We explored the perceptual structure of facial expressions of six basic emotions, varying systematically in intensity, in adults and children aged 7 and 14 years. Multidimensional scaling suggested that three- or four-dimensional structures were optimal for all groups. Two groups of adults demonstrated nearly identical structure, which had…

Third and fifth grade children (average age 8.6 and 10.6 years) and adult participants were tested with printed words of varying length in a new on-line identification task (the luminance increment paradigm, LIP) and a speeded naming task. Effects of general length (length in letters, phonemes and syllables) were shown to decrease systematically…