The emotional state that makes Diego start crying because he thinks his sister has more juice illustrates the concept of centration in the context of cognitive development in early childhood.
In psychology, the cognitive-developmental stage theory defined centration as the propensity to focus on one important feature of a situation while ignoring other potentially important parts.
Diego focus on his sister's glass which is longer but ignored the content of juice in the glass.
Therefore, this scenario illustrates the concept of centration.
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