Current Psychology

, Volume 9, Issue 1, pp 25–34 | Cite as

Critical flicker fusion in normal elderly subjects; a cross-sectional community study

  • S. Curran
  • I. Hindmarch
  • J. P. Wattis
  • C. Shillingford
Articles

Abstract

Critical Flicker Fusion Thresholds (CFFTs) were measured in 644 elderly people identified from community-based general practice records, and the relationship of CFFT with age was investigated. The CFFT was measured using the method of limits with mean scores for three ascending (flicker/fusion) and three descending (fusion/flicker) presentations being recorded. The difference between the ascending and descending means was found to be significantly correlated with age (r=−0.131,P<0.001) and may reflect a reduced sensitivity of the Central Nervous System to suprathreshold flicker with increasing age. The results suggest that CFFT measurement has an important role to play in gerontological research as an objective measure of cognitive aspects of the ageing process.

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Copyright information

© Springer 1990

Authors and Affiliations

  • S. Curran
    • 1
  • I. Hindmarch
    • 1
  • J. P. Wattis
    • 2
  • C. Shillingford
    • 3
  1. 1.Human Psychopharmacology Research Unit, Department of PsychologyThe UniversityLeeds
  2. 2.St. James University HospitalLeeds
  3. 3.Interphase (UK) Ltd.UK

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