Letter Similarity Data Set Archive

Kuennapas & Janson, 1969

Kuennapas, T. & Janson, A. (1969). Multidimensional similarity of letters. Perceptual and Motor Skills, 28, 3-12.



Experimenters asked subjects to judge pair-wise similarities of 28 lowercase Swedish Letters. Letters were presented in pairs on printed sheets. Height of 'n' was 2.8 cm, height of 'p' or 'h' was 4.0 mm.


The 28 lowercase letters. This excludes the 'w' of the English alphabet, and includes three accented vowels. Figure 1 from the article, reproduced below, shows the letters and font used.

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