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  • Psychophysical scaling based on the perception of the form of continuous stimulus increment with time : a preliminary study
    Brenk, Klas Matija ; Podlesek, Anja
    A direct psychophysical scaling method of perceive form of stimulus increment with time has been lately studied mostly by phychologists from the Department of psychology in Zagreb. In experiment on ... brightness perception (Bujas, Rohaček, Mayer, Vodanović, 1984) discontinuous slide-projection through filters of different grays was used. Stimulus intensity function producing the linear impression was inverted to estimate the psychophysical function. The method has not been used often, presumably because it was time-consuming and demanding. A computer application, which provides a continuous intensity change, was written to resemble the conditions in natural environment better. Preliminary measurements were done and a comparison with the study of Bujas et al. (1984) was made. Higher power-function exponents were obtained consistently (0.82 to 1.05). The results were also much more interpersonally variable. Some feasible explanations are discussed, including differences in room illumination, shape of presented stimulus functions, background colour, display characteristics and continuity of stimulus change.
    Vir: Review of Psychology : international journal of Croatian Psychological Association. - ISSN 1330-6812 (Vol. 4, No. 1-2, 1997, str. 7-13)
    Vrsta gradiva - članek, sestavni del
    Leto - 1997
    Jezik - angleški
    COBISS.SI-ID - 42607105

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