Dynamometer

[Michiel Spape]

Hiya,
To add another experience, I've used the Jamar+ digital dynamometer here to test grip force, but I cannot be integrated into e-prime or such (other than typing in its output). Such devices are also of more use to measure 'maximum grip force', and, should you ever do this, I would recommend testing multiple trials a long time in between (I mean minutes). Participants here usually scored 40 kg (what, 6-7 stones or something, for the imperialists here) at first trial and 20 at the 3rd in a row. Not very reliable.
For ease of programming and more natural experiments with e-prime and such, I'd recommend force joysticks. We had a discussion about some of these on this list, I seem to recall. All in all, it depends on whether you're planning to publish in a psychophysics journal - which would require something along David's suggestion or very good medical equipment - or psychological-neuropsychological - for which often just any force-feedback joystick would suffice.
Best,
Mich

Dr. Michiel M. Sovijärvi-Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology
www.cognitology.eu


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of David McFarlane
Sent: 21 October 2011 16:38
To: e-prime at googlegroups.com
Subject: Re: Dynamometer

Ben,

Don't know about a dynomometer, but FWIW, just a few days ago I 
learned about some availabe small "flexible force sensors" 
(<http://www.tekscan.com/flexible-force-sensors>http://www.tekscan.com/flexible-force-sensors 
).  You would of course also have to add an A/D converter (e.g., 
http://www.mccdaq.com/usb-data-acquisition/USB-1208-Series.aspx ), 
and then integrate the A/D software with E-Prime (not for the faint 
of heart, but eminently possible, as I know from some experience).

-- David McFarlane, Professional Faultfinder


At 10/21/2011 05:33 AM Friday, you wrote:
>We want to measure the force a subject applies to press a button or
>move a joystick. Has anybody used a dynamometer and can recommend a
>device?
>
>Regards,
>Ben

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