A linguistic and cognitive persepctive on retardation

Area of Science:

• Developmental Psychology
• Linguistics
• Cognitive Science

Background:

• Theories of critical periods in development are essential for understanding typical and atypical trajectories.
• Existing models often do not fully integrate language and cognitive development in relation to intellectual disabilities.

Purpose of the Study:

• To review critical readiness periods for language and cognitive development.
• To relate these periods to mental subnormalities (intellectual disabilities).
• To present a synthesized theory of language and cognition and a model for understanding intellectual disability.

Main Methods:

• Literature review of critical readiness periods.
• Theoretical model construction of language and cognition.
• Development of a "Basal Person" concept.

Main Results:

• The "Basal Person" model represents the lowest normal level of cognitive and linguistic development.
• Intellectual disability can be conceptualized as developmental impedance during critical readiness periods.

Conclusions:

• A synthesized theory of language and cognition offers a new perspective on intellectual disability.
• Defining intellectual disability through disruptions in critical developmental periods provides a novel framework.