Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Some observations on the pedestal effect

MPG-Autoren
/persons/resource/persons84314

Wichmann,  FA
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

Volltexte (beschränkter Zugriff)
Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte in PuRe verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Henning, G., & Wichmann, F. (2007). Some observations on the pedestal effect. Journal of Vision, 7(1): 3, pp. 1-15. doi:10.1167/7.1.3.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0013-CEEF-E
Zusammenfassung
The pedestal or dipper effect is the large improvement in the detectability of a sinusoidal grating observed when it is added
to a masking or pedestal grating of the same spatial frequency, orientation, and phase. We measured the pedestal effect
in both broadband and notched noiseVnoise from which a 1.5-octave band centered on the signal frequency had been
removed. Although the pedestal effect persists in broadband noise, it almost disappears in the notched noise. Furthermore,
the pedestal effect is substantial when either high- or low-pass masking noise is used. We conclude that the pedestal effect
in the absence of notched noise results principally from the use of information derived from channels with peak sensitivities
at spatial frequencies different from that of the signal and the pedestal. We speculate that the spatial-frequency components
of the notched noise above and below the spatial frequency of the signal and the pedestal prevent ‘‘off-frequency looking,’’
that is, prevent the use of information about changes in contrast carried in channels tuned to spatial frequencies that are
very much different from that of the signal and the pedestal. Thus, the pedestal or dipper effect measured without notched
noise appears not to be a characteristic of individual spatial-frequency-tuned channels.