Analysis of the Corpus of Contemporary American English found thought most frequent overall, idea prominent in blogs and TV/movie subtitles, and notion strongly associated with academic writing. Top verb and adjective collocates revealed overlap but also proposal-oriented idea, temporal or clarity-related thought, and accepted or distributive notion. The pedagogical message is to teach genre and collocation rather than one-word equivalence.
Key findings
- All three shared themes such as negative sense, uncertainty and conceptual meaning. Idea clustered with proposal contexts, thought with temporal and clarity meanings, and notion with accepted and distributive academic meanings. Teaching examples include reject an idea, share a thought and support a notion.
Why this matters globally
The findings can inform learner dictionaries, corpus-based exercises and register-aware writing feedback, provided query lists and corpus periods are documented for reproducibility.
Thai researcher contribution
Thayakorn Klomkaew of Kamphaeng Phet Rajabhat University is the corresponding author, demonstrating a Thai corpus-linguistics contribution applicable to EFL learners internationally.
Limitations to consider
COCA represents American English and its own genre composition, not all Englishes. MI can elevate rare specialised pairs, semantic grouping remains interpretive, and no learner intervention tested educational gains.