In which sensorimotor substage would an infant most likely repeatedly throw a ball down the stairs?

A) mental representations
B) secondary circular reactions
C) motor reflexes
D) tertiary circular reactions

Sensorimotor Substage

The earliest developmental stage in Piaget's theory of cognitive development, spanning from birth to approximately two years of age, focusing on physical interaction and exploration of the environment.

Secondary Circular Reactions

A Piagetian developmental stage in which infants repeat pleasing actions with their bodies and manipulable objects.

Tertiary Circular Reactions

Advanced repetitive behaviors in infants where they experiment with new variations of actions to see outcomes, indicating cognitive development.