Figure 5.

A model architecture fitting all of the data. The model contains three elements: (i) PRP, (ii) MPP, and (iii) SMP. PRP and MPP form the third-order motion computation pathway; SMP is the second-order motion computation pathway. Sensory information is sent to both computation pathways and processed independently. The output of each pathway is multiplied by normalized weight, q and (1 − q), which bias the direction of perceived motion. The weights q and (1 − q) are different for different observers and are assumed to be a function of selective attention.