A PSYCHOPHYSICAL APPROACH TO AGEING

  • Ana Garriga-Trillo

Abstract

From its very beginning psychophysics related subjective phenomena with physical variables using an exact science, mathematics, for its formulation (Fechner, 1860). Although this seems to be a totally objective method, extreme positions have been raised throughout time dichotomising reality into either cognitive or sensory approaches even though there is plenty of data for and against both sides. A reconciliation has been proposed within measurement theory (Garriga-Trillo, 1995) and in a complementarity theory of psychophysics arguing that the same phenomena should be conceptualised in both ways (Baird, 1997). Within this realm we will present data from two psychophysical experiments exploring what variables really determine our responses when assessing different distances within their city and time spans. Due to our growing elderly population, our samples will include different age ranges. Results show that: cognitive responses are mainly explained by its sensory stimuli in both time and distance domains, and distance and time estimations are influenced by age.

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