[Probcogsci] CANCELLED : Re: next kutas lab meeting

[Vicente Malave]

Hello all. This meeting has been cancelled. Thank you,
-- 
Vicente Malave

On Fri, Nov 13, 2009 at 2:25 PM, Marta Kutas <mkutas at ucsd.edu> wrote:

>
> Monday, Nov 16, 3:30, CSB 280
>
> Vicente Malave
>
> Classification Caveats : Practical limits of Multi-Voxel Pattern Analysis
> in fMRI.
>
> Multivariate pattern classification techniques are attracting increasing
> attention as an alternative data analysis technique in cognitive
> neuroscience. The purpose of this talk is to provide a critical look at two
> inferences using these methods. The first inference is simply that two
> conditions of the experiment are different. We discuss the connection
> between pattern classification methods and classical multivariate hypothesis
> testing. We briefly discuss resampling-based statistics, statistical power,
> and the impact on experimental design. The second inference is in
> interpretation of the model learned by a linear classifier. In particular,
> many studies compute "importance maps" that purport to show where
> discriminating information between the two conditions is located in the
> brain. We provide a critical look at this inference by noting that many very
> different models can achieve similar classification accuracy, and many very
> similar models can perform at chance. We show some techniques for exploring
> the space of possible models, discuss proposed solutions from the
> literature, and urge caution when making inferences about the importance of
> particular feature in classification.
>
>
> all welcome
>
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