Letter Similarity Data Set Archive

Boles & Clifford, 1989

Boles, D.B., & Clifford, J.E. (1989). An upper- and lowercase alphabetic similarity matrix, with derived generation similarity values. Behavior Research Methods, Instruments, & Computers, 21, 579-586.


All pairs of uppercase and lowercase were judged by participants for their visual similarity.


Each letter pairs was presented horizontally. Participants rated the pairs on visual similarity, with 1 representing low similarity and 5 representing high similarity.


The characters were not italicized and were without serifs.


Results are available here. These were taken from D. B. Boles own transcription, also found here.

Back to main Letter Similarity Data Set Archive Page