Language
Language development
Learning a language can feel challenging - especially for adults learning a second language - while children often pick up language with little apparent effort. Psychologists have proposed several explanations for how this happens.
B.F. Skinner’s (1957) behaviorist approach explains language development through learning principles such as practice and reinforcement. In this view, language proficiency depends on using language and receiving feedback (for example, being rewarded or corrected), even when you’re learning your first language.
In contrast, Noam Chomsky’s (1965) nativist theory argues that language acquisition is largely biologically based. Children develop language without formal instruction, which suggests an inborn capacity to learn language. This perspective also proposes a universal grammar shared across societies: a built-in set of basic grammatical structures (such as nouns and verbs) that helps children organize language. Even so, native speakers are usually unable to explain the rules they follow; they can use the language correctly without being able to state why it works that way.
Research also suggests that language learning is most effective during a critical period in early childhood. After this period, mastering new languages tends to become more difficult. From birth, infants show preferences for their mother’s voice and can distinguish between familiar and unfamiliar languages. By about age five, children typically reach substantial fluency in their native language.
The social interventionist approach takes a more integrative view, arguing that both inborn predispositions and environmental interaction matter. In this model, learners benefit from guidance and modeling by more skilled language users - an idea that is especially relevant for second-language learning. From a social-cognitive perspective, a supportive social network can substantially strengthen a child’s language development.
Stages of language acquisition
| Stage | Age | Developmental language and communication |
|---|---|---|
| 1 | 0-3 months | Reflexive communication |
| 3-8 | 3-8 months | Reflexive communication; interest in others |
| 3 | 8-13 months | Intentional communication; sociability |
| 4 | 12-18 months | First words |
| 5 | 18-24 months | Simple sentences of two words |
| 6 | 2-3 years | Sentences of three or more words |
| 7 | 3-5 years | Complex sentence; has conversations |
Table adapted from OpenStax
Influence of language on cognition
Language is a tool for communicating ideas - through speech, writing, or nonverbal signals. It’s closely tied to thinking: our thoughts shape the language we use, and language can also shape how we organize and work with ideas. Often, you learn new words and develop new concepts through communication with other people.
Psychologists have long debated the direction of this relationship. Does language determine how people think, or do our mental concepts shape how we speak? Edward Sapir and Benjamin Lee Whorf argued that language strongly governs thought, a position often called linguistic determinism. In this view, the vocabulary and structure of a language can limit or guide how people interpret experiences. A common example compares the single English word “love” with other languages that use multiple, more specific words for different kinds of love. Critics argue that this claim is too strict and not strongly supported by empirical evidence.
Even if language doesn’t rigidly determine thought, it may still influence cognitive processing. For example, English speakers often use horizontal expressions for time (such as “running behind schedule”), while Mandarin Chinese speakers use both horizontal and vertical metaphors - describing the past as “up” and the future as “down.” In tasks that use vertical cues to judge time relationships, Mandarin speakers tend to respond faster than English speakers. This suggests that habitual language patterns can affect how efficiently people notice or process certain kinds of information.
Brain areas that control language and speech
Brain regions involved in language
Two crucial brain areas support different parts of language:
-
Broca’s area (left frontal lobe)
Role: Primarily responsible for producing language (spoken and written).
Impact of damage: A person may understand language but struggle to speak or write. For example, they might be able to complete everyday tasks like shopping but be unable to produce verbal or written responses. -
Wernicke’s area (temporal lobe near the auditory cortex)
Role: Critical for understanding speech.
Impact of damage: Speech production may remain possible, but understanding spoken or written language becomes difficult. The person’s speech may sound fluent and follow grammatical patterns, yet lack meaning. It may include incorrect substitutions of similar-sounding words, unrelated words, or reversed syllables (e.g., saying “bowl” instead of “plate” or “dog” instead of “fruit”).