Step 1: Concept
Vygotsky's Sociocultural Theory
Step 2: Meaning
Vygotsky emphasized the role of social interaction in cognitive development. He introduced concepts like 'cultural tools' and 'private speech'. 'Cultural tools' refer to the artifacts, symbols, and practices that help individuals think and communicate effectively within a culture. 'Private speech', also known as egocentric speech, is a form of self-directed verbal thinking aloud that children use during problem-solving tasks.
Step 3: Analysis
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• A) Pavlov is known for classical conditioning (stimulus-response), not sociocultural development.
• B) Skinner developed operant conditioning, focused on reinforcement and punishment.
• C) Erikson proposed the eight stages of psychosocial development.
• D) Vygotsky's sociocultural theory specifically introduced 'cultural tools' and 'private speech' as integral concepts in cognitive development.
Step 4: Conclusion
Both 'cultural tools' and 'private speech' are integral to Vygotsky's theory of cognitive development, highlighting the importance of social interaction in shaping mental processes.
Final Answer: (D)