Syaheed Jabar

I am generally interested in the interplay between visual perception and 'attention', and how they are instantiated in the brain. Of particular interest is how acquired experience, or stimulus probability, can change an object's or feature's perceptual representation. I explore this relation through a combination of behavioural methods, electrophysiological recordings, and computational models. By pointing to specific neural mechanisms, my hope is that unclear terminologies like 'attention', and the confusion that comes with it, can be avoided.

Relatedly, I am also keen on artificial intelligence research. While deep learning is promising, implementations of it typically require an abundance of data for training. Of particular interest to me is how biologically realistic on-line learning can be computationally instantiated using what we know about the mechanisms of the brain.

I am currently finishing up my PhD, and am interested in a post-doctoral position.

Research Papers

Jabar, S. B., Filipowicz, A. and Anderson, B. (2017). Knowing where is different from knowing what. Distinct response time profiles and accuracy effects for target location, orientation, and color probability. Attention, Perception, & Psychophysics. https://doi.org/10.3758/s13414-017-1412-8

Jabar, S. B., Filipowicz, A. and Anderson, B. (2017). Tuned by Experience: How Orientation Probability Modulates Early Perceptual Processing. Vision Research,138, 86-96. https://doi.org/10.1016/j.visres.2017.07.008

Jabar, S. B., and Anderson, B. (2017) Not all probabilities are equivalent: Evidence from orientation versus spatial probability learning. Journal of Experimental Psychology: Human Perception and Performance, 42, 853-867. http://dx.doi.org/10.1037/xhp0000354

Jabar, S. B., & Anderson, B. (2017). Orientation probability and spatial exogenous cuing improve perceptual precision and response speed by different mechanisms. Frontiers in Psychology, 8:183. https://doi.org/10.3389/fpsyg.2017.00183

Jabar, S. B., & Anderson, B. (2015). Probability shapes perceptual precision: A study in orientation estimation. Journal of Experimental Psychology: Human Perception and Performance, 41, 1666-1679. https://doi.org/10.1037/xhp0000121

Hon, N., Yap, M. J., & Jabar, S. B. (2013). The trajectory of the target probability effect. Attention, Perception, & Psychophysics, 75(4), 661-666. https://link.springer.com/article/10.3758/s13414-013-0429-x

Conferences

Jabar, S. B., Filipowicz, A. and Anderson, B. Knowing Where Is Different From Knowing What. Distinct Response Time Profiles and Accuracy Effects for Target Location, Orientation, and Color Probability. Poster at ECVP;2017 Click here.

Jabar, S. B., Filipowicz, A, and Anderson, B. Orienting to probable stimuli affects early perception: Modulating the ‘C1’ visual evoked potential in an orientation estimation task. Poster at: SFN;2016 Full Poster - Supplementary Material.

Jabar, S. B., and Anderson, B. Spatial probability improves detection, orientation probability improves precision: Modelling as neural gain versus tuning. Poster at: VSS;2016 [Full Poster][(/assets/conferences/sj_vss2016_final.pdf) - I also have an online version of the model here.

Jabar, S. B., and Anderson, Britt. Influence of Spatial versus Orientation Probability on Perceptual Estimations. Poster at: Canadian Society for Brain and Behavioral Sciences; 2015. Annotated handout.

Jabar, S. B., and Anderson, Britt. Modelling Probability Effects as Differences in Neuron Tuning. Poster at: Canadian Society for Brain and Behavioral Sciences; 2014. Annotated handout.

Jabar, S. B., and Anderson, Britt. Probability cues enhance perceptual estimations. Poster at: Vision Sciences Society; 2014. Annotated handout.

Hon, N, & Jabar, S. B. Learning about rare targets: 54th Annual Meeting of The Psychonomic Society, November 15th 2013, Toronto, ON.

Email: syaheed.jabar@uwaterloo.ca