Fig 5. Abstract structure of the combinations.

M1 –Model 1; M2 –Model 2; M3 –Model 3; M4 –Model 4; M5 –Model 5. The abstract structure of the combinations were defined the following way: the final trial of a combination was always denoted as a; the preceding trial as either a (if it was the same as the final trial) or b (in all other cases). If the N-2^th trial was identical to the N^th or N-1^th trial, the same notation was used as before (e.g. a or b), in all other cases a new notation was introduced (eg. c), etc. Bars indicate the mean number of category members in an epoch (~400 trials) calculated for each epoch of each participant. The black boxes at the top of the bars indicate the 95% confidence intervals of these means. The relative proportion of categories colored rose is identical in the Model’s subcategories. Dark blue boxes indicate the 95% confidence intervals of means of median RT values corresponding to the different categories (again, computed separately for each epoch of each participant). Red and purple arrows point to categories that are analyzed with Triplet Filter and Quad Filter, respectively.