2.2.2. Results

Initially, participants would reach out to grab the jug handle, but appeared uncertain and hesitate, the "pick me up" voice then confirmed their intention. The time taken to pick up the jug was significantly quicker in the no lights case than in the lights case at trial 8 [t(19) = 1.195, *p* < 0.05] (Figure 8). The number of attempts before the "pick me up" voice was not required was not different between the lights and the no lights conditions: mean number of attempts for the lights group was 4.18 (±3.52) and in the no lights group 3.5 (±1.9). Thus, it took around 4 attempts for participants

2.2.2. Results

tasks.

to be confident that they could pick up the jug when the handle had risen, rather than wait for the audio prompt. 4.18 (±3.52) and in the no lights group 3.5 (±1.9). Thus, it took around 4 attempts for participants to be confident that they could pick up the jug when the handle had risen, rather than wait for the audio prompt.

between the lights and the no lights conditions: mean number of attempts for the lights group was

Initially, participants would reach out to grab the jug handle, but appeared uncertain and hesitate, the "pick me up" voice then confirmed their intention. The time taken to pick up the jug was significantly quicker in the no lights case than in the lights case at trial 8 [t(19) = 1.195, *p* < 0.05]

*Sensors* **2017**, *17*, 2308 8 of 16

strip turned on at full brightness. If the jug had not been picked up after six seconds, the LED strip flashed and the audio prompt of "Pick me up" was played. Once the jug had been picked up (determined by the FSR going to zero), the timer stored this time and reset. Once the participant had picked up the jug, a cup lit up and the audio prompt "pour me" was played. The timer ended when the jug was poured (tilt switch that triggered at an angle of 30°). This procedure was repeated using either the dominant or the non-dominant hand, using LED to indicate correct or distraction cups, and using two different sounds: a "pour me" voice command and the sound of the water pouring. This was done to test the effectiveness of different types of audio prompts. In terms of the 'correct or distraction' using LEDs, when the participant was about to perform an action with an object, another object cued the participant to use it instead. For example, when a participant was about to pour into a cup, the LED on the cup turned red and another cup turned green. This tested whether the cues can stop a current action and change an intention. At the end of the eight tasks in this trial, participants were interviewed to ask about their preference for and interpretation of the different cues that were employed, and were asked to explain what decisions they were making during the

**Figure 8.** Time to complete tasks in trial one. Times for trials with and without lights are compared to a baseline condition (in which participants picked up the jug as soon as they were instructed by the experimenter). **Figure 8.** Time to complete tasks in trial one. Times for trials with and without lights are compared to a baseline condition (in which participants picked up the jug as soon as they were instructed by the experimenter).

All participants poured into the cup that was lit up and responded correctly to the vocal prompt. After the cup was lit, some participants would wait for the sound before beginning to pour. All participants poured into the cup that was lit up and responded correctly to the vocal prompt. After the cup was lit, some participants would wait for the sound before beginning to pour.

None of the participants poured into an unlit cup and all the participants responded to the distraction correctly, i.e., participants stopped pouring when the light on the cup turned red and poured into another cup that turned green. There was no difference in the time taken to pour between the lights and no lights. None of the participants poured into an unlit cup and all the participants responded to the distraction correctly, i.e., participants stopped pouring when the light on the cup turned red and poured into another cup that turned green. There was no difference in the time taken to pour between the lights and no lights.
