This study explored possible impairments in the comprehension of nominal metaphors in five aphasic patients with semantic deficits and two with difficulties in lexical access. To this end, a set of four novel tasks was designed: two oral paraphrasing and two forced-choice tasks. The results support the claims of the Class-Inclusion Model and the Graded Salience Hypothesis, and showed that difficulties in the comprehension of these types of expressions are sensitive to certain features of metaphor vehicles, especially their ambiguity, level of conventionality and degree of semantic opacity. Similarly, they confirmed that metaphors understood as categorization statements require the undamaged processing of low-imageability words, as opposed to analogical metaphors, which comply with the assumptions of the Structural Mapping Model. Generally, patients with lexical impairments do not show difficulties in the processing of metaphorical expressions, while the performance of patients with semantic deficit is affected in accordance with their inability to understand abstract and low-frequency words.

This introduction presents the studies that make up volume 42, issue 2, of the journal Studies in Psychology. The first part comprises studies from the fields of psycholinguistics and cognitive neuropsychology of language. They address the processing of highly creative metaphors, comprehension of idioms in English–Spanish bilinguals, impairments in the processing of metaphors and idioms in people with aphasia and dementia, and, finally, a critical look at various accounts of the ‘literalist bias’ in the Autism Spectrum Disorder. The second part contains articles dealing with the main assumptions of the so-called conventional figurative language theory, the linguistic expression of aesthetic emotions, the use of subversive humour to vindicate the role of women in present-day society and, to conclude, an ontogenetic perspective on the emergence of humour in school-aged children.

This work analysed the comprehension of three types of idioms of the V+NP form (e.g., bite the dust) in seven patients with aphasia and two patients with probable Alzheimer’s disease, frontal variant. The aphasic patients included in the study had a severe semantic disorder or a mild semantic deficit, or only a lexical disturbance. Participants with dementia showed a moderate deterioration in their executive functions and no impairment in their psycholinguistic performance. In this study, we used an idiom–word matching task, administered in two versions. The results indicate dissimilar performance patterns, according to patients’ neuropsychological impairment. In particular, patients with a severe semantic disorder showed a poor understanding of the figurative meanings of idioms, especially if those idioms were not fully transparent or opaque. Participants with a mild semantic deficit accessed the non-literal meanings of the idioms showing less difficulty in the case of certain idiomatic expressions. Patients with executive function deficit showed a double interference effect, and although they could activate the figurative and literal meanings of idioms according to the context in which they were presented, it was difficult for them to inhibit those meanings whenever necessary and activate the alternative meaning. This effect was more pronounced the less transparent the idiom was.