STAIRCASE

To run an up/down staircase process you must define a staircase. The staircase definition specifies the basic characteristics of the staircase which influence how the staircase converges to a threshold.

On the session level, a staircase must be initialized with actual start values and value range and assigned to a variable argument or the entire block.

There are two different ways to define a staircase process:

T Choose predefined target threshold

A Define individual parameters of the staircase process

 STAIRCASE Name T
Target [CutHalf [StartOnTurn [nTurns]]]

Defaults:

StepRatio 1.0 (same step size for up and down)

CutHalf 0 (do not divide step size)

StartOnTurn 1 (Start estimating threshold at first turn)

nTurns 0 (no end condition)

 STAIRCASE Name A
N_error N_corr StepRatio [CutHalf [StartOnTurn [nTurns]]]