# Unrealistic response durations

**URL:** <https://discourse.psychopy.org/t/unrealistic-response-durations/30298>\
**Category:** Other\
**Created:** [August 5, 2022, 4:33pm UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298 "2022-08-05T16:33:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![GiuliaGenna](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/giuliagenna/32/33719_2.png) [@GiuliaGenna](https://discourse.psychopy.org/u/GiuliaGenna)\
**Post date:** [August 5, 2022, 4:33pm UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298/1 "2022-08-05T16:33:16Z")

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Hello,

For my experiment I need to assess the response durations from consecutive button presses and I usually do that simply with:  
theseKeys = keyboard.getKeys(keyList=list, waitRelease=True)  
and then store each key.duration at each frame.

This solution works on my laptop, it works well with the button box I am using in my behavioral facility but it produces absurd response durations (in the order of 0.5 ms) at the MEG facility I need to run the experiment at (always button box).

I am using the PsychToolbox backend at Psychopy 2022.2.3  
I have no idea on how to even start to troubleshoot this problem.

Do you have suggestions???

Thank you very much in advance

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**Author:** ![TParsons](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/tparsons/32/8301_2.png) [@TParsons](https://discourse.psychopy.org/u/TParsons)\
**Post date:** [August 7, 2022, 3:58pm UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298/2 "2022-08-07T15:58:10Z")

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Is the same version of PsychoPy installed at the MEG facility as on your laptop, and is it the same kind of button box between the two locations?

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**Author:** ![GiuliaGenna](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/giuliagenna/32/33719_2.png) [@GiuliaGenna](https://discourse.psychopy.org/u/GiuliaGenna)\
**Post date:** [August 7, 2022, 9:01pm UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298/3 "2022-08-07T21:01:43Z")

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Psychopy version is the same but the button boxes are not. Those giving this problem are by CURRENT DESIGNS (two different models, same outcome). Any experience with those?

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**Author:** ![TParsons](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/tparsons/32/8301_2.png) [@TParsons](https://discourse.psychopy.org/u/TParsons)\
**Post date:** [August 8, 2022, 8:39am UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298/4 "2022-08-08T08:39:21Z")

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I’m not familiar I’m afraid, but do you have an example of Python code which definitely works with those devices? If you could share that along with the psyexp file / python script you’re using with PsychoPy then it would help give an idea of what the problem is

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**Author:** ![GiuliaGenna](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/giuliagenna/32/33719_2.png) [@GiuliaGenna](https://discourse.psychopy.org/u/GiuliaGenna)\
**Post date:** [August 21, 2022, 12:39am UTC](https://discourse.psychopy.org/t/unrealistic-response-durations/30298/5 "2022-08-21T00:39:26Z")

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I could solve this issue by installing a new firmware, provided by the company itself after explaining the experimental needs of our lab.  
If someone runs into a similar problem I can say that the support team of CURRENT DESIGN is helpful and responsive.

@TParsons thank you so much for your willingness to help 🙂