## 3 Re-Usable Re-Constructible Sensor Device
### Software
#### 3.3.1 Intelligent Calibration
The size of the zones is chosen to depict the expected movement of their shapes--the red zone is smaller to visually give the impression that the red shape is expected to move much less than the blue one. The software interface is shown in Figure 7.

The screens also had a written information section asking the user to perform the desired actions. A separate visual depiction section showed the expected outcome of the shapes' movement and their final resting places for proper calibration. This software was written in Java and used serial communication to retrieve real-time data from the Arduino Nano. It also uses in-built graphics commands to move the shapes _vertically_ according to the reading from the distance sensor. The software is capable of recording the time series when being used, and we used these data for post analysis with deep learning. ### The Trials

The trials consisted of an initial survey for each individual, followed by participants independently constructing the device with the given kit, configuring it personally, and setting it up. Figure 7: Screenshot of the software in use. #### 4.2.1 Surveys

Data in this study were collected primarily through questionnaires administered to participants at specific points during the study. The first survey consisted of a total of 16 agreement statements, measured using a 5-point Likert scale, and three free-text questions. The questions were grouped according to specific themes identified a priori. This survey was given to participants to complete immediately after the assembly and installation of the motion sensor device. The second survey consisted of 13 agreement statements measured on a 5-point Likert scale and 3 free-text questions. This survey was given to participants to complete after five days of using the motion sensor device. The survey questions were an adaptation of the technology assistance model [43; 44], which has been used and adapted over the years to evaluate the perceived ease of use and usefulness of devices. #### 4.2.2 Observations

In addition to the surveys, participants were observed, and notes were taken on the behaviors shown in response to the testing process. These notes will be discussed after the descriptive statistics in the results section. In design research, observation serves as a valuable tool that can reveal insights participants may be unaware of. Participants may struggle with a particular aspect or misinterpret an instruction. By having a designer observe these behaviors, they can identify the causes of the mistakes and determine what changes need to be made to the design to prevent them from happening. These data will be organized into categories based on ease of use, user attitude towards the product, prior knowledge and experience, product performance, behavioral intention, and circular design principles. #### 4.2.3 Procedures

The pilot testing of the device development revealed several issues with the procedure, including folding problems, orientation issues with the instructions, and an unclear user interface, which made task completion too difficult for participants. As such, adjustments were made to ensure that participants could complete the assembly and installation as intended. For example, pilot testing of the assembly process revealed that, as currently designed, the internal folded component of the device was too complex for a beginner to fold. As such, this component would be given to participants pre-folded. This decision enabled the testing to proceed on schedule without necessitating a redesign of the internal component within the study timeframe. Before testing began, the selected participants were emailed a consent form and an installation guide for the software required for testing. Testing with the participants was conducted in their offices to replicate the assembly process as it would appear in the final product. Participants were presented with the kit and received a brief introduction to the project, including its purpose and the structure of the assembly session.