The present study aims to explore dimensions of monolingual and bilingual emotionality and

deception via a psycholinguistic, multimodal approach, by assessing the verbal and non-verbal

performance of speakers of Dutch, German and English. We aim to determine the similarities and/or

differences in language and behaviour in emotional and deceptive contexts of communication. A set

of studies will scrutinise the behaviour of monolinguals and bilinguals when engaging in emotional v.

non-emotional and deceptive v. non-deceptive conversations across their native language (L1), and

for bilinguals also their second language (L2). We will assess verbal language via investigations of

vocabulary, linguistic profile, syntactic complexity, as well as acoustic variables. In addition to that,

emotional responses shall be captured via measures of galvanic skin responses, eye tracking, and

electrophysiological signals. Further, we will investigate co-speech hand gestures and bodily

movements. The resulting linguistic and behavioural profiles will inform us whether bilinguals exhibit

similar or distinct characteristics from monolinguals in emotional situations and during deception. It

will also reveal possible differences between bilinguals' verbal and non-verbal behaviour in their L2

as opposed to their L1.