FB?

Determines what action is triggered for of each FB-classes:

-1 Step Down

1 Step Up

By default, all FB-classes step up, except FB-class 2 which causes the Staircase to step down. This behavior is in line with increasing the value for incorrect trials, and decreasing the value for correct trials.

 Example for using two Staircases

BLOCK B1 2
1 T1 1500 SHR
1 T1 1500 SHR

STAIRCASE SC1 T 3 2 3 10          ; Define 75% Staircase that runs until 10 turns are reached
STAIRCASE SC2 T 3 2 3 10          ; Define 75% Staircase that runs until 10 turns are reached

SESSION S1

INITSCASE SC1 750 250 2000 200           ; Start first staircase with 750
INITSCASE SC2 1500 250 2000 200           ; Start second staircase with 1500

USESCASE SC1 1 1 1 1          ; Assign to 1^st variable argument of 1^st trial specification
USESCASE SC2 1 2 1 2          ; Assign to 1^st variable argument of 2^nd trial specification

RUNBLOCK Exercise 600 0          ; Run block until both staircases have recorded 10 turns