A Toolbox for Representational Similarity Analysis
Figure 5
Human IT (real data) – inferential comparisons of multiple model representations.
Like Fig. 4, this figure demonstrates inferential analyses supported by the toolbox. Here, however, inference is performed on real data from fMRI. The smaller number of subjects (4) precludes the use of second-level inference with subject as a random effect. Relatedness to the reference RDM is therefore tested using stimulus-label randomization and the pairwise performance comparisons among the candidate RDMs (along with the error bars) are based on bootstrap resampling of the stimulus set. The models are the same as in Fig. 4 and reproduced here for convenience (except for the “true model”, which is unknown for the real data). The comment bubbles detail the key changes in comparison to the analysis of Fig. 4, illustrating an alternative scenario for RSA statistical inference.