The stage of tertiary circular reactions is when infants begin experimenting with thought and deed.

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Quizplus · Accepted Answer

The statement is true. Tertiary circular reactions occur between 12 months and 18 months of age, during which infants engage in purposeful experimentation with objects and their environment, using trial-and-error problem-solving strategies. This stage marks the beginning of symbolic representation and mental manipulation, as infants combine their newfound motor skills with increasing cognitive abilities.

The Stage of Tertiary Circular Reactions Is When Infants Begin