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. Author manuscript; available in PMC: 2009 Jul 24.
Published in final edited form as: Autism Res. 2009 Feb;2(1):2–21. doi: 10.1002/aur.61

Figure 6.

Figure 6

An illustration of the continuous nature of joint attention development. Development is modeled as a spiral in which the initial acquisition of the capacity for integrated processing of information about self and other attention (joint attention) remains an active but deeper layer of cognitive activity throughout life that supports symbolic thought, language and cultural social exchange. Numbers of the spiral bands represent changing phases of development. The letters on each side of the spiral bands represent change and continuity in multiple developmental factors which may impact joint attention development, such as speed of information processing, representational development, and memory.