A 35 mm slide tachistoscope projector was used to present 26 subjects with both symbol and word traffic signs, 1 at a time for an exposure duration of either 1/3- or 1/18-second. Each presentation was followed by either a 5-second delay period, a 10-second delay period, or a 10-second interference period, after which the subject was asked to match the test sign to an identical sign, which was 1 of 10 shown on a following slide. The accuracy of the match was recorded. During the 10-second interference period, the subject was required to perform a simple reading task. Ten subjects were tested at the 1/3-second viewing time and 16 at the 1/18-second viewing time. All subjects, both drivers and nondrivers, were familiar with the word signing system, but only 1 had been previously exposed to the symbol system. The results of this study show that, under these laboratory test conditions, symbol signs are more accurately recognized at the 1/18-second viewing time than are word signs.

  • Availability:
  • Corporate Authors:

    National Safety Council

    425 North Michigan Avenue
    Chicago, IL  United States  60611
  • Authors:
    • King, L E
  • Publication Date: 1975-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00098806
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: DL 70-001(001-003)
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM