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Modeling Confidence and Response Time in Brightness Discrimination: Testing Models of the Decision Process with Controlled Variability in Stimulus Strength

Intermaggio, Victor G.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1337642308

Abstract Details

2012, Master of Arts, Ohio State University, Psychology.
We applied a sequential sampling model (RTCON2; Ratcliff & Starns, submitted) to confidence judgments from a brightness discrimination task. Subjects in the experiments were asked whether test items were bright or dark, and responded with one of six possible choices that ranged from “very sure dark” to “very sure bright”. The confidence judgment and response time data are qualitatively similar to those typically found in recognition memory tasks. We fitted RTCON2 to the data and used the model to explain the mechanisms underlying the confidence judgment decision process. Because this was a perceptual task, we were able to control the stimulus strength values (brightness) and the variability of those values within an experimental condition. This allowed us to test the model's assumptions and quality of measurement of an important model component: between-trial variability in stimulus strength. We demonstrate the utility of RTCON2 when used in conjunction with explicit knowledge of external stimulus strength values. We also implement and discuss other applications of the combination of control over perceptual stimuli with the computational process model of RTCON2.
Roger Ratcliff, PhD (Advisor)
Gail McKoon, PhD (Committee Member)
Trisha Van Zandt, PhD (Committee Member)
93 p.
Behavioral Sciences; Cognitive Psychology; Experimental Psychology; Psychology; Quantitative Psychology
Sequential Sampling Models; Diffusion Model; Confidence; Confidence Judgments; Simple Decision; Multichoice Decisions; Response Time; Brightness Discrimination

Recommended Citations

Citations

  • Intermaggio, V. G. (2012). Modeling Confidence and Response Time in Brightness Discrimination: Testing Models of the Decision Process with Controlled Variability in Stimulus Strength [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337642308

    APA Style (7th edition)

  • Intermaggio, Victor. Modeling Confidence and Response Time in Brightness Discrimination: Testing Models of the Decision Process with Controlled Variability in Stimulus Strength. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1337642308.

    MLA Style (8th edition)

  • Intermaggio, Victor. "Modeling Confidence and Response Time in Brightness Discrimination: Testing Models of the Decision Process with Controlled Variability in Stimulus Strength." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337642308

    Chicago Manual of Style (17th edition)

osu1337642308
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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.