Table 1 Errors in performance for various possible interactions between stimulus and context.
Error/Task | fg | f + g | [f + g - 1]+ | sig (f + g) |
|
|---|---|---|---|---|---|
(σ CM /Scaling (DE) | 0.60 | 6.3 | 0.50 | 0.62 | 0.66 |
(σ CM /Scaling (CE) | 0.60 | 5.5 | 0.51 | 0.61 | 0.69 |
Bias/Orientation | 0.03° | 36° | 0.05° | 0.04° | 0.06° |
DT/Orientation | 1.39° | 37° | 1.09° | 1.44° | 1.88° |
- Functions f and g are the sensory- and context-dependent terms used to generate the GM responses; fg is the standard condition in which these functions are multiplied (Equation 1). Other combinations: f + g, linear interaction (Equation 15); [f + g - 1]+, rectification (Equation 16); sig(f + g), sigmoidal function (Equation 17); and
, power function (Equation 18). Network parameters were as in Figs. 6 and 9a-f, for the corresponding tasks. For each row, all numbers were generated using exactly the same model parameters, except for the specific combination of f and g terms. DE, discontinuous encoding; CE, continuous encoding; DT, discrimination threshold.