Figure A1.

Perception at stimulus appearance depends on the values of traces A_i and A_j. (A) General layout of the ‘percept choice landscape’. At moderate levels of traces A_i and A_j the population with the highest A value gains dominance (white region). This may be called a facilitatory effect of A. It is responsible for percept repetition. At higher levels of traces A_i and A_j the population with the lowest A value gains dominance (gray region). Thus, here A has a suppressive effect, which causes percept alternation. (B) Long blank durations lead to percept repetition. (C) Short blank durations cause perception to alternate on consecutive presentations.