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Erwan Normand
2024-09-25 17:25:13 +02:00
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3-manipulation/visual-hand/2-method.tex
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@@ -50,7 +50,7 @@ We aim to investigate whether the chosen visual hand rendering affects the perfo
\subsection{Manipulation Tasks and Virtual Scene}
\label{tasks}
Following the guidelines of \textcite{bergstrom2021how} for designing object manipulation tasks, we considered two variations of a 3D pick-and-place task, commonly found in interaction and manipulation studies \cite{prachyabrued2014visual,maisto2017evaluation,meli2018combining,blaga2017usability,vanveldhuizen2021effect}.
Following the guidelines of \textcite{bergstrom2021how} for designing object manipulation tasks, we considered two variations of a 3D pick-and-place task, commonly found in interaction and manipulation studies \cite{prachyabrued2014visual,blaga2017usability,maisto2017evaluation,meli2018combining,vanveldhuizen2021effect}.
\subsubsection{Push Task}
\label{push-task}
@@ -72,15 +72,15 @@ However, this time, the target volume can spawn in eight different locations on
Users are asked to grasp, lift, and move the cube towards the target volume using their fingertips in any way they prefer.
As before, the task is considered completed when the cube is \emph{fully} inside the volume.
\begin{subfigs}{tasks}{The two manipulation tasks wof the user study. }[
The cube to manipulate is in the middle of the table (5-cm-edge and opaque) and the eight possible targets to reach are arround (7-cm-edge volume and semi-transparent).
\begin{subfigs}{tasks}{The two manipulation tasks wof the user study.}[
The cube to manipulate is in the middle of the table (\qty{5}{cm} edge and opaque) and the eight possible targets to reach are arround (\qty{7}{cm} edge volume and semi-transparent).
Only one target at a time was shown during the experiments.
][
\item Push task: pushing the virtual cube along a table towards a target placed on the same surface.
\item Grasp task: grasping and lifting the virtual cube towards a target placed on a \qty{20}{\cm} higher plane.
]
\subfig[0.4]{method/task-push}
\subfig[0.4]{method/task-grasp}
\subfig[0.45]{method/task-push}
\subfig[0.45]{method/task-grasp}
\end{subfigs}
\subsection{Experimental Design}
@@ -128,7 +128,7 @@ First, participants were given a consent form that briefed them about the tasks
Then, participants were asked to comfortably sit in front of a table and wear the HoloLens~2 headset as shown in~\figref{tasks}, perform the calibration of the visual hand size as described in~\secref{apparatus}, and complete a \qty{2}{min} training to familiarize with the \AR rendering and the two considered tasks.
During this training, we did not use any of the six hand renderings we want to test, but rather a fully-opaque white hand rendering that completely occluded the real hand of the user.
Participants were asked to carry out the two tasks as naturally and as fast as possible.
Similarly to \cite{prachyabrued2014visual, maisto2017evaluation, blaga2017usability, vanveldhuizen2021effect}, we only allowed the use of the dominant hand.
Similarly to \cite{prachyabrued2014visual,maisto2017evaluation,blaga2017usability,vanveldhuizen2021effect}, we only allowed the use of the dominant hand.
The experiment took around 1 hour and 20 minutes to complete.
\subsection{Participants}