How to measure the response time from the keyboard?

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Hello,

I have a winform system showing photos, the system measure the elapsed time between showing the photo until the user pressed any key button on the keyboard with a stopwatch.

I saved the time in a

C#

Dictionary<image, long>

in such a way that for each photo i have the response time(saved in miliseconds) from the user.

How do i verify that the times that the user pressed is the real times saved in the dictionary?

Is there any tool in VS2012 or other, to help me Verify it?

Thanks.

Posted 17-Apr-13 21:58pm

RoyDoron

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Kenneth Haugland 18-Apr-13 4:00am

Depends on how accurqate you need the timer to be. If you want millisecound accuracy I think youll have to resolve the issue with external hardware.

RoyDoron 18-Apr-13 4:02am

I just want to know if the times saved are in the normal interval..
I'm taking under consideration other apps on the cpu.

I dont want to use external hardware, just vs tools or other programs.. is there any?

2 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-05-25T13:19:00

Solution 1

Most accurate method to time interval between event using the same computer is the class System.Diagnostics.Stopwatch:
http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx[^].

Pay attention for the static fields IsHighResolution and Frequency, to see what resolution do you really have. Normally, on a Windows platform, it is very good.

—SA

Posted 25-May-13 13:19pm

Sergey Alexandrovich Kryukov

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Espen Harlinn 25-May-13 20:25pm

5'ed!

Sergey Alexandrovich Kryukov 25-May-13 20:39pm

Thank you, Espen.
—SA

Espen Harlinn · Answer 2 · 2013-05-25T14:24:00

Solution 2

It takes about 20 ms before the brain can start processing the picture, and then it has to make a desicion, before telling the hand to press a key.

Unless your program tries to quantify Nerve conduction velocity[^] - a regular PC should do well enough under a normal load.

Best regards
Espen Harlinn

Posted 25-May-13 14:24pm

Espen Harlinn

Comments

Sergey Alexandrovich Kryukov 11-Jun-13 19:47pm

Great point, a 5.
—SA

Espen Harlinn 12-Jun-13 15:45pm

Thank you, Sergey :-D

How to measure the response time from the keyboard?

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How to measure the response time from the keyboard?

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