How does the difference threshold for a stimulus relate to the intensity of the stimulus?
AbstractThe present study was concerned with Weber’s Law as it is related to the discriminability of the lengths of lines. Experiments were conducted to investigate three questions: (I) Is Weber’s Law equally applicable to simultaneous and nonsimultaneous viewing conditions? (2) Is the relationship between the stimulus sizes and the values ofDLs described more adequately by the function proposed by Weber or a generalized Weber’s Law stated by Miller? and (3) Is Weber’s Law better approximated by proximal or distal size? It was demonstrated that the discriminability of the lengths of lines follows Weber’s Law under the nonsimultaneous viewing condition, but not under the simultaneous viewing condition. Under the nonsimultaneous viewing condition, it was noted that the generalized Weber’s Law as stated by Miller described the relationship between the DL and stimulus size significantly better than the function proposed by Weber. From the results pertaining to the third question, it was not possible to determine whether the proximal or the distal size follows Weber’s Law more closely. Show
References
Download references Author informationAuthor notes
Authors and Affiliations
Authors
Additional informationThis article is based on a doctoral dissertation submitted to Stanford University in 1965. The author wishes to thank his thesis advisor, Albert H. Hastorf for providing continued and invaluable advice. Further thanks are due to Douglas H. Lawrence, Donald Kennedy, and Richard C. Atkinson, who served on the thesis committee. Rights and permissionsAbout this articleCite this articleOno, H. Difference threshold for stimulus length under simultaneous and nonsimultaneous viewing conditions. Perception & Psychophysics 2, 201–207 (1967). https://doi.org/10.3758/BF03213050 Download citation
Keywords
How is stimulus intensity related to absolute thresholds?Absolute threshold is the smallest level of energy required by an external stimulus to be detectable by the human senses, including vision, hearing, taste, smell and touch. It is more precisely defined as the degree of intensity of a stimulus necessary to correctly detect that stimulus 50% of the time.
What is the threshold stimulus intensity?'Threshold' conveys the suggestion of a stimulus intensity below which no neural activity is elicited. However, in practice, neurons are rarely silent, and their activity, even with a fixed stimulus, shows variability or 'noise.
What is the relationship between the intensity of the stimulus and the intensity of the sensation?Intensity of a sensation is directly proportional to the intensity of the physical stimulus raised to a constant power.
How the just noticeable difference can change as a function of stimulus intensity?Stimulus Intensity
The intensity level of the stimulus can also play a role in how much people notice changes. If a light is very, very dim, people might be more likely to notice smaller changes in intensity than they would if those same changes were made to brighter light.
|