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  m-Alternative-Forced-Choice: Improving the Efficiency of the Method of Constant Stimuli

Jäkel, F., Hill, J., & Wichmann, F. (2004). m-Alternative-Forced-Choice: Improving the Efficiency of the Method of Constant Stimuli. Poster presented at 7th Tübingen Perception Conference (TWK 2004), Tübingen, Germany.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-D9FB-A Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-65EF-D
Genre: Poster

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Urheber

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 Urheber:
Jäkel, F1, 2, Autor           
Hill, J1, 2, Autor           
Wichmann, FA1, 2, Autor           
Affiliations:
1Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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Schlagwörter: -
 Zusammenfassung: We explored several ways to improve the efficiency of measuring psychometric functions without resorting to adaptive procedures. a) The number m of alternatives in an m-alternative-forced-choice (m-AFC) task improves the efficiency of the method of constant stimuli. b) When alternatives are presented simultaneously on different positions on a screen rather than sequentially time can be saved and memory load for the subject can be reduced. c) A touch-screen can further help to make the experimental procedure more intuitive. We tested these ideas in the measurement of contrast sensitivity and compared them to results obtained by sequential presentation in two-interval-forced-choice (2-IFC). Qualitatively all methods (m-AFC and 2-IFC) recovered the characterictic shape of the contrast sensitivity function in three subjects. The m-AFC paradigm only took about 60 of the time of the 2-IFC task. We tried m=2,4,8 and found 4-AFC to give the best model fits and 2-AFC to have the least bias.

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Sprache(n):
 Datum: 2004-02
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: BibTex Citekey: 2637
 Art des Abschluß: -

Veranstaltung

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Titel: 7th Tübingen Perception Conference (TWK 2004)
Veranstaltungsort: Tübingen, Germany
Start-/Enddatum: 2004-01-30 - 2004-02-01

Entscheidung

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Projektinformation

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Titel: 7th Tübingen Perception Conference: TWK 2004
Genre der Quelle: Konferenzband
 Urheber:
Bülthoff, HH1, Herausgeber           
Mallot, HA, Herausgeber           
Ulrich, RD, Herausgeber
Wichmann, FA1, Herausgeber           
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Ort, Verlag, Ausgabe: Kirchentellinsfurt, Germany : Knirsch
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 118 Identifikator: ISBN: 3-927091-68-5