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The multidimensional structure of spatial ability remains a debated issue. However, the developmental trajectories of spatial skills have yet to be investigated as a source of evidence within this debate. We tested the intrinsic versus extrinsic and static versus dynamic dimensions of the Uttal et al. (2013, Psychol. Bull., 139, 352) typology in relation to spatial development. Participants (N = 184) aged 6-11 completed spatial tasks chosen to measure these spatial dimensions. The results indicated that the developmental trajectories of intrinsic versus extrinsic skills differed significantly. Intrinsic skills improved more between 6 and 8 years, and 7 and 8 years, than extrinsic skills. Extrinsic skills increased more between 8 and 10 years than intrinsic skills. The trajectories of static versus dynamic skills did not differ significantly. The findings support the intrinsic versus extrinsic, but not the static versus dynamic dimension, of the Uttal et al. (2013, Psychol. Bull., 139, 352) typology., (© 2021 The Authors. British Journal of Developmental Psychology published by John Wiley & Sons Ltd on behalf of British Psychological Society.)

The assessment of psychomotor development in young children from low‐ and middle‐income countries is impeded due to the lack of tools specifically designed for these resource‐constrained contexts. This cross‐sectional study aimed at analysing the measurement properties of the Kilifi Developmental Inventory (KDI) in two‐year‐old children. We administered the KDI to 289 children from Côte d'Ivoire and 230 children from Ghana. The postulated internal structure with two first‐order latent variables (locomotor performance and eye‐hand coordination) that loaded on a second‐order latent variable (psychomotor functioning) was supported. The reliability of most factors and scales was sufficient. Interrater reliability of most items was acceptable. Correlations were weak between the scale scores and age and gender, respectively. The findings are limited by the restricted age range of the sample. Overall, the KDI showed promising measurement properties for the assessment of psychomotor performance in children from sub‐Saharan countries. [ABSTRACT FROM AUTHOR]