The QWERTY effect is a proposed psycholinguistic phenomenon in which the location of letters on a QWERTY keyboard is statistically associated with the perceived emotional meaning, or valence, of the words containing those letters. In its original formulation, words containing relatively more letters typed on the right side of the keyboard tended to receive slightly more positive ratings than words containing relatively more left-side letters. The effect has been studied using word-rating experiments, invented words, personal names, online reviews and consumer ratings. Although several studies have reported evidence supporting it, other analyses have found little or no effect. The QWERTY effect is therefore generally treated as a small and disputed statistical tendency rather than proof that keyboards directly determine the meanings of words.
Measurement Most studies divide the alphabet according to the side of a standard QWERTY keyboard on which each key appears. The left-side letters are:
Q, W, E, R, T, A, S, D, F, G, Z, X, C, V and B. The right-side letters are:
Y, U, I, O, P, H, J, K, L, N and M. A commonly used measurement is the right-side advantage, calculated by subtracting the number of left-side letters in a word from the number of right-side letters:
R S A = R − L {\displaystyle RSA=R-L}
For example, the word milk contains four right-side letters and therefore has a right-side advantage of +4. The word tree contains four left-side letters and has a score of −4. These scores only describe the positions of the letters and do not, by themselves, demonstrate that one word is perceived more positively than another. Other researchers have used the proportion of a word's letters found on the right side of the keyboard:
R S R = R R + L {\displaystyle RSR={\frac {R}{R+L}}}
This measurement, sometimes called the right-side ratio, accounts for differences in word length.
Proposed explanations Researchers have connected the QWERTY effect to embodied cognition, the theory that physical experiences can influence abstract thought. Typing a word is a physical action, and repeated experiences with that action could become associated with how the word is evaluated. One proposed explanation is processing fluency. Actions that are easier or more comfortable to perform are sometimes evaluated more positively than actions that require greater effort. According to this explanation, differences in the ease, speed or familiarity of typing particular letter combinations could influence judgments of the resulting words. Another explanation involves learned associations between physical space and emotional value. Because most people are right-handed, researchers initially considered whether the right side might have stronger positive associations for right-handed typists. However, later experiments found similar right-side preferences among right-handed and left-handed participants, making a simple dominant-hand explanation insufficient. The exact mechanism remains uncertain. Keyboard position, typing experience, letter frequency, word length and the combinations of fingers used to type a word may all contribute to the reported associations.
Research
Initial word-valence experiments The term was introduced by researchers Kyle Jasmin and Daniel Casasanto in a 2012 study. They examined emotional-valence ratings for words in English, Spanish and Dutch. Across the combined datasets, words with a greater right-side advantage tended to receive more positive ratings. The relationship was statistically significant in the English and Dutch datasets, while the Spanish results followed the same general direction but were not independently significant. The researchers also examined English words that entered common use after the development and widespread adoption of QWERTY typing. They reported that the association between keyboard side and emotional valence was stronger among these newer words than among older words. This was interpreted as possible evidence that typing experience could influence how words develop or are selected, although the analysis was correlational and could not establish causation. In another experiment, approximately 800 English-speaking participants rated invented letter sequences that followed English spelling patterns. Because the items were not existing words with established dictionary meanings, the experiment was intended to reduce the influence of previously learned definitions. Participants gave slightly more positive ratings to invented words containing more right-side letters.
Later studies A 2014 series of experiments reported similar associations in larger English-language datasets and in German words typed using the closely related QWERTZ layout. An analysis of Portuguese words produced a smaller result that became marginal after controls were added, although the combined evidence across the languages examined was statistically significant. The same researchers asked participants to rate individual letters rather than complete words. Letters located farther to the right of the keyboard received somewhat more positive ratings. This pattern appeared among both right-handed and left-handed participants. A 2022 study by Erin Buchanan, K. D. Valentine and Addie Wilkowsky reported a replication of the association in an additional word-valence dataset. The researchers also found that typing expertise and a word's typeability—including how efficiently its letters could be entered and whether typing alternated between hands—helped predict participants' ratings. Their results suggested that the effect may involve the overall physical fluency of typing rather than keyboard side alone.
Online ratings and writing David Garcia and Markus Strohmaier tested the QWERTY effect using 15 online datasets. Their study distinguished between two possible forms of the effect:
… excerpt ends here. Continue reading the full article.
