Trigram

A sequence of three consecutive words used in statistical language modeling for word prediction. Trigram models predict the next word based on the two preceding words, capturing more context than simpler unigram (single word) or bigram (two word) models. In AAC word prediction, trigram models with backoff—falling back to bigrams or unigrams when the specific trigram has not been observed—provide significantly better prediction quality than recency-based systems, leading to higher user trust and utilization.