Which type of speech does Vygotsky classify as the internal dialogue used for thinking?

Vygotsky classifies the internal dialogue used for thinking as inner speech. This concept refers to the way individuals process their thoughts internally, allowing them to reflect, problem-solve, and articulate their reasoning without the need for external expression. Inner speech is a critical aspect of cognitive development, as it facilitates self-regulation and higher-order thinking.

In contrast, outer speech is the verbal communication directed towards others, while social speech encompasses the communication with others that conveys meaning in a social context. Private speech, on the other hand, is often observed in children as they talk to themselves while engaging in tasks, acting as a transitional phase from social interactions to internal dialogue. Inner speech represents the culmination of these processes, functioning as the primary tool for abstract thought and cognitive functioning in adults.