Children completed three types of equivalent cardination tasks which assessed the influence of different stimulus configurations (linear, linear-nonlinear, and nonlinear), and density of object spacing. Prior results reported by Siegel, Brainerd, and Gelman and Gallistel were not replicated. Implications for understanding cardination concept…

Dutch researchers investigated the effects of Obuchova's method of teaching measurement to kindergarten children with no knowledge of conservation or seriation. Results indicated training was highly effective. Skills were transferred to conservation tasks not taught in training. Transfer to concepts not included in training was also observed. (SM)