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Understanding insincere language (sarcasm and teasing) is a fundamental part of communication and crucial for maintaining social relationships. This can be a challenging task for cochlear implant (CIs) users who receive degraded suprasegmental information important for perceiving a speaker’s attitude. We measured the perception of speaker sincerity (literal positive, literal negative, sarcasm, and teasing) in 16 adults with CIs using an established video inventory. Participants were presented with audio-only and audio-visual social interactions between two people with and without supporting verbal context. They were instructed to describe the content of the conversation and answer whether the speakers meant what they said. Results showed that subjects could not always identify speaker sincerity, even when the content of the conversation was perfectly understood. This deficit was greater for perceiving insincere relative to sincere utterances. Performance improved when additional visual cues or verbal context cues were provided. Subjects who were better at perceiving the content of the interactions in the audio-only condition benefited more from having additional visual cues for judging the speaker’s sincerity, suggesting that the two modalities compete for cognitive recourses. Perception of content also did not correlate with perception of speaker sincerity, suggesting that what was said vs. how it was said were perceived using unrelated segmental versus suprasegmental cues. Our results further showed that subjects who had access to lower-order resolved harmonic information provided by hearing aids in the contralateral ear identified speaker sincerity better than those who used implants alone. These results suggest that measuring speech recognition alone in CI users does not fully describe the outcome. Our findings stress the importance of measuring social communication functions in people with CIs.

Besides motor symptoms, people with Parkinson’s Disease (PD) often exhibit social cognition difficulties. The assessment of social cognition in early PD is crucial, as these deficits may impact patients' social interactions and quality of life. The current study used naturalistic, dynamic video clips to examine the ability of individuals with idiopathic PD to perceive speaker intentions in comparison with healthy controls (HC). Neuropsychological evaluation of the PD patients was conducted using the Cognitive Linguistic Quick Test (CLQT). Video stimuli were taken from the Relational Inference in Social Communication database (RISC; Rothermich & Pell, 2015) and contained literal, sarcastic, and teasing scenes. The participant’s task was to identify the speaker’s belief, i.e., if they were sincere or insincere. The results show that in general, all participants had a harder time identifying nonliteral statements such as teasing as insincere when compared to literal statements. A group analysis demonstrated a marginally significant effect between people with PD and HCs, showing that individuals with PD were less accurate in recognizing social intent compared to HC. This difference was possibly driven by changes in cognitive abilities due to the progression of PD. Indeed, analyses for the PD group revealed positive correlations between several cognitive domains, such as attention and memory, and performance on the speaker belief task. Taken together, our study sheds light on the relationship between cognitive mechanisms and social perception impairments in PD and supports the development of targeted tools for diagnosing and treating these impairments.