| Reaction Time (RTI) is a latency task with a comparative history (the five choice task) and uses a procedure to separate response latency from movement time. It is more useful than CRT or SRT where it is necessary to control for tremor. |
Administration time
Around 5 minutes, depending on level of impairment.
Task
The task is divided into five stages, which require increasingly complex chains of responses. In each case, the subject must react as soon as a yellow dot appears. In some stages the dot may appear in one of five locations, and the subject must sometimes respond by using the press-pad, sometimes by touching the screen, and sometimes both.
Test modes
Clinical mode, parallel mode and child mode
Outcome measures
The four outcome measures in RTI are divided into reaction time (simple and 5-choice) and movement time (simple and five-choice).
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