Table 1.

Stimulus protocols

Stimulus type protocolSpatial arrangementSurface areaCircumferenceDensity
StandardRandomizedIncreasing with quantityIncreasing with quantityIncreasing with quantity
Equal area and equal densityRandomizedEqual across quantityIncreasing with quantityEqual across quantity
Equal circumferenceRandomizedDecreasing with quantityEqual across quantityIncreasing with quantity
LinearOne-dimensional, linearIncreasing with quantityIncreasing with quantityIncreasing with quantity
  • Three dots tend to be arranged as triangle, four dots as quadrangle, five dots as pentagon.

  • Density determined by calculating the average distance between all dots in a given display.