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Split xr-perception chapter

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Erwan Normand
2024-09-24 15:09:19 +02:00
parent b8b799df3d
commit 20a37dd955
21 changed files with 198 additions and 147 deletions
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2-perception/xr-perception/4-results.tex
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@@ -14,7 +14,6 @@ Post-hoc pairwise comparisons were performed using the Tukey's Honest Significan
%
Each estimate is reported with its 95\% confidence interval (CI) as follows: \ci{\textrm{lower limit}}{\textrm{upper limit}}.
\subsubsection{Discrimination Accuracy}
\label{discrimination_accuracy}
@@ -57,7 +56,6 @@ Participants took longer on average to respond with the \level{Virtual} renderin
%
The \level{Mixed} rendering was in between (\geomean{1.56}{s} \ci{1.49}{1.63}).
\subsubsection{Finger Position and Speed}
\label{finger_position_speed}
@@ -75,19 +73,18 @@ All pairwise differences were statistically significant: \level{Real} \vs \level
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%This means that within the same time window on the same surface, participants explored the comparison texture on average at a greater distance and at a higher speed when in the real environment without visual representation of the hand (\level{Real} condition) than when in VR (\level{Virtual} condition).
\begin{subfigs}{results_finger}{%
Boxplots and geometric means of response time at the end of a trial, and finger position and finger speed measures when exploring the comparison texture, with pairwise Tukey's HSD tests: * is \pinf{0.05}, ** is \pinf{0.01} and *** is \pinf{0.001}.
}[%
\item Response time of a trial.
\item Distance traveled by the finger in a trial.
\item Speed of the finger in a trial.
]
\subfig[0.32]{results/trial_response_times}
\subfig[0.32]{results/trial_distances}
\subfig[0.32]{results/trial_speeds}
\begin{subfigs}{results_finger}{Results of the performance metrics for the rendering condition. }[
Boxplots and geometric means with bootstrap 95~\% confidence interval, with pairwise Tukey's HSD tests: * is \pinf{0.05}, ** is \pinf{0.01} and *** is \pinf{0.001}.
][
\item Response time at the end of a trial.
\item Distance travelled by the finger in a trial.
\item Speed of the finger in a trial.
]
\subfig[0.32]{results/trial_response_times}
\subfig[0.32]{results/trial_distances}
\subfig[0.32]{results/trial_speeds}
\end{subfigs}
\subsection{Questionnaires}
\label{questions}
@@ -95,13 +92,13 @@ All pairwise differences were statistically significant: \level{Real} \vs \level
%
Friedman tests were employed to compare the ratings to the questions (\tabref{questions}), with post-hoc Wilcoxon signed-rank tests and Holm-Bonferroni adjustment, except for the questions regarding the virtual hand that were directly compared with Wilcoxon signed-rank tests.
%
\figref{question_plots} shows these ratings for questions where statistically significant differences were found (results are shown as mean $\pm$ standard deviation):
\figref{results_questions} shows these ratings for questions where statistically significant differences were found (results are shown as mean $\pm$ standard deviation):
%
\begin{itemize}
\item \response{Hand Ownership}: participants slightly feel the virtual hand as their own with the \level{Mixed} rendering (\num{2.3 +- 1.0}) but quite with the \level{Virtual} rendering (\num{3.5 +- 0.9}, \pinf{0.001}).
\item \response{Hand Latency}: the virtual hand was found to have a moderate latency with the \level{Mixed} rendering (\num{2.8 +- 1.2}) but a low one with the \level{Virtual} rendering (\num{1.9 +- 0.7}, \pinf{0.001}).
\item \response{Hand Reference}: participants focused slightly more on their own hand with the \level{Mixed} rendering (\num{3.2 +- 2.0}) but slightly more on the virtual hand with the \level{Virtual} rendering (\num{5.3 +- 2.1}, \pinf{0.001}).
\item \response{Hand Distraction}: the virtual hand was slightly distracting with the \level{Mixed} rendering (\num{2.1 +- 1.1}) but not at all with the \level{Virtual} rendering (\num{1.2 +- 0.4}, \p{0.004}).
\item \response{Hand Ownership}: participants slightly feel the virtual hand as their own with the \level{Mixed} rendering (\num{2.3 +- 1.0}) but quite with the \level{Virtual} rendering (\num{3.5 +- 0.9}, \pinf{0.001}).
\item \response{Hand Latency}: the virtual hand was found to have a moderate latency with the \level{Mixed} rendering (\num{2.8 +- 1.2}) but a low one with the \level{Virtual} rendering (\num{1.9 +- 0.7}, \pinf{0.001}).
\item \response{Hand Reference}: participants focused slightly more on their own hand with the \level{Mixed} rendering (\num{3.2 +- 2.0}) but slightly more on the virtual hand with the \level{Virtual} rendering (\num{5.3 +- 2.1}, \pinf{0.001}).
\item \response{Hand Distraction}: the virtual hand was slightly distracting with the \level{Mixed} rendering (\num{2.1 +- 1.1}) but not at all with the \level{Virtual} rendering (\num{1.2 +- 0.4}, \p{0.004}).
\end{itemize}
%
Overall, participants' sense of control over the virtual hand was very high (\response{Hand Agency}, \num{4.4 +- 0.6}), felt the virtual hand was quite similar to their own hand (\response{Hand Similarity}, \num{3.5 +- 0.9}), and that the virtual environment was very realistic (\response{Virtual Realism}, \num{4.2 +- 0.7}) and very similar to the real one (\response{Virtual Similarity}, \num{4.5 +- 0.7}).
@@ -125,11 +122,16 @@ The vibrations were felt a slightly weak overall (\response{Vibration Strength},
% (Right) Load Index (NASA-TLX) questionnaire (lower values are better).
%}
\begin{subfigs}{question_plots}{%
Boxplots of responses to questions with significant differences and pairwise Wilcoxon signed-rank tests with Holm-Bonferroni adjustment: * is \pinf{0.05}, ** is \pinf{0.01} and *** is \pinf{0.001}.
}
\subfig[0.24]{results/questions_hand_ownership}
\subfig[0.24]{results/questions_hand_latency}
\subfig[0.24]{results/questions_hand_reference}
\subfig[0.24]{results/questions_hand_distraction}
\begin{subfigs}{results_questions}{Boxplots of the questionnaire results for the virtual hand renderings. }[
Pairwise Wilcoxon signed-rank tests with Holm-Bonferroni adjustment: * is \pinf{0.05}, ** is \pinf{0.01} and *** is \pinf{0.001}.
][
\item Hand ownership.
\item Hand latency.
\item Hand reference.
\item Hand distraction.
]
\subfig[0.24]{results/questions_hand_ownership}
\subfig[0.24]{results/questions_hand_latency}
\subfig[0.24]{results/questions_hand_reference}
\subfig[0.24]{results/questions_hand_distraction}
\end{subfigs}