The missing letter effect is the tendency for readers who are asked to consciously watch for a target letter while reading ordinary text to miss it more often when it appears in common function words, such as the letter h in the, than when it appears in less frequent content words. Researchers measure the effect using letter-detection tasks in which readers circle a specified letter as they read through a passage. The pattern suggests that common function words are processed more automatically and receive less conscious attention during reading than meaningful content words such as nouns and verbs.
Facts
Partially Attested
First Described YearWikipedia's references list gives this 1976 paper as the earliest cited study establishing the effect; the article body does not itself state a year for who first described it. Core ClaimReaders asked to watch for a target letter while reading ordinary text miss it more often in frequent function words than in less frequent content words. 1 Classification
Type of Phenomenon Sources
1. Missing letter effect, Wikipedia
Introduction
people are asked to consciously detect target letters while reading text, they miss more letters in frequent function words (e.g. the letter "h" in "the") than in less frequent, content words.
References
Healy, A. F. (1976-05-01). 'Detection errors on the word the: evidence for reading units larger than letters.'
lead section, phenomenon-kind classification
In cognitive psychology, the missing letter effect refers to the finding that, when people are asked to consciously detect target letters while reading text, they miss more letters in frequent function words (e.
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