Perception & Psychophysics

, Volume 2, Issue 9, pp 421–422 | Cite as

Preparation of ambiguous stimulus materials

  • Gerald H. Fisher


The problem of ensuring that ambiguous figures are equally probable in the appearance of each of their two alternative and mutually exclusive aspects is discussed. Failure to consider this problem raises difficulties for interpretation of the results of experiments in which such figures are used. A method of preparing and evaluating the extent to which ambiguous figures are equivocal according to acceptable criteria is described and illustrated. This yields a new ambiguous figure, each alternative aspect of which becomes apparent with approximately the same frequency.


Sampling Distribution Sensory Organization Probable Figure Adjacent Pair Acceptable Criterion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Boring, E. G. A new ambiguous figure.Amer. J. Psychol., 1930, 42, 444–445.CrossRefGoogle Scholar
  2. Botwinick, I. Husband and father-in-law: A reversible figure.Amer. J. Psychol., 1961, 74, 312–313.CrossRefGoogle Scholar
  3. Leeper, R. W. A study of a neglected portion of the field of learning: The development of sensory organization.J. genet. Psychol., 1935, 46, 41–75.Google Scholar

Copyright information

© Psychonomic Society, Inc. 1967

Authors and Affiliations

  • Gerald H. Fisher
    • 1
  1. 1.University Of Newcastle Upon TyneEngland

Personalised recommendations