Jean Piaget perceives __________ to be __________. Lev-Vygotsky believes __________ to be __________.

Correct Answer: The correct option is "Egocentric speech, a sign of cognitive immaturity; private speech, effective in self-regulation".

Step-by-Step Explanation:
To understand the difference in perspectives between Jean Piaget and Lev Vygotsky regarding children's self-talk, let us break down their key developmental theories:

1. Jean Piaget's View:
Piaget referred to young children talking to themselves as "egocentric speech." He believed that children are egocentric in their early stages of cognitive development, meaning they struggle to perceive points of view other than their own. Piaget viewed egocentric speech as a sign of cognitive immaturity that naturally fades away as the child develops socialized speech and mature cognitive structures.

2. Lev Vygotsky's View:
In contrast, Vygotsky viewed this self-talk as "private speech." According to his sociocultural theory, language is an essential tool for thought. Vygotsky argued that private speech is a crucial transition mechanism from social interaction to internal thought (inner speech) and is highly effective in self-regulation, helping children plan, guide, and monitor their behavior and problem-solving processes.

Conclusion:
Filling in the blanks according to their respective theories:
Jean Piaget perceives egocentric speech to be a sign of cognitive immaturity. Lev Vygotsky believes private speech to be effective in self-regulation.