Action

A trial command that will be executed when the condition matches the result of the expression You can use ‘+’ or ‘&’ screen operators as a prefix to trial commands to influence screen presentation.

 Examples for response-dependent feedback using the OE-command

PICTURE Far
Try to click closer to the center

PICTURE Near
Good job !

; Expression to compute distance from mouse click to center of screen location

VARIABLE Distance

EXPRESSION CheckDist

ifelse(get_rsp('dist') > 5, 'far', 'near')

; Trial definition for displaying the stimulus

TRIAL T1

TL Circle KeyTbl 10 0

SP Fix Center 1 500

RK Press

+SP Target Circle ? 0 1

OE CheckDist

far: SP Far Center(1) 1000

near: SP Near Center(1) 1000