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phd-thesis/3-manipulation/visual-hand/3-3-ranks.tex
2024-06-27 22:51:32 +02:00

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\subsubsection{Ranking}
\label{sec:ranks}
\begin{subfigs}{ranks}{%
Experiment \#1. Boxplots of the ranking (lower is better) of each visual hand rendering
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and pairwise Wilcoxon signed-rank tests with Holm-Bonferroni adjustment:
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** is \pinf{0.01} and * is \pinf{0.05}.
}
\subfig[0.24]{results/Ranks-Push}[Push Task]
\subfig[0.24]{results/Ranks-Grasp}[Grasp Task]
\end{subfigs}
\figref{ranks} shows the ranking of each visual hand rendering for the Push and Grasp tasks.
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Friedman tests indicated that both ranking had statistically significant differences (\pinf{0.001}).
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Pairwise Wilcoxon signed-rank tests with Holm-Bonferroni adjustment were then used on both ranking results (see \secref{metrics}):
\begin{itemize}
\item \textit{Push Ranking}: Occlusion was ranked lower than Contour (\p{0.005}), Skeleton (\p{0.02}), and Mesh (\p{0.03});
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Tips was ranked lower than Skeleton (\p{0.02}).
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This good ranking of the Skeleton rendering for the Push task is consistent with the Push trial results.
\item \textit{Grasp Ranking}: Occlusion was ranked lower than Contour (\p{0.001}), Skeleton (\p{0.001}), and Mesh (\p{0.007});
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No Hand was ranked lower than Skeleton (\p{0.04}).
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A complete visual hand rendering seemed to be preferred over no visual hand rendering when grasping.
\end{itemize}