Lab 1 - Psychophysics video W2024

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Toronto Metropolitan University *

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802

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Mechanical Engineering

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Apr 3, 2024

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BME 802 - Human-Computer Interaction Lab 1 BME 802 Lab 1: Psychophysics Video Introduction Psychophysics is the study of the role a person’s sensory processes have in perceiving information and responding to stimuli. There are many sensory modalities: vision, hearing, touch, taste and smell. Psychophysical experimentation is very important in the field of human- computer interaction. Several companies use the results of sensory modality studies in research and development ranging from human controlled digital systems to human piloted vehicles [1]. Results from adaptation and visual discrimination tests can be used to design novel user interfaces. For example, the limitation of reaction times can be used in the design of vehicle capabilities, road curvatures, and road signs. Subjective magnitude and threshold studies have been essential in the design of assistive hearing devices, also consumer grade products such as smart watches and bone conduction headphones. The human ability to discriminate between incoming sounds can be used to optimize sirens and alarms to be difficult to ignore [1]. In all cases, it is clear that for properly designed human-computer interactions, one must first understand the limitations of the physical response. Lab Exercise In this assignment you are asked to prepare a multimedia instructional video, tutorial, or training program for conducting a psychophysics experiment. You will be creating a video in a group of 2 students from your tutorial group. The video should cover details from the design and execution of the experiment, as well as some basic analysis of the results. You are required to find test subjects outside your group. This can be anyone from other students to family friends. You must draft a basic consent form for test subjects, including permission for recording and release of footage. If you need to change groups, please notify your T.A. Part 1 - Experiment Design 1. Choose a sensory modality, and specify the stimulus parameters. 2. Your group can choose from one of the options below for developing an experiment to showcase in the video: ○ Subjective magnitude ○ Threshold detection ○ Discrimination ○ Adaptation 3. Design the experiment (control variables, subject instructions, randomization, signal presentation, recording plan etc.). 4. Submit a research proposal that contains answers for Steps 1 to 3 to your TA. The research proposal can be a maximum of 1 page. To be submitted in Week 4 (week of January 29 th , 2024). 5. Prepare consent forms for test subjects outside your group (TMU has templates and ethical requirements available online). 6. Carry out the experiment on a minimum of 6 subjects. 1

Part 2 - Multimedia Demonstration ○ You can record your video using a zoom meeting or have members film separately at home. ○ Your tutorial must include some text information; however, not all the information should be conveyed in text. ○ Use a multimedia video with sound to support the text information. ○ The video should be approximately 5 minutes long. ○ One member of the group needs to upload the video to D2L. ○ Videos will be viewed and shared during the tutorial in which they are due. Due Date: 3 weeks (submit by start of the tutorial in the week of February 12 th , 2024) Marking Scheme Experimental Setup ( correct methodology, control of experimental variables and extraneous inputs, choice of subjects, response methodology) /5 Organization ( completeness with conciseness) /5 Clarity ( use of text, images and narration, presentation of results and conclusions ) /5 Multimedia Use ( quality and creativity) /5 Research Proposal completion (1), Consent form by each non-group member participant (2), Participation (2) /5 References [1] F.A.A Kingdon. (2012). “Psychophysics” - chapter The Encyclopedia of Human Behavior (Second Edition). 2

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