Congruency effects in dot comparison tasks: convex hull is more important than dot area.

There were also significant interactions: age × dot area ratio, b = −.03, t (320) = −9.65, p < .001, age × numerical ratio, b = .01, t (320) = 2.86, p = .005, convex hull ratio × numerical ratio, b = −.03, t (80) = −5.01, p < .001, and a marginally significant interaction between age × convex hull ratio × numerical ratio, b = −.01, t (320) = −2.03, p = .044.

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