The chapters of this thesis consist of six articles which can be read separately but are in fact closely connected. The first three have already been published. Chapter I shows relationships between the results of measurements of flicker thresholds of harmonically modulated light and detection thresholds of rectangular incremental flashes. In chapter II a model is proposed which gives a theoretical framework to these relationships. Chapter III contains the results of experiments with pairs of short identical flashes as a means of testing the model. Thresholds of intensity increments and decrements are compared in Chapter IV. Thresholds of pairs consisting of an increment and a decrement are also studied. Finally, supplementary experiments with incremental flashes having very long durations are discussed in this chapter. The last two experiments give rise to a refinement of the model suggested in Chapter II. In Chapter V a comparison is made of three methods of studying perceptual delay. Results of this type of measurement are compared with theoretical values calculated from the flicker fusion curves with the aid of the model. Chapter VI, finally, is devoted to stochastic aspects as these manifest themselves in threshold measurements, and to the impact they have on the results of the previous chapters (a). Chapters 1-3 of the thesis are published in Vision Research, 1972, 12, 261-278; 1972, 12, 279-292; and 1973, 13, 309-323 respectively. Chapters 4-6 will appear in further issues of Vision Research. /TRRL/

  • Corporate Authors:

    Eindhoven University of Technology

    den Dolech 2, P.O. Box 513
    Eindhoven,   Netherlands  5600 MB
  • Authors:
    • Roufs, JAJ
  • Publication Date: 1973

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 158 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00261778
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Thesis
  • Files: ITRD, TRIS
  • Created Date: Nov 6 1974 12:00AM