Two Generalized Ratio Scaling Methods

Ekman, Gösta

doi:10.1080/00223980.1958.9916259

Cited by 161 publications

(63 citation statements)

References 6 publications

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“…In the subjective metric, the model for the fractionation task is simply Under this assumption, the observed variable duration should be proportional to the standard duration, regardless of the value of the exponent in the psychophysical function. This striking relation, due to Ekman (1958), has been well supported in virtually every study that has used the fractionation technique for judgments of duration. Thus, existing data support the joint assumption that the underlying fractionation model of Equation 2 is correct, and that the psychophysical function is a power function.…”

Section: The Methods Of Fractionationmentioning

confidence: 80%

Subjective duration: A functional measurement analysis

Blankenship

Anderson

1976

Perception & Psychophysics

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Subjects judged the total duration of two intervals of time that varied from 0 to 30 sec. The data obeyed the parallelism prediction of a simple weighted adding model. According to functional measurement methodology, this observed parallelism provides joint support for the adding model and for the assumption that the graphic rating response provides a valid interval scale. Furthermore, parallelism allowed construction of the psychophysical time function. The obtained function was essentially linear in the range 0·30 sec. This result is compared with results of previous studies, with particular regard to the method of fractionation. The usefulness of establishing a validated interval response measure for further studies of time perception was pointed out..

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Section: The Methods Of Fractionationmentioning

confidence: 80%

Subjective duration: A functional measurement analysis

Blankenship

Anderson

1976

Perception & Psychophysics

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“…One way. first mentioned by Ekman (1958) ..... -iS to rescale. the stimulus in terms of level above threshold: if a constant magnitude.…”

mentioning

confidence: 99%

On the general form of Stevens’ law for loudness and softness

Irwin

Corballis

1968

Perception & Psychophysics

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“…Th e seq uence of work load s was chosen in such a way that when a subject had comp ared each load with the immediately preceding load , he had performed all possible pair wise comparison s between the load s. Since the sequence of the work load s was also perform ed in reverse order, a complete ma tri x of relati ve comparisons between case weights was obtained for each subject. On the basis of these matrices, a scale of perceived work load was calcul ated fo r each subject acco rding to Ekman (9). With the same methods, a subjective scale was also calculated for all the subjects o n the basis of a ratio matrix of geometric mean values.…”

Section: Magnitude Estima T Ion (Melmentioning

confidence: 99%

Perception of effort in manual materials handling.

Gamberale¹

1990

Scand J Work Environ Health

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1GAMBERALE F. Perception of effort in manual materials handling. Scand J Wo rk En viron Health 1990; 16(suppl I):59-66. Measurement of subjective work load has emerged as a central topic of interest in the study of physical work and effort. From the practical point of view, subjective estimates of physical effort can contribute greatly to the assessment of work loads in physical activities and to the design of manual handling tasks. The rationa le of this approach is that subjective estimates reflect the individual perception of the amount of physical and motivational resources that the subjects invest to meet the demand imposed by the physical task. The present paper provides an illustration of some of the techniques used in measuring the perception of physical effort and reviews and discusses the main results obtained with these techniques in the assessment of manual materials handling.

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Two Generalized Ratio Scaling Methods

Cited by 161 publications

References 6 publications

Subjective duration: A functional measurement analysis

Subjective duration: A functional measurement analysis

On the general form of Stevens’ law for loudness and softness

Perception of effort in manual materials handling.

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