Language, thought and communication — Edexcel GCSE Psychology

Piaget (1950) argued that representational thinking precedes language; children must understand a concept before using the word for it (e.g. grasping object permanence before saying 'gone'). Language reflects cognitive development. Conversely, Vygotsky (1981) proposed that language and thinking develop separately but merge around age two. He identified pre-linguistic thought (thinking without language, like solving a puzzle) and pre-intellectual language (using words without understanding meaning, like mimicking). Piaget's theory aligns with developmental stages but underestimates social influences. Vygotsky highlights social interaction but may overemphasise language's role in thought. Both theories offer distinct views on cognition.

Linguistic determinism (the strong version of the Sapir-Whorf hypothesis) argues that language entirely dictates how we think and perceive the world; if a language lacks a word for a concept, its speakers cannot think about it. A strength is its clear, testable prediction, but a major weakness is that translation between languages is possible, and people can understand concepts before learning the words for them. Linguistic relativism (the weak version) suggests language merely influences thought and worldview, making certain ways of thinking easier. This is supported by studies on colour perception across cultures, showing language affects recall speed. However, a weakness is the difficulty in separating language from cultural influences, making cause and effect hard to establish.

Human and animal communication share similarities, such as using signals for survival, mating, and territory. However, human language is vastly more complex. Aitchison (1983) identified key criteria distinguishing human language: semanticity (using symbols to mean specific things), displacement (communicating about things not physically present, like the past or future), structure dependence (using grammar), and creativity (producing infinite novel sentences). While animals like bees show limited displacement when communicating food location, they lack creativity and structure dependence. A key difference is that animal communication is largely innate and closed, whereas human language is learned, open-ended, and highly flexible.

Non-verbal communication conveys messages without words. Facial expressions, like smiling, communicate emotions. Eye contact regulates conversation flow and signals interest. Body language includes postures (how the whole body is held, such as an open stance) and gestures (movements of hands or arms, like pointing). Personal space refers to the physical distance kept from others. Proxemics is the study of this space, which varies based on relationships. Cultural differences significantly impact non-verbal communication; acceptable personal space or the meaning of specific gestures varies widely between cultures, leading to misunderstandings if not recognised.

Charles Darwin’s (1872) theory explains non-verbal communication as an adaptive trait promoting survival. Darwin proposed that facial expressions and body language are innate and universal, rather than learned. He introduced serviceable associated habits, suggesting behaviours that originally served a practical physical function, like baring teeth to prepare for a bite or widening eyes in fear, became communicative signals over generations. Because these non-verbal signals helped ancestors survive by warning of danger or signalling submission, they were passed down genetically. This biological explanation contrasts with theories suggesting non-verbal communication is culturally learned.