deletions | additions       diff --git a/The_simplest_form_of_participation__.tex b/The_simplest_form_of_participation__.tex  index ebcc361..ec6f779 100644  --- a/The_simplest_form_of_participation__.tex  +++ b/The_simplest_form_of_participation__.tex 
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The simplest form of participation is a contactless interaction, typically in associated to the shared task, it involves an exchange of information or commands implicitly. The collaboration request can be correspond using gestures, vocal commands, or a combination of the two. When the user performs gestures (e.g., hand waving), the user's collaborative part is the one utilized for the user's gestures. If voice were used by the user (e.g., 'follow the right hand'), the collaborative part can be expressed in the vocal command or combined with the gesture (e.g., 'follow the right hand', showing the right hand) as illustrated in Figure 18 20