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. Author manuscript; available in PMC: 2010 Mar 31.
Published in final edited form as: Acta Paediatr. 2009 Oct 22;99(2):225–229. doi: 10.1111/j.1651-2227.2009.01562.x

Figure 1. Experimental set-up and procedure.

Figure 1

Brain activation was measured using a Hitachi ETG-100 optical topography system, in which two probes arrayed 2×2, and mounted on a flexible cap, were placed over the right and left frontal areas of each child’s head.

Task Non-task interval
(baseline)		 Task stimulation Non-task interval
(baseline)		 Task stimulation
Duration (Sec) 60 180 60 180

Task 1 (picture book reading) was engagement in picture book reading with their mothers. Task 2 (video viewing) was viewing of the book-on-video (included generic female voice) on a 19-inch LCD monitor. Duration of task stimulus was 180 sec, preceded by a 60-sec non-task interval. During the non-task interval, meaningless animation was displayed on the monitor. Children were randomized to begin with Task 1 followed by Task 2, or to begin with Task 2 followed by Task 1. Each child was given one trial.