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- W2734515586 abstract "Psychophysical data from dual-presentation tasks are often collected with the two-alternative forced-choice (2AFC) response format, asking observers to guess when uncertain. For an analytical description of performance, psychometric functions are then fitted to data aggregated across the two orders/positions in which stimuli were presented. Yet, order effects make aggregated data uninterpretable, and the bias with which observers guess when uncertain precludes separating sensory from decisional components of performance. A ternary response format in which observers are also allowed to report indecision should fix these problems, but a comparative analysis with the 2AFC format has never been conducted. In addition, fitting ternary data separated by presentation order poses serious challenges. To address these issues, we extended the indecision model of psychophysical performance to accommodate the ternary, 2AFC, and same–different response formats in detection and discrimination tasks. Relevant issues for parameter estimation are also discussed along with simulation results that document the superiority of the ternary format. These advantages are demonstrated by fitting the indecision model to published detection and discrimination data collected with the ternary, 2AFC, or same–different formats, which had been analyzed differently in the sources. These examples also show that 2AFC data are unsuitable for testing certain types of hypotheses. MATLAB and R routines written for our purposes are available as Supplemental Material, which should help spread the use of the ternary format for dependable collection and interpretation of psychophysical data." @default.
- W2734515586 created "2017-07-21" @default.
- W2734515586 creator A5009545214 @default.
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- W2734515586 date "2017-07-12" @default.
- W2734515586 modified "2023-10-18" @default.
- W2734515586 title "The Indecision Model of Psychophysical Performance in Dual-Presentation Tasks: Parameter Estimation and Comparative Analysis of Response Formats" @default.
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- W2734515586 doi "https://doi.org/10.3389/fpsyg.2017.01142" @default.
- W2734515586 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5506217" @default.
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