Sequential effects in a gustatory detection task: community between both psychophysics

Sequential effects in a gustatory detection task: communality between both psychophysics. Response bias has been studied differently depending on the nature of the technique employed: if it belongs to local or to global psych ophysics. This work studies the possibility of finding one type of response bias, sequential effects, usually associated with techniques from global p sychophysics, in techniques within local psychophysics as was first propose d in Villarino and Garriga-Trillo (1993). Hits and false alarms, considerin g two gustatory stimuli, are influenced by sequential variables. The existe nce of these effects is theoretically relevant. One would have to reject th e local psychophysical assumption that subjects responses are stable over t ime. It will also favor the communality between the two psychophysics and w ill back up the idea of Luce (1990), Garriga-Trillo (1995) and Baird (1997) that some phenomena revealed within local and global psychophysics are the same.