Collection of reaction times - question

Comments

• sebastiaan

  December 2017

  Hi,

  Will this set-up produce reliable collections of the reaction time to my target sketchpad (and only my target sketchpad)?

  Yes!

  During the process, OpenSesame recorded a variable that was called "response_time_Target" which I understood was the response_time to my target sketchpad. Now this variable is gone and I am left with the "response_time" variable. Am I still recording the reaction time to the target slide or something else? (like maybe the general response time to a whole trial or sth...)

  The response_time variable is the last response time collected by any item. The response_time_keyboard_response is the last response time collected by the item called keyboard_response, etc. Does that make sense?

  Can I set the duration of this sketchpad to 0 also and append a keyboard_response item behind it without screwing up my logfile or mixing up the recorded reaction times?

  Yes, because the _[item name] disambiguates the different items.

  Cheers!
  Sebastiaan

  
  
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• brt123

  January 2018 edited January 2018

  Thanks for your answer, Sebastiaan!

  The response_time variable is the last response time collected by any item. The response_time_keyboard_response is the last response time collected by the item called keyboard_response, etc. Does that make sense?

  So in my case that means that the variable "response_time_keyboard_response" basically collects the same reaction time as the "response_time_Target"? Or, in other words, is the "response_time_keyboard_response" wrong, yet reliable so that I can still report it and use it for my analyses (I suppose that the variance of the values doesn't change from Target - response to keyboard - response...). By the way I programmed the experiment for some science course in University and it's rather about a proof - of - principle than real hypothesis testing, so that wouldn't be a problem.
  Background of my question is that I have two versions of the Experiment running (one for left - handed and one for right - handed participants, so to say) and now found out that I can't find the "response_time_Target" variable in one of the versions. The "response_time_keyboard_response" variable is present in both datasets so I could analyze that, if it validly measures the reaction time to the target slide...

  Cheers!
• eduard

  January 2018

  Hi,

  To chime in a little, the easiest way to find out, is to compare the values of the two variables for the experiment for which both are present. If they are the same, you're good, I guess.

  Eduard