Sam Hannah's Home

My interests lie in the intersection of high-level cognitive processes with more basic cognitive and perceptual processes.

With Lee Brooks, I have explored the questions, "How much of concept use is tied to the surface appearance of things, and how much reflects the use of more abstract feature representations?" and "How do the use of these representations relate to different decision-making processes?"

With Lorraine Allan, Shep Siegal and Matt Crump, I have been exploring the questions, "How much can Pavlovian conditioning explain judgments of control or judgments of contingency?", and "Can feelings states be used to heuristically guide such reasoning?"

Currently, I am at Queen's, working with Doug Mewhort on exploring the questions "How can information theory tell us about concept use?" and "What can simple models of episodic memory tell us about how a sensitivity to surface features emerges in concept use?"

And on my own I have explored the question, "Who, or what, is Jacob, and did Locke really kill him?"

Sam Hannah (Ph.D.), research fellow (Queen's University).
		My interests lie in the intersection of high-level cognitive processes with more basic cognitive and perceptual processes. With Lee Brooks, I have explored the questions, "How much of concept use is tied to the surface appearance of things, and how much reflects the use of more abstract feature representations?" and "How do the use of these representations relate to different decision-making processes?" With Lorraine Allan, Shep Siegal and Matt Crump, I have been exploring the questions, "How much can Pavlovian conditioning explain judgments of control or judgments of contingency?", and "Can feelings states be used to heuristically guide such reasoning?" Currently, I am at Queen's, working with Doug Mewhort on exploring the questions "How can information theory tell us about concept use?" and "What can simple models of episodic memory tell us about how a sensitivity to surface features emerges in concept use?" And on my own I have explored the question, "Who, or what, is Jacob, and did Locke really kill him?"	Several Quicktime examples of the streamed-trial procedures we have developed in our lab. These include the single-cue trials used in Crump et al., and Allan et al. (2008), as well as several implementations of one-phase blocking and two-phase blocking tasks.
Some papers	Hannah, S.D., Crump, M.J.C., Allan, L.G., & Siegel, S. (2009). Cue-interaction effects in contingency judgments using the streamed-trial procedure.. Canadian Journal of Experimental Psychology, 63, 103-112. Allan, L.G., Hannah, S.D., Crump, M.J.C., & Siegel, S. (2008). The psychophysics of contingency assessment. Journal of Experimental Psychology: General, 137, 226-243. Crump, M. J. C, Hannah, S. D., Allan, L. G. A., Hord, L. K. (2007). Contingency judgments on the fly. Quarterly Journal of Experimental Psychology,60, 753-761 Hannah, S. D., Allan, L. G., & Siegel, S. (2007). The consquences of surrendering a degree of freedom to the participant in a contingency assessment task. Behavioral Processes, 74, 265-273. Allan, L. G., Siegal, S. & Hannah, (2007). The sad truth about depressive realism. Quarterly Journal of Experimental Psychology, 60, 482-495.	Hannah, S.D., and Brooks, L. R. (in press). Featuring familiarity: How a familiar feature influences categorization. Canadian Journal of Experimental Psychology. Hannah, S.D., and Brooks, L. R. (2006). Producing diagnostic biasing with unambiguous stimuli: The role of instantiated features. Journal of Experimental Psychology: Learning, Memory & Cognition, 32, 1416-1423. Brooks, L. R., and Hannah, S. D. (2006). Instantiated features and the use of "rules". Journal of Experimental Psychology: General, 135, 133-151. Hannah, S. D. (2005). Feature representations and analytic/nonanalytic processing. Canadian Journal of Experimental Psychology, 59, 41-46.	An example of lepton stimuli with overlap (2-away training items, from Hannah, Jamieson & Brooks,in preparation)