Fix in acronyms
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@@ -27,7 +27,7 @@ In order not to influence the perception, as vision is an important source of in
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\label{apparatus}
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An experimental environment was created to ensure a similar visual rendering in \AR and \VR (\figref{renderings}).
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It consisted of a \qtyproduct{300 x 210 x 400}{\mm} medium-density fibreboard (MDF) box with a paper sheet glued inside and a \qtyproduct{50 x 15}{\mm} rectangle printed on the sheet to delimit the area where the tactile textures were rendered.
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It consisted of a \qtyproduct{300 x 210 x 400}{\mm} medium-density fibreboard box with a paper sheet glued inside and a \qtyproduct{50 x 15}{\mm} rectangle printed on the sheet to delimit the area where the tactile textures were rendered.
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A single light source of \qty{800}{\lumen} placed \qty{70}{\cm} above the table fully illuminated the inside of the box.
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Participants rated the roughness of the paper (without any texture augmentation) before the experiment on a 7-point Likert scale (1~=~Extremely smooth, 7~=~Extremely rough) as quite smooth (\mean{2.5}, \sd{1.3}).
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@@ -51,7 +51,7 @@ They also wore headphones with a brown noise masking the sound of the voice-coil
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The user study was held in a quiet room with no windows.
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\begin{subfigs}{setup}{Visuo-haptic textures rendering setup. }[][
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\item HoloLens~2 \OST-\AR headset, the two cardboard masks to switch the real or virtual environments with the same field of view, and the \ThreeD-printed piece for attaching the masks to the headset.
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\item HoloLens~2 \OST-\AR headset, the two cardboard masks to switch the real or virtual environments with the same \FoV, and the \ThreeD-printed piece for attaching the masks to the headset.
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\item User exploring a virtual vibrotactile texture on a real sheet of paper.
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]
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\subfigsheight{48.5mm}
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@@ -38,7 +38,7 @@ All pairwise differences were statistically significant.
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\label{response_time}
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A \LMM \ANOVA with by-participant random slopes for \factor{Visual Rendering}, and a log transformation (as \response{Response Time} measures were gamma distributed) indicated a statistically significant effect on \response{Response Time} of \factor{Visual Rendering} (\anova{2}{18}{6.2}, \p{0.009}, see \figref{results/trial_response_times}).
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Reported response times are \GM.
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Reported response times are geometric means (GM).
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Participants took longer on average to respond with the \level{Virtual} rendering (\geomean{1.65}{\s} \ci{1.59}{1.72}) than with the \level{Real} rendering (\geomean{1.38}{\s} \ci{1.32}{1.43}), which is the only statistically significant difference (\ttest{19}{0.3}, \p{0.005}).
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The \level{Mixed} rendering was in between (\geomean{1.56}{\s} \ci{1.49}{1.63}).
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