D. and Raizada, R.D.S. (2016) Predicting neural activity patterns associated with sentences using a neurobiologically motivated model of semantic representation. Cerebral Cortex, Advance Online Publication. DOI: 10.1093/cercor/bhw240. PDF. 
• Zinszer, B.D., Anderson, A.J., Kang, O., Wheatley, T. and Raizada, R.D.S. (2016) Semantic structural alignment of neural representational spaces enables translation between English and Chinese words. Journal of Cognitive Neuroscience, Advance Online Publication. DOI: 10.1162/jocn_a_01000. PDF. 
• Shahbazi, R., Raizada, R.D.S. and Edelman, S. (2016) Similarity, kernels, and the fundamental constraints on cognition. Journal of Mathematical Psychology, 70, 21-34. PDF.
• Anderson, A.J., Zinszer, B. and Raizada, R.D.S. (2016) Representational similarity encoding for fMRI: Pattern-based synthesis to predict brain activity using stimulus-model-similarities. NeuroImage, 128, 44-53. PDF. 
• Raizada, R.D.S. and Lee, Y.S. (2013) Smoothness without smoothing: why Gaussian Naive Bayes is not naive for multi-subject searchlight studies. PLoS ONE, PLoS ONE 8(7): e69566. doi:10.1371/journal.pone.0069566 PDF.
• Mackey, A.P., Raizada, R.D.S. and Bunge, S.A. (2012) Environmental influences on prefrontal development. In: Principles of frontal lobe function (2nd Edition), edited by Donald Stuss and Robert Knight. Oxford: Oxford University Press. PDF.
• Lee, Y.S., Turkeltaub, P., Granger, R.H. and Raizada, R.D.S. (2012) Categorical speech processing in Broca's area: An fMRI study using multivariate pattern-based analysis. Journal of Neuroscience, 32(11), 3942-3948. PDF.
• Raizada, R.D.S. & Connolly, A.C. (2012) What makes different people's representations alike: neural similarity-space solves the problem of across-subject fMRI decoding. Journal of Cognitive Neuroscience, 24(4), 868-877. PDF. Matlab and Python analysis code.Webpage describing code. Supp.Info.
• Raizada, R.D.S. and Kriegeskorte, N. (2010) Pattern-information fMRI: new questions which it opens up, and challenges which face it. International Journal of Imaging Systems and Technology, 20(1), 31-41. Special issue on recent developments in neuroimaging, guest edited by Dae-Shik Kim. PDF.
• Raizada, R.D.S., Tsao, F.M., Liu, H.M., Holloway, I.D., Ansari, D. and Kuhl, P.K. (2010) Linking brain-wide multivoxel activation patterns to behaviour: examples from language and math. NeuroImage, 51, 462-471. PDF. Supplementary Material.
• Raizada, R.D.S. and Kishiyama, M. (2010) Effects of socioeconomic status on brain development, and how Cognitive Neuroscience may contribute to leveling the playing field. Frontiers in Human Neuroscience. doi:10.3389/neuro.09.003.2010. PDF.
• Raizada, R.D.S., Tsao, F.M., Liu, H.M. and Kuhl, P.K. (2009) Quantifying the adequacy of neural representations for a cross-language phonetic discrimination task: prediction of individual differences. Cerebral Cortex, 20(1), 1-12. Advance Online Publication: April 22, 2009. PDF. Supplementary material.
• Raizada, R.D.S., Richards, T.L., Meltzoff, A.N. and Kuhl, P.K. (2008) Socioeconomic status predicts hemispheric specialisation of the left inferior frontal gyrus in young children. NeuroImage, 40(3), 1392-401. PDF. Supplementary Material.
• Raizada, R.D.S. and Poldrack, R.A. (2007) Challenge-driven attention: interacting frontal and brainstem systems. Frontiers in Human Neuroscience, 1, 3. PDF.
• Raizada, R.D.S. and Poldrack, R.A. (2007) Selective amplification of stimulus differences during categorical processing of speech. Neuron, 56(4), 726-40. PDF. Supplemental Material.
• Raizada, R.D.S. and Grossberg, S. (2003). Towards a theory of the laminar architecture of cerebral cortex: computational clues from the visual system. Cerebral Cortex, 13(1), 100-13. PDF.
• Grossberg, S. and Raizada, R.D.S. (2000). Contrast-sensitive perceptual grouping and object-based attention in the laminar circuits of primary visual cortex. Vision Research, 40, 1413-1432. PDF.
• Raizada, R.D.S. (2000). "A fruitful blend, or a trinket-box? A book review of The MIT Encyclopedia of the Cognitive Sciences." Neural Networks, 13(3), 397-398. PDF.