While counting four objects, Lesedi says '1, 2, 4, 8' one time and '2, 1, 4, 8' the next time. This demonstrates that Lesedi has failed to master the ____ principle of counting.

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The stable-order principle of counting states that counting must proceed in a fixed order, such as 1, 2, 3, 4. Lesedi's inconsistent counting sequence shows that she has not mastered the idea of a stable order. The principle of cardinality refers to the idea that the last number counted in a sequence represents the total number of objects being counted. The one-to-one principle states that there must be one and only one number name for each object counted. Habituation is a psychological principle related to decreasing responsiveness over time to repeated stimuli.

While Counting Four Objects, Lesedi Says '1, 2, 4, 8