Ngo, Hood, Martin, Painter, Smith & Zappavigna (2022: 174):
The three images in (10) show variations in SCOPE of paralinguistic deixis through vectors expressed with hand or fingers. SCOPE varies from relatively [broad] via the palm of the hand in image 1, to relatively [narrow] via an index finger in image 2, to maximally [narrow] via a little finger in image 3.
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To be clear, these gestures make exophoric reference to metaphenomena in the environment of the paralanguage through physical contact. The identity that recoverable from the different finger gestures in the second and third images is a written word [narrow], whereas the identity that recoverable from the splayed hand gesture is a written paragraph [broad]. The efficacy of the latter gesture diminishes rapidly with distance between the gesture and the referent. Again, 'broad' and 'narrow' are features that distinguish the size of referents. They are not deictic in function because they do not make distinctions with regard to the here-&-now of the speaker/gesturer.
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