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request recommendation on hardware device for measuring user response time

Hi all,

I shall be running some experiments under Windows XP Pro. For these experiments, it's critical to measure user response time with high accuracy (ideally to 1 ms). In the past, I used the TDT PI2 hardware timer. Unfortunately, this set of experiments will not be able to use the TDT system. I would like to find out whether there is a stand-alone hardware timer that will do the job. Any advice is greatly appreciated. Thanks.


G. Robert Arrabito, M.Sc.
Defence Scientist | Scientifique de la défense
Advanced Interface Group | Groupe des interfaces avancées
Human Systems Integration | Section de l'intégration humain-systèmes
Defence R&D Canada Toronto | R&D pour la Défense Canada Toronto
1133 Sheppard Ave West , PO Box 2000 | 1133 Ave Sheppard Ouest, C.P. 2000
Toronto, ON M3M 3B9 Canada

Telephone | Téléphone (416) 635-2033
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Government of Canada | Gouvernement du Canada