Behavior Research Methods

, Volume 41, Issue 1, pp 1–12 | Cite as

Timing accuracy of Web experiments: A case study using the WebExp software package

  • Frank Keller
  • Subahshini Gunasekharan
  • Neil Mayo
  • Martin Corley


Although Internet-based experiments are gaining in popularity, most studies rely on directly evaluating participants’ responses rather than response times. In the present article, we present two experiments that demonstrate the feasibility of collecting response latency data over the World-Wide Web using WebExp—a software package designed to run psychological experiments over the Internet. Experiment 1 uses WebExp to collect measurements for known time intervals (generated using keyboard repetition). The resulting measurements are found to be accurate across platforms and load conditions. In Experiment 2, we use WebExp to replicate a lab-based self-paced reading study from the psycholinguistic literature. The data of the Web-based replication correlate significantly with those of the original study and show the same main effects and interactions. We conclude that WebExp can be used to obtain reliable response time data, at least for the self-paced reading paradigm.


Original Study Behavior Research Method Noun Phrase Reading Time Timing Filter 
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Copyright information

© Psychonomic Society, Inc. 2009

Authors and Affiliations

  • Frank Keller
    • 1
  • Subahshini Gunasekharan
    • 1
  • Neil Mayo
    • 1
  • Martin Corley
    • 1
  1. 1.School of InformaticsUniversity of EdinburghEdinburghScotland

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