Recent research is exploring ways to use virtual reality (VR) to help people in a variety of ways. In one published study, researchers examined whether VR could help people get over the discomfort they feel after riding rollercoasters. Participants whose lifelong dreams were to ride rollercoasters without feeling noxious were recruited to participate in the research. Some participants were randomly assigned into the control group, where no VR treatment was provided before riding the rollercoaster (instead, they received an encouraging pep talk from the experimenter). The rest of the participants were put in the treatment group, where they first put on a VR headset and experienced a virtual rollercoaster before riding the real thing. After both groups of participants completed the rollercoaster ride, both survey and physiological measures were collected. The subjective and objective measures for each participant were summed to create a discomfort index, which ranges from scores of 1 (low discomfort) to 25 (high discomfort). A summary of the data from the study is provided below.No VR Treatment (Control)VR Treatmentn = 19n = 23M = 24M = 21SS = 210SS = 184a.) What sort of research design was used in this study? How do you know?b.) Conduct the appropriate hypothesis test to determine whether there was a significant difference in discomfort scores between the control group and the VR treatment group. Use α = .05.c.) Calculate the effect size of the VR treatment on discomfort scores using Cohen’s d. Briefly explain what this value means.

Name: Recent research is exploring ways to use virtual reality (VR) to help
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Description: Recent research is exploring ways to use virtual reality (VR) to help people in a variety of ways. In one published study, researchers examined whether VR could help people get over the discomfort they feel after riding rollercoasters. Participants w

Provided information is, No VR Treatment VR Treatment n= 19 n= 23 M= 24 M= 21…

Answered: No VR Treatment (Control) VR Treatment…

MATLAB: An Introduction with Applications

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Author:Amos Gilat

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Recent research is exploring ways to use virtual reality (VR) to help people in a variety of ways. In one published study, researchers examined whether VR could help people get over the discomfort they feel after riding rollercoasters. Participants whose lifelong dreams were to ride rollercoasters without feeling noxious were recruited to participate in the research. Some participants were randomly assigned into the control group, where no VR treatment was provided before riding the rollercoaster (instead, they received an encouraging pep talk from the experimenter). The rest of the participants were put in the treatment group, where they first put on a VR headset and experienced a virtual rollercoaster before riding the real thing. After both groups of participants completed the rollercoaster ride, both survey and physiological measures were collected. The subjective and objective measures for each participant were summed to create a discomfort index, which ranges from scores of 1 (low discomfort) to 25 (high discomfort). A summary of the data from the study is provided below.

No VR Treatment (Control)	VR Treatment
n = 19	n = 23
M = 24	M = 21
SS = 210	SS = 184

a.) What sort of research design was used in this study? How do you know?

b.) Conduct the appropriate hypothesis test to determine whether there was a significant difference in discomfort scores between the control group and the VR treatment group. Use α = .05.

c.) Calculate the effect size of the VR treatment on discomfort scores using Cohen’s d. Briefly explain what this value means.

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