A convenient and accurate parallel Input/Output USB device for E-Prime

Rosario Canto, Ilaria Bufalari, Alessandro D'Ausilio

Research output: Contribution to journalArticlepeer-review


Psychological and neurophysiological experiments require the accurate control of timing and synchrony for Input/Output signals. For instance, a typical Event-Related Potential (ERP) study requires an extremely accurate synchronization of stimulus delivery with recordings. This is typically done via computer software such as E-Prime, and fast communications are typically assured by the Parallel Port (PP). However, the PP is an old and disappearing technology that, for example, is no longer available on portable computers. Here we propose a convenient USB device enabling parallel I/O capabilities. We tested this device against the PP on both a desktop and a laptop machine in different stress tests. Our data demonstrate the accuracy of our system, which suggests that it may be a good substitute for the PP with E-Prime.

Original languageEnglish
Pages (from-to)292-296
Number of pages5
JournalBehavior Research Methods
Issue number1
Publication statusPublished - Mar 2011


  • E-Prime
  • Low-cost I/O device
  • Timing accuracy

ASJC Scopus subject areas

  • Psychology(all)
  • Psychology (miscellaneous)
  • Experimental and Cognitive Psychology


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