RELATIONAL STIMULUS GENERALIZATION AND TRANSPOSITION IN THE YOUNG CHICKEN ÌS PSYCHOPHYSICS: WITHIN OR BETWEEN DESIGNING?
In our former experiments on the young chicken Ìs psychophysical performance we investigated the role of a context-dependent test-series manipulation mostly on the basis of a between-designing methodology (e.g., Sarris, 1998, 2006; Hauf et al., 2008). In the present study of successive instead of simultaneous stimulus presentation during training and testing, a within- versus between-design procedure was used to investigate different groups of infant chickens for two different perceptual dimensions, size and colour. Naturally the successive/within-design task for each chicken is much harder to accomplish than that of the common simultaneous/between-group procedure (2AFC task, in both cases). The findings of this comparative method-oriented investigation will be presented and discussed in the light of our previous developmental paradigm of relational psychophysics.