Fig. 7.

Same-trial RDM similarity is mostly driven by effects unrelated to the stimuli. A) GWP model and same-trial RDM comparisons. The red bars show the mean Kendall's tau-a rank-correlation between single-trial V1-RDM and the GWP model. The dark gray bars show the mean rank-correlation between the single-trial V1 RDM and the single-trial V2 RDM constructed from the same trials. The light gray bars show the mean rank-correlation between the V1 RDMs of different subjects constructed from trials with same temporal structure. The black line shows results on V1 RDM replicability, that is, the correlation between V1 RDMs constructed from separate trials and thus the stimulus-driven effects. The results are shown separately for each subject (in different rows) and the error-bars indicate SEMs across the 25 experimental runs. B) Separate-trial RDM comparisons. The red bars (GWP model comparison) and black lines (V1 RDM replicability results) are the same as in (A), note the different y-axis. The dark gray bars show the mean rank-correlation between the V1 and V2 RDMs constructed from separate trials. The light gray bars show the mean rank-correlation between V1 RDMs of different subjects constructed from trials with different temporal sequence. C) Effects of mean-response and temporal distance on RDMs. The blue bars show the mean rank-correlation between the V1-RDM and mean-response RDM. In this simple model of the coherent response-pattern-fluctuations, each cell in the RDM contains the absolute difference between the response-pattern-means divided by the sum of the absolute values of the response-pattern-means between a pair of stimuli. The green bars show the mean rank-correlation between the V1-RDM and the temporal distance RDM, in which each cell contains the temporal distance between the presentations of a pair of stimuli. The black lines (V1 RDM replicability results) are the same as in (A–B), note the different y-axis.