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. Author manuscript; available in PMC: 2020 Apr 21.
Published in final edited form as: Proc ACM Interact Mob Wearable Ubiquitous Technol. 2018 Sep;2(3):90. doi: 10.1145/3264900

Table 1.

Experiment procedure describing the steps performed by each participant in order.

Section Step Description
3.3.1 Informed Consent Researcher explained the study to participants and answered participants’ questions about the study and a set of pre-questionnaires were administered: Eating habit questionnaire (emotional[76], hedonic[69], binge[24], impulsive[40]). Social media usage and privacy expectation [See supplement material]. Privacy Attitude [8].
3.3.2 Wearable Devices One camera design assigned to participant (chest, shoulder or wrist).
Participants selected a neck-worn sensor design of their choice.
Participant wore the smartwatch.
3.3.3 Structured Activities Participants were asked to perform the following activities while wearing the devices assigned to them:

  • Walk on Michigan Avenue and ask a stranger for directions.

  • Eat at home or in a restaurant.

  • Go to a coffee shop and order water or a drink.

  • Use a bathroom.

  • Check email.

  • Use an ATM.
3.3.3 Unstructured Activities Participants were instructed to continue wearing the devices for at least two additional hours while performing any activity of their choice. (See Table 3 for list of activities performed by participants)
3.3.4 Post-Experiment Questionnaire Participants were asked to answer open-ended questions about their experiences while wearing the device in the wild. [See supplement material]
3.3.5 Other Cameras Participants were asked to don the two remaining camera designs. They were asked to engage in structured activity that included going to the supermarket, using a computer, eating a snack and looking at themselves in the mirror. After wearing each camera design they were asked open-ended questions about the camera.
3.3.6 Video Review Participants were asked to look at the videos they captured with each wearable camera and to delete any segments that they did not want to share with the research team. They were administered another set of questions after viewing the video to test whether the perceived burden of wearing the camera changed after viewing the video. [See supplement material]
3.3.7 Interview Semi-structured interview to probe the participants about answers they provided in the post-experiment questionnaire.