MEASURING PRECISION AND ACCURACY

Method of Limits

Method of Constant Stimuli

Method of Adjustment

PRECISION OR ACCURACY

Precision & Weber's Law

(In)accuracy & M-L Illusion

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OPERATING INSTRUCTIONS

1. The line flanked by arrows or vertical lines is a standard stimulus of fixed length.
2. The line without arrows or vertical lines is the comparison stimulus of adjustable length.
3. Click the 'left arrow' button to make the comparison line shorter.
4. Click the 'right arrow' button to make the comparison line longer.
5. Click the 'Next Trial' button to advance to the next trial.
6. At any time, you may stop the trials by clicking the menu button.

 You will now have 6 practice trials