## 4 Results
### Summary of Reviewed Studies  
Table 10 summarizes information on the 23 reviewed studies, including the authors, publication year, input/output modalities, and output devices used in the reviewed MI systems; brief descriptions of the objectives of the studies; and patterns (PAT) of the MI system architecture, as illustrated in Figure 4. In this table, the \"Output devices\" column lists devices that are used to present data arriving from an MI system to an agent, while an interaction device refers to a device that can present AR content to an agent. Therefore, it is important to note that the smartwatch used in the MI system that was proposed by [PERSON] et al. [34] is not an interaction device, but an output device; the researchers used a smartwatch to deliver data from IoT devices in textual form. \begin{table}
\begin{tabular}{p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt} p{56.9 pt}} \hline \hline
**Authors** & **Input Modalities** & **Output Modalities** & **Output Devices** & **Objectives** & **PAT** \\ \hline
[35] & Vision (camera view for AR marker detection), Touch (tactility: machine control) & Vision (2D/3D graphics) & Tablet PC & AR application for monitoring the power state of a coffee maker. & Figure 4a \\ \hline
[39] & Vision (camera view for AR marker and plane detection), Touch (tactility: touchscreen) & Vision (2D/3D graphics) & Smartphone & Serious game to raise awareness of air pollution problems. & Figure 4b \\ \hline
[50] & Vision (camera view for object recognition), Touch (tactility: touchscreen) & Vision (2D/3D graphics, device control [smart object]) & Vision (2D/3D graphics, device control [smart object]) & & A system that presents the status and enables the manipulation of real-world objects that are recognized/tracked by data from IoT devices. & Figure 4c \\ \hline
[36] & Vision (camera view for AR marker detection), Touch (tactility: touchscreen) & Vision (2D/3D graphics) & Mobile device (smartphone, tablet PC) & Allows the agent to find items from a smart shelf using RFID data. & Figure 4a \\ \hline
[38] & Vision (camera view for image recognition) & Vision (2D/3D graphics), Audition (audio effect [alarm]) & HMD (wearable glasses) & Task procedure visualization with a safety warning system (for sending alarms to agents) that can sense problems using data from IoT devices that are held by the agent. & Figure 4b \\ \hline
[45] & Vision (camera view for hand gestures, head movement [gaze]), Audition (voice), Kineshetics (kinematics: measuring the distance between an agent and a selected tool while detecting the pick-up motion; proprioception: hand gesture) & Vision (2D/3D graphics) & HMD (HoloLens) & Figure 4a \\ \hline
[33] & Vision (camera view for color and object recognition), Touch (tactility: touchscreen) & Vision (2D/3D graphics) & Smartphone & Visualization of IoT device data using emojis. & Figure 4a \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Summary of reviewed studies. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Authors** & **Input Modalities** & **Output Modalities** & **Output Devices** & **Objectives** & **PAT** \\ \hline \multirow{9}{*}{[46]} & Vision (camera view for image recognition), Touch (tactility: touchscreen), Kinesthetics (propriroception: hand position [virtual button]) & Vision (2D/3D graphics) & Mobile device (smartphone, tablet PC) & A prototype AR application that can visualize either the information of an art object (_The Starry Night_ painting by [PERSON]) for museum visitors, or data of IoT devices in the museum for administrators. & & & \\ \cline{1-1} \cline{2-6}  & Vision (position of object by light density resistor), Kinesthetics (kinematics: movement of smart object by hand) & Vision (2D/3D graphics) & TV screen & Testing the the agent’s upper limb disorder by moving a smart object on a smartboard. AR content is presented on a TV screen, while data from IoT devices are presented on the smartboard.