Evaluation of Critical Flicker-Fusion Frequency Measurement Methods for the Investigation of Visual Temporal Resolution

Auria Eisen-Enosh, Nairouz Farah, Zvia Burgansky-Eliash, Uri Polat, Yossi Mandel

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Recent studies highlight the importance of the temporal domain in visual processing. Critical Flicker-Fusion Frequency (CFF), the frequency at which a flickering light is perceived as continuous, is widely used for evaluating visual temporal processing. However, substantial variability in the psychophysical paradigms, used for measuring CFF, leads to substantial variability in the reported results. Here, we report on a comprehensive comparison of CFF measurements through three different psychophysical paradigms: methods of limits; method of constant stimuli, and staircase method. Our results demonstrate that the CFF can be reliably measured with high repeatability by all three psychophysics methods. However, correlations (r = 0.92, p<0.001) and agreement (Bland Altman test indicated 95% confidence limit variation of ±3.6 Hz), were highest between the staircase and the constant stimuli methods. The time required to complete the test was significantly longer for the constant stimuli method as compared to other methods (p < 0.001). Our results highlight the suitability of the adaptive paradigm for efficiently measuring temporal resolution in the visual system.

Original languageEnglish
Article number15621
JournalScientific Reports
Issue number1
StatePublished - 1 Dec 2017

Bibliographical note

Funding Information:
The authors would like to acknowledge Dr. Yoram Bonneh for insightful discussions and suggestions. The research was supported by the Israeli Ministry of Health, by LIROT - Israeli Research Association for Eye Health and Blindness Prevention as a research grant to YM and UP (3–10471) and by the Israeli Science Foundation to YM (157–16) and UP (1825–16).

Publisher Copyright:
© 2017 The Author(s).


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