My husband, who was born with little use of his arms and legs, moves his head and body to gesture, it’s that integral a part of communication. He’s pretty effective with it, too, but also struggles to give me directions (get that bug in front of you, to the right, up, etc) when he can’t actually point to the thing.
He doesn’t think in ‘pointing’ or waving a hand or an arm, however, and as a writer has noticed that he needs to add those things in specifically because they are foreign to him. To him, gesturing is nodding, pointing with his chin, etc.
There is a disjunction between Tversky’s insistence that gesture is required for direction-giving (I tried it it with hands under and it’s easy) and here picture of the mind-map in virtual space which clearly doesn’t need it. I guess you’ld have to read the book to see if the big picture is better but the extracts used in this review are not promising.
I suggest that if a participant’s goal at the outset is to disprove a theory, then the experiment is flawed. I do agree that a more thorough reading is required before drawing meaningful conclusions.
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