## 3 Methods
### Experimental Procedures  
Prior to the experiment, participants received a link to their individual Lookback sessions. Once the link was accessed upon the scheduled time of the experiment, a recording of the participant's screen and webcam was automatically initiated, alongside the audio input of both the participant and the moderator. After being welcomed to the experiment, the moderator proceeded to confirm that the participant consented to participation in the experiment, as well as to the recording of the session, screen, and physiological data. The moderator also validated that the informed consent form, sent 24 h prior to the experiment, was read, signed, and returned. Following this, the moderator confirmed that the participant was alone in a quiet room free of distractions. In order to limit potential distractions, participants were informed to close any unnecessary windows on their computer and set their phone to silent mode. A visual scan was performed by the moderator, ensuring that the participant had conformed to the experiment. Conformity required a set of functioning headphones with an integrated microphone that did not obscure the participant's face. Figure 3: The electrodes placed on the participant’s non-dominant hand are connected to sensor cables wired to the COBALT Bluebox device. Image source: [PERSON], [PERSON], [PERSON], [PERSON], [PERSON], and [PERSON] (2021). The response to impactful interactivity on spectators’ engagement in a digital game. Multimodal Technologies and Interaction, 4(89), 89–89. [[https://doi.org/10.3390/mti4040089](https://doi.org/10.3390/mti4040089)]([https://doi.org/10.3390/mti4040089](https://doi.org/10.3390/mti4040089)), accessed on 20 December 2021. The participant was then guided, with step-by-step instructions, to install the physiological instruments, which had previously been delivered to the participant's location. The EDA electrodes were placed on the lower part of participant's non-dominant palm. In other words, the hand that was not used to control the mouse. More precisely, the electrodes were placed on the thenar and hypothenar eminence regions of the palm vis-a-vis the thumb and pinky fingers for optimal EDA data to be recorded [80]. Electrodes were wired to COBALT Bluebox technology, allowing for the participant's physiological data to be recorded. A depiction of the electrode placements wired to a COBALT Bluebox device is found below in Figure 3. Unlike Figure 3, the COBALT Bluebox device was placed in proximity to the participant's non-dominant hand on a stable surface. A validation of the cloud recording was confirmed by the moderator, ensuring that the sensors were fully functional. A sequence of flashing lights upon the COBALT Bluebox device served as a visual marker confirming the synchronization of the data. Developed by [PERSON] et al. [81], the synchronization technique used ensured the Bluetooth low energy (BLE) (Montreal, QC, Canada) signals were sent to the lightbox and BITalino device in range [82]. In the presence of the moderator, participants embarked on the first task, consisting of a voice calibration in which they were instructed to clearly read a series of words and short sentences with a two second pause between each utterance. The implicit measures obtained during the calibration phase served as a baseline for emotional valence and arousal, as the randomized selection of words aimed to be as neutral as possible. Once the calibration phase was completed, a brief introduction and set of instructions regarding the experiment were provided to the participants. More precisely, the participant was informed that an interaction with a voice user interface was to occur and that the calibration was to be repeated following the voice user interface's instructions. In addition to the calibration, the participant was informed that the voice user interface would be conducting a short interview and that the questions posed by the interface should be responded to with either a \"yes\" or \"no\" response.