Individual differences in preschoolers' spatial thinking: Comprehension of dimensional adjectives and their relation to children's performance on non-verbal spatial tasks.

The current study explores whether individual differences in the dimensional adjectives (e.g., big, tall) children understand , relates to individual differences in two non-verbal spatial abilities, spatial scaling and mental transformations, in bilingual children. The inclusion of English-Spanish bilingual children broadens the work in this area which has previously focused strictly on English language. Ninety-two English-Spanish bilingual children between 37.65 and 71.87 months (42 male) participated in the study. Results show number of dimensional adjectives preschool children comprehend utilizing a new interactive, tablet-based task relates to performance on non-verbal spatial tasks. This research supports hypothesized relations between spatial language comprehension and spatial abilities, introduces an effective tool for examining spatial language comprehension in young children, and improves generalizability by including a bilingual sample and testing comprehension in both English and Spanish.