Research into recurrent, highly conventionalized “formulaic” sequences has shown a processing advantage compared to “novel” (non-formulaic) language. Studies of individual types of formulaic sequence often acknowledge the contribution of specific factors, but little work exists to compare the processing of different types of phrases with fundamentally different properties. We use eye-tracking to compare the processing of three types of formulaic phrases—idioms, binomials, and collocations—and consider whether overall frequency can explain the advantage for all three, relative to control phrases. Results show an advantage, as evidenced through shorter reading times, for all three types. While overall phrase frequency contributes much of the processing advantage, different types of phrase do show additional effects according to the specific properties that are relevant to each type: frequency, familiarity, and decomposability for idioms; predictability and semantic association for binomials; and mutual information for collocations. We discuss how the results contribute to our understanding of the representation and processing of multiword lexical units more broadly.

Native speakers understand familiar idioms (e.g., over the moon) and conventional metaphors (e.g., describing time as a doctor) quickly and easily. In two eye-tracking studies we considered how native speakers are able to make sense of fundamentally unfamiliar figurative expressions. In Experiment 1 compared with literal paraphrases of the same meaning, known idioms had a clear advantage, unknown idioms showed a significant disadvantage, and conventional metaphors showed no difference between figurative and literal versions. In Experiment 2 readers saw known and unknown idioms (or paraphrases) in contexts that either supported the intended meaning or were neutral. Strength of context had minimal effect on reading patterns for either idiom type and had no effect when readers were asked to subsequently identify the meaning. Context may be helpful in terms of sense selection but not when new senses need to be generated, at which point aspects such as transparency become more important.

Little is known about how nonnative speakers process novel language patterns in the input they encounter. The present study examines whether nonnatives develop a sensitivity to novel binomials and their ordering preference from context. Thirty-nine nonnative speakers of English (L1 Arabic) read three short stories seeded with existing binomials (black and white) and novel ones (bags and coats) while their eye movements were monitored. The existing binomials appeared once in their forward (conventional) form and once in their reversed form. The novel binomials appeared in their experimentally defined forward form in different frequency conditions (two vs. four encounters) and once in the reversed form. Results showed no advantage for existing binomials over their reversed forms. For the novel binomials, the nonnative speakers read subsequent encounters significantly faster than initial ones for both frequency conditions. More importantly, the final reversed form also led to faster reading, suggesting that L2 speakers process the reversed form of a novel binomial as another encounter, ignoring the established order.

Idioms, along with other formulaic multiword phrases, represent a substantial part of vocabulary knowledge. This study investigates how idiom knowledge develops through the adult lifespan, comparing familiarity and transparency ratings for a large set of common English idioms. A total of 237 participants, ranging from 18 to 77 years old, collectively rated 200 idioms. They also completed a short single-word vocabulary test and provided information about their educational background. Results showed a clear increase in idiom and single-word knowledge throughout the lifespan. For idioms, this represented a jump from the youngest age-group, then a steady increase from the age of around 25 onward. Single word vocabulary knowledge increased more evenly as a function of age. Perceptions of transparency were not affected in the same way. I discuss what these results suggest about the development of vocabulary through the lifespan.

Language users routinely use canonical, familiar idioms in everyday communication without difficulty. However, creativity in idiom use is more widespread than sometimes assumed, and little is known about how we process creative uses of idioms, and how individual differences in cognitive skills contribute to this. We used eye-tracking while reading and cross-modal priming to investigate the processing of idioms (e.g., play with fire) compared with creative variants (play with acid) and literal controls (play with toys), amongst a group of 47 university-level native speakers of English. We also conducted a series of tests to measure cognitive abilities (working memory capacity, inhibitory control, and processing speed). Eye-tracking results showed that in early reading behaviour, variants were read no differently to literal phrases or idioms but showed significantly longer overall reading times, with more rereading required compared with other conditions. Idiom variables (familiarity, decomposability, literal plausibility) and individual cognitive variables had limited effects throughout, although more decomposable phrases of all kinds required less overall reading time. Cross-modal priming—which has often shown a robust idiom advantage in past studies—demonstrated no difference between conditions, but decomposability again led to faster processing. Overall, results suggest that variants were treated more like literal phrases than novel metaphors, with subsequent effort required to make sense of these in the way that was consistent with the context provided.

An eye-tracking while listening study based on the blank screen paradigm was conducted to investigate the processing of literal and metaphorical verbs of motion. The study was based on two assumptions from the literature: that language comprehension by default engages mental simulation, and that looking behavior (measured through patterns of eye movements) can provide a window into ongoing cognitive processes. This study specifically compared the comprehension of sentences that depicted actual physical motion (the curtain is rising) and sentences that described changes in quantity or emotional states in terms of vertical motion (prices are rising). Results showed that eye movements were selectively biased upward or downward in accordance with the direction implied by the verb, regardless of the context (literal or metaphorical) in which they appeared, and in the absence of any visual stimuli or explicit task. Thus, these findings suggest that literal and metaphorical language drive spontaneous, direction-specific mental simulations captured by eye movements and that at least in the case of verbs presented in the present progressive, which emphasizes the ongoing nature of actions, visual biases along the vertical axis may start during the verb itself.