\clearpage
\pagestyle{empty}

\begin{figure}[t]
\hspace{12cm}
\includegraphics[width=0.15\textwidth]{Strathlogo}
\label{fig:infoSheet}
\end{figure}

\hspace{0.5cm}

\begin{center}
\Large
\textbf{INFORMATION SHEET}
\end{center}

\hspace{1cm}

\noindent
\textbf{Purpose of Study:} In this project, shared control has been incorporated in the immersive Virtual Reality (VR) wheelchair simulator. The intelligent wheelchair controller assists the driver in times of need such as to avoid obstacles, prevent collisions and aid in following a wall. The effectiveness of the shared control behaviours will be evaluated based on the driving experience of the volunteers in this study.\\

\noindent
\textbf{Investigators:} \href{http://www.strath.ac.uk/bioeng/contactus/bioengineeringstafflist/lakanyhebadr/}{Dr Heba Lakany}, \href{mailto:heba.lakany@strath.ac.uk}{heba.lakany@strath.ac.uk}, Lecturer, Department of Bioengineering\\
\noindent
Radhika Menon,
\href{mailto:radhika.menon@strath.ac.uk}{radhika.menon@strath.ac.uk}, Student, Department of Bioengineering\\

\noindent
\textbf{Location:} \href{http://www.strath.ac.uk/bioeng/}{Bioengineering Unit}, \href{http://www.strath.ac.uk/}{The University of Strathclyde}\\
\noindent
Wolfson Building, 106 Rottenrow Glasgow, G4 0NW\\

\noindent
\textbf{Participants:} We are aiming to recruit male and females with no visual disabilities. \textit{Please see next section for exclusion criteria}\\

\noindent
\textbf{Exclusion Criteria:} Subjects would be unsuitable for the study if they suffer from any of the following:
\begin{itemize}
\item {Visual disability that prevents them from viewing the wheelchair simulator on the screen or the slides shown on the laptop monitor}
\item {Physical disability that prevents them from operating the keys of a keypad that is used as the access device to control the wheelchair}
\item {Cyber sickness, which could be caused by the immersive effect created by the dome-shaped screen}\\
\end{itemize}

\noindent
\textbf{Requirements}: You will be asked to perform a number of tasks for which you need to know the following:\\
\begin{itemize}
\item {NASA-Task Load Index assessment procedure: After performing each task, you will be asked to rate the \textquoteleft{workload}' you experienced with the help of the NASA Task Load Index (NASA-TLX) scales. NASA-TLX is based on the concept that workload can be determined by considering the contributions of the six subscales, Mental Demand, Physical Demand, Temporal Demand, Performance, Effort and Frustration, in creating the workload. Please read the definitions of these rating scales in the sheet attached. It is important that you understand them well. If you have any questions, please ask them now. For each task you will perform, you will be provided with a Rating Sheet that has six scales corresponding to each of the six rating scales. Each line ranges from 0 to 100 and you are required to put an \textquoteleft{X}' mark at the point which, in your opinion, best describes the level you experienced. Note that performance ranges from \textquoteleft{good}' to \textquoteleft{poor}', on the scale from 0 to 100. After filling the Rating Sheet, you will given 15 cards, arranged in random order, each containing a pair of subscales. Select the subscale that contributed more towards the workload of the task. Please ensure that you are consistent in your reasoning for making these choices for all the tasks.}
\item {Keypad control: The wheelchair is operated using this keypad. Key 8 is for moving the wheelchair forward - with every key press, you enter the next speed level. There are 2 levels of speed. Key 4 is for left, 6 for right and 5 for stop. Key 2 is for slowing down the wheelchair and then reversing it. Please familiarise yourself with the keys. The wheelchair continues to move in the direction of your last command until you give a new command.}
\item {Secondary task: In addition to the primary task of wheelchair driving, you will be asked to perform a secondary task which involves responding to three different types of slides on a slideshow displayed on this laptop monitor, while simultaneously driving the wheelchair. A new slide appears every two seconds. The red slide requires you to turn your head away from the simulator screen and then quickly look back. When a slide containing a mathematical problem appears, please say the answer orally or at least read out the question. The white slide does not require you to do anything. Please adjust the placement of the laptop so that you are able to view both the simulator screen as well as the laptop monitor.}
\end{itemize}

\noindent
\textbf{Instructions}: Please keep the following in mind while performing the tasks:
\begin{itemize}
\item {Your priority is to drive safely, avoiding obstacles, and to complete the task as fast as possible. The primary task takes priority over the secondary task at all times. In doing the secondary task, respond as quickly and correctly as possible.}
\item {Modes of control: There are two ways of controlling the wheelchair - in manual mode, you are in full control of the wheelchair, and in shared control mode, you still control the the wheelchair, but it provides some assistance such as moving away from obstacles sensed by sensors placed along the front of the wheelchair. Obstacles to the sides and rear of the wheelchair cannot be detected. If the wheelchair stops and prevents you from moving in a particular direction, it is an indication that there is an obstacle in close proximity to you. Reverse the wheelchair and change your direction suitably to proceed.}\\
\end{itemize}

\noindent
\textbf{Experimental Procedure}: You will be given a few minutes to practice driving using the manual and shared control modes, following which you will perform the tasks listed below. At the end of each task, you will rate your experience using the NASA-TLX scales.
\begin{itemize}
\item {Secondary task: You will perform the secondary task without the primary task.}
\item {Obstacle Avoidance tasks: You will perform 4 driving tasks on the path shown to you in the Training Course map. These include driving in manual mode, with and without secondary task, and similarly for shared control.}
\item {Wall Following tasks: You will perform the same set of 4 tasks involving following a wall in an empty hall. Perform all the tasks using as few keypad inputs as possible. Decide on following either right or left wall. In shared control mode, the wheelchair detects the wall as you move close to it and follows the wall. It detects and negotiates corners as well. However, you may need to provide some correction if it does not turn properly or stops following the wall. At all times while following the wall, keep the wheelchair within an arm's distance from the wall. For a sense of distance, you can look at the tiles on the floor - keep within 6 tiles.}\\
\end{itemize}

\noindent
\textbf{Withdrawal:} Your willingness to participate is paramount. As a volunteer you can demand that the experiment be stopped at any point.\\

\noindent
\textbf{Risks: }The possibility of developing cyber sickness, i.e., motion sickness caused by the immersive virtual reality environment.\\

\noindent
\textbf{Data Protection:} Data will only be accessible via the researcher's computer or the departmental computer linked to the equipment, both of which require passwords to access and are stored in a safe location. Any data used will be anonymised before publication to protect the patients' identity.\\

\noindent
\textbf{Complaints:} Should you wish to complain to an independent person, you may contact \href{http://www.strath.ac.uk/bioeng/contactus/bioengineeringstafflist/cartlidgebrianmr/}{Mr. Brian Cartlidge},
\href{mailto:brian.cartlidge@strath.ac.uk}{brian.cartlidge@strath.ac.uk}, Bioengineering Unit, Room 4.02, \emph{Tel}: 0141 548 3283 (Ext. 3283).



\input{consentform2}






