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This paper presents and discusses the methodology and results of studies on respiratory sensation byusing a fuzzy set category judgement model and applying the concept of just noticeable difference (JND)step and equivalent sensation. A new kind of category scale, the multistage evaluation scale (MES), based on a fuzzy set categoryjudgement model for quantifying respiratory sensory magnitude has been put forward and verified in 37subjects. The perceived magnitude of added resistance estimated using MES could reflect properly thedifference in sensory perception caused by added loads with equal intensity but applied to different phasesof the breathing cycle. In addition, the psychophysical function obtained conforms to the Stevens’ powerlaw. On the contrary, the classical category scale does not possess some of these attributes. In 9 subjects, we determined that the sensory continuum corresponding to either inspiratory or ex-piratory added resistive load, ranging 10-500 mm H_2O· 1~(-1)·s, consisted of 6
This paper presents and discusses the methodology and results of studies on respiratory sensation byusing a concept of just noticeable difference (JND) step and equivalent sensation. A new kind of category scale, the multistage evaluation scale (MES ) based on a fuzzy set category judgement model for quantifying respiratory sensory magnitude has been put forward and verified in 37sjects. The perceived magnitude of added resistance estimated using MES could reflect properly thedifference in sensory perception caused by added loads with equal intensity but applied to different In the other, the psychophysical function obtained conforms to the Stevens’ powerlaw. On the contrary, the classical category scale does not possess some of these attributes. In 9 subjects, we determined that the sensory continuum corresponding to either inspiratory or ex-piratory added resistive load, ranging 10-500 mm H 2 O · 1 -1 s, consisted of 6