Objective: To adapt an existing computer-assisted program to help a post-coma man with extensive multiple disabilities choose between stimulus events.
Method: An adapted version of the program assessed in this study presented the man with 7-second samples of preferred and non-preferred stimuli, without questions, and allowed him to choose any of them through a vocalization response. The man's use of this response to choose a stimulus sample led the computer to present the matching stimulus for 20 seconds. The same response used immediately after the end of the 20-second stimulus presentation led to the repetition of that presentation.
Results: The adapted program version was effective in promoting high levels of choice among preferred stimuli and virtually no responding in relation to non-preferred stimuli. Indices of happiness were frequent during the program sessions.
Conclusions: Computer-assisted programs for stimulus choice might be successfully adapted to post-coma persons with extensive disabilities.
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http://dx.doi.org/10.3109/17518423.2010.519761 | DOI Listing |
PLoS One
December 2024
Computer, Computational, and Statistical Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, United States of America.
Crowdsource platforms have been used to study a range of perceptual stimuli such as the graphical perception of scatterplots and various aspects of human color perception. Given the lack of control over a crowdsourced participant's experimental setup, there are valid concerns on the use of crowdsourcing for color studies as the perception of the stimuli is highly dependent on the stimulus presentation. Here, we propose that the error due to a crowdsourced experimental design can be effectively averaged out because the crowdsourced experiment can be accommodated by the Thurstonian model as the convolution of two normal distributions, one that is perceptual in nature and one that captures the error due to variability in stimulus presentation.
View Article and Find Full Text PDFBehav Res Ther
December 2024
Department of Psychology, Liaoning Normal University, Dalian, 116029, China.
Objectives: This study aimed to investigate the characteristics of attentional capture by reward signals in individuals with depression during classical conditioning.
Methods: A variant of the additional singleton paradigm was adopted with a high- or low-reward signal as the prominent distracting stimulus. In Experiment 1, 46 participants with depressive symptoms and 46 healthy controls were asked to conduct a keypress response to the visual target.
Neural Netw
October 2023
University of Rijeka, Rijeka, Croatia.
Accentuation has been proposed as a general principle of perceptual organization. Here, we have developed a neurodynamic architecture to explain how accentuation affects boundary segmentation and shape perception. The model consists of bottom-up and top-down pathways.
View Article and Find Full Text PDFJ Exp Anal Behav
November 2024
Utah State University, Logan, UT, USA.
Impulsive choice describes a preference for a smaller-sooner reward (SSR) over a larger-later reward (LLR). A large body of research has examined different procedures for decreasing impulsive choice in nonhuman subjects. One limitation of these procedures is the extensive training duration required to achieve the desired results.
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