Gibson, E. J., Osser, H., Schiff, W., & Smith, J., 1963
Gibson, E. J., Osser, H., Schiff, W., & Smith,
J. (1963). An analysis of critical features of letters,
tested by a confusion matrix. Cooperative Research Project
No. 639, U.S. Dept. of Education
Summary:
Procedure:
Tested children's judgments of the similarity of letters..