The consistency of the partitions into equal intervals of a sensory distance by the successive bisections and ratio judgment tasks was tested. Three different groups of subjects partitioned the sensory distance between two brightnesses. The first group bisected the distance between the standards and subsequently bisected the distance between the lower standard brightness and the first bisector. The second and the third groups selected a brightness so that its distance from the higher standard brightness was, respectively, two or three times its distance from the lower standard brightness. The number of intervals involved by successive bisections did not coincide with that involved by ratio judgment of sensory distances. It can be concluded that the two psychophysical tasks involve inconsistent partitions of the same sensory distance.
Partitions of a sensory interval by successive bisections and ratio judgment of sensory distances
TOMMASI, Marco
1999-01-01
Abstract
The consistency of the partitions into equal intervals of a sensory distance by the successive bisections and ratio judgment tasks was tested. Three different groups of subjects partitioned the sensory distance between two brightnesses. The first group bisected the distance between the standards and subsequently bisected the distance between the lower standard brightness and the first bisector. The second and the third groups selected a brightness so that its distance from the higher standard brightness was, respectively, two or three times its distance from the lower standard brightness. The number of intervals involved by successive bisections did not coincide with that involved by ratio judgment of sensory distances. It can be concluded that the two psychophysical tasks involve inconsistent partitions of the same sensory distance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
