Abstract
The present longitudinal study repeatedly tested motor development in 345 infants at ages 3, 6, and 9 months in two eco-cultural contexts (German middle-class and Cameroonian Nso). To analyze differential motor developments and its co-determinants (parental education and growth in weight), person-centered analyses (hierarchical cluster analyses) were applied. Results indicate that cluster analyses of fine motor development scores led to two culture-mixed cluster groups. Four cluster groups were extracted in the gross motor domain showing differential growth curves. Differential growth curves were partly explained by education of mother and weight trajectories. Besides considering methodological aspects, inter-individual differences of intra-individual change within and across eco-cultural contexts are discussed.
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