Figure 3.10 | A Context Effect on Perception | The interpretations of the ambiguous characters composing the second item in the first series and the fourth item in the second series are determined by the context created by the items on each side of them. In the first series, these items are letters so the interpretation of the ambiguous characters is a letter, B. In the second series, the items are numbers so the interpretation is a number, 13.
(Sensation and Perception (6th ed.), by S. Coren, L. M. Ward, & J. T. Enns, 2004, New York: Wiley. ISBN: 0471272558.)