Data for 8 Ss were obtained with a modified technique for a category scale, a ratio estimation scale, and a free number production scale. When these are compared with previous data of Ekman and Rosner, the need for further research is clear.
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References
1.
EkmanG.Is the power law a special case of Fechner's law?Percept. mot. Skills, 1964, 19, 730.
2.
RosnerR. S.The power law and subjective scales of number. Percept. mot. Skills, 1965, 21, 42.
