# Wrong RT recorded?

**URL:** <https://discourse.psychopy.org/t/wrong-rt-recorded/40453>\
**Category:** Builder\
**Tags:** slider\
**Created:** [June 17, 2024, 6:28pm UTC](https://discourse.psychopy.org/t/wrong-rt-recorded/40453 "2024-06-17T18:28:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Ange](https://avatars.discourse-cdn.com/v4/letter/a/76d3ee/32.png) [@Ange](https://discourse.psychopy.org/u/Ange)\
**Post date:** [June 17, 2024, 6:28pm UTC](https://discourse.psychopy.org/t/wrong-rt-recorded/40453/1 "2024-06-17T18:28:37Z")

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Hi,  
I’m in windows 10, use the builder.

First, the experiment starts with some simple questions:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/3/5/35af068483dfba1ace1bf681d864c2833973dab0.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/a/c/ac39d54c36a44fe1154663e3eeba1dce75256d95.png)

Here is the output of two of these questions: In the first trial starting in column AJ, we see a very high key\_resp.rt (column AM) while for the second it is super slow (column AT). I def did not press the button very quickly on the second question. How come?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/a/1/a184b37e55d5afc2cbbd74ba18fb69d3eec081fe.png)

Here is the link to the csv file: [data - Google Drive](https://drive.google.com/drive/folders/1VaiEcYjE6-TQawF2d2CdDGVKhGF0N5s6?usp=drive_link)

Below, the slider.rt (column BI) is very low and negative. I probably should ignore this column and rather look at column BM to get the RT?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/b/f/bf0ca2937e98f4b38c2e9181e9b2ad8a6fde5f0e.png)

For information, I use the slider with a mouse response.  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/4/4/444c3ffa34ae93ae7dcfc73aeffebcb3f2d5a430.png)  
In the ‘Begin Routine’ I define that there are no ticks (somehow I think that the problem might be linked to this) and that the labels are changing based on the question (randomized presentation).  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/a/1/a1a781cdb7c682072c3b3eadc79397001f8af100.png)

Thank you very much!

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<div class="post-metadata">

**Author:** ![Ange](https://avatars.discourse-cdn.com/v4/letter/a/76d3ee/32.png) [@Ange](https://discourse.psychopy.org/u/Ange)\
**Post date:** [June 25, 2024, 8:56am UTC](https://discourse.psychopy.org/t/wrong-rt-recorded/40453/2 "2024-06-25T08:56:05Z")

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Nobody knows? Anyone met the problem before that the RT are so low (column AT and BI)?  
Is the question well enough written or should I try to improve the post?

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**Author:** ![JensBoelte](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/jensboelte/32/9060_2.png) [@JensBoelte](https://discourse.psychopy.org/u/JensBoelte)\
**Post date:** [June 26, 2024, 9:40am UTC](https://discourse.psychopy.org/t/wrong-rt-recorded/40453/3 "2024-06-26T09:40:59Z")

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Hello

Which PsychoPy-version are you using? There was a bug in some PsychoPy-versions, see [here](https://discourse.psychopy.org/t/rt-not-measured-from-start-of-keyboard-component/39562).

Best wishes Jens

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<div class="post-metadata">

**Author:** ![Ange](https://avatars.discourse-cdn.com/v4/letter/a/76d3ee/32.png) [@Ange](https://discourse.psychopy.org/u/Ange)\
**Post date:** [July 1, 2024, 11:10am UTC](https://discourse.psychopy.org/t/wrong-rt-recorded/40453/4 "2024-07-01T11:10:04Z")

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ok, I found the error. It is not a problem with saving correct RTs but with a comma separation of the input stimulus file. the problem is discussed here but no solution found: [Online experiment saved data was format misplacement - #17 by Stuart\_Furnell](https://discourse.psychopy.org/t/online-experiment-saved-data-was-format-misplacement/5986/17)