The Development of Automaticity in Accessing Number Magnitude.

Traced developmental changes in automatic and intentional processing of Arabic numerals using numerical-Stroop paradigm in two studies. In numerical comparison task, found that congruent physical sizes facilitated and incongruent sizes interfered with numerical comparison at all ages relative to neutral control. In physical comparison task, found that incongruity between physical and numerical size affected only older children and adults. (Author/KB)