Table 1.

Experimental procedure for the corpus under consideration in the present analyses.

Phase	Goal	Structure	Duration
Phase I: Item	Arrange all puzzle pieces for Bloco objects in identical patterns on their individual workspaces	No turn-taking instructions from experimenter; completely free conversation	Mean time = 8.26 min Mean turns = 14.38 turns
Phase II: Build	Assemble all puzzle pieces to create identical Bloco objects in their individual workspaces	Instruction cards divided in alternating order between both participants to create alternating instruction givers; otherwise completely free conversation	Mean time = 23.34 min Mean turns = 19.07 turns