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@@ -35,7 +35,7 @@ Our approach was to design visual augmentations of the hand and delocalized hapt
We first considered \textbf{(1) the visual augmentation of the hand} and then the \textbf{(2)} combination of different \textbf{visuo-haptic feedback of the hand when manipulating virtual objects}.
In \chapref{visual_hand}, we investigated the visual feedback of the virtual hand as an augmentation of the real hand.
Seen as an \textbf{overlay on the user's hand}, such visual hand renderings provide feedback on hand tracking and interaction with virtual objects.
Seen as an \textbf{overlay on the user's hand}, it provides feedback on hand tracking and interaction with virtual objects.
We compared the six commonly used visual hand augmentations in the \AR literature in a user study with 24 participants, where we evaluated their effect on user performance and experience in two representative manipulation tasks.
The results showed that a visual hand augmentation improved user performance, perceived effectiveness and confidence, with a \textbf{skeleton-like rendering being the most performant and effective}.
This rendering provided a detailed view of the tracked phalanges while being thin enough not to hide the real hand.