Publications by authors named "Josie Stephens"

2 Publications

  • Page 1 of 1

Effects of prolonged exposure to feedback delay on the qualitative subjective experience of virtual reality.

PLoS One 2018 24;13(10):e0205145. Epub 2018 Oct 24.

Department of Psychology, Faculty of Science and Health, University of Essex, Colchester, Essex, United Kingdom.

When interacting with virtual environments, feedback delays between making a movement and seeing the visual consequences of that movement are detrimental for the subjective quality of the VR experience. Here we used standard measures of subjective experiences such as ownership, agency and presence to investigate whether prolonged exposure to the delay, and thus the possibility to adapt to it, leads to the recovery of the qualitative experience of VR. Participants performed a target-tracking task in a Virtual Reality environment. We measured the participants' tracking performance in terms of spatial and temporal errors with respect to the target in both No-Delay and Delay conditions. Additionally, participants rated their sense of "ownership" of holding a virtual tool, agency and presence on each trial using sliding scales. These single trial ratings were compared to the results of the more traditional questionnaires for ownership and agency and presence for both No-Delay and Delay conditions. We found that the participants' sliding scales ratings corresponded very well to the scores obtained from the traditional questionnaires. Moreover, not only did participants behaviourally adapt to the delay, their ratings of ownership and agency significantly improved with prolonged exposure to the delay. Together the results suggest a tight link between the ability to perform a behavioural task and the subjective ratings of ownership and agency in virtual reality.
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April 2019

Ensuring head and neck oncology patients receive recommended pretreatment dental evaluations.

J Oncol Pract 2015 Mar 27;11(2):151-4. Epub 2015 Jan 27.

Brigham and Women's Hospital; Dana-Farber Cancer Institute; Center for Clinical Excellence, Brigham and Women's Hospital, Boston, MA; and Center for Oncology Care at Erie County Medical Center, Buffalo, NY.

Purpose: Head and neck (H&N) cancer therapy can have a detrimental effect on oral health by increasing the risk of dry mouth, dental caries, dental infection, and osteonecrosis of the jaw. Pretreatment dental evaluations are recommended for patients with H&N cancer before radiation therapy to minimize the risk of acute and long-term adverse effects. In an earlier effort to educate patients and community dentists about the importance of pretreatment dental evaluations, we created a dental instructional guide (DIG) that outlines the necessary components of the preradiation dental evaluation. Yet our program did not have a system for documenting which patients received the DIG. The aim of this project was to create a reliable system to ensure that patients are given the DIG before radiation therapy and that such patients are readily identifiable, allowing us to confirm that their dental evaluations are complete before starting treatment.

Methods: We implemented a tracking template within the H&N oncology program at the Dana-Farber Cancer Institute that documents the date, patient, and clinician who gave the DIG. We used the Model for Improvement methodology and performed plan-do-study-act (PDSA) cycles to test and monitor the results of the template implementation.

Results: We showed a significant improvement in the rate of DIG documentation from a baseline of 0% (range, 0% to 0%) to a mean of 53% (range, 0% to 100%) over 3 months (P < .01).

Conclusion: This intervention was the first step in creating a sustainable system for ensuring timely preradiation dental evaluation, thereby decreasing the risk of dental complications from H&N cancer therapy.
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March 2015