August 2016
Volume 16, Issue 12
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2016
About measuring reaction times
Author Affiliations
  • Eli Brenner
    Department of Human Movement Sciences, Vrije Universiteit
  • Jeroen Smeets
    Department of Human Movement Sciences, Vrije Universiteit
Journal of Vision September 2016, Vol.16, 977. doi:10.1167/16.12.977
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Eli Brenner, Jeroen Smeets; About measuring reaction times. Journal of Vision 2016;16(12):977. doi: 10.1167/16.12.977.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

One way to estimate how long it takes to process visual information is by measuring reaction times. How much longer it takes to respond to a certain aspect of a visual stimulus than to respond to a similar stimulus when the aspect in question does not need to be processed can give you an indication of how long it takes to do the processing. Reaction times are easily measured by asking people to press or release a button. However, responses can differ in vigor as well as in latency. We suspected that the latencies of less vigorous responses might be overestimated when relying on buttons to determine the reaction time. To examine whether this is true, participants were asked to lift their finger off a button as soon as they heard a tone. We compared two conditions. In one condition there was a straw balancing across two blocks just above the button. Participants were told not to knock the straw off the blocks. In the other condition there was no straw. Otherwise the conditions were identical. When we used the moment at which the finger released the button as the reaction time, we found that the reaction time was significantly longer in the presence of the straw. Since our button was actually a force sensor, we could also determine the moment at which the force started to change. When reaction time was measured in this manner, the straw did not influence the judged latency. Thus, the way in which the reaction time is measured can influence the conclusion that we draw from the data. As properties of a stimulus can influence the magnitude of the response as well as its latency, it is important to be aware that the magnitude of the response might influence the estimated latency.

Meeting abstract presented at VSS 2016

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×