In this chapter, we first introduce the questions of when and how children start using connectives and discourse relations during their first years of life. We will see more specifically that mastering the complex form-function mappings involved in the understanding of many connectives is a complex task for young children. In addition, we will present research investigating school-age children’s comprehension of connectives, and show that it is only around the end of their primary school years that they fully understand frequent connectives. We will explore the causes of these difficulties, and discuss the differences between various connectives and discourse relations. We will then move on to other studies analyzing the way older children understand connectives, and see that their acquisition is not fully in place after primary school years, as teenagers keep developing their competence with connectives. Finally, we will briefly discuss the acquisition of connectives and discourse relations by children suffering from linguistic or cognitive impairments such as SLI and autism.

In this chapter, we discuss the way people read, remember and understand discourse, depending on the type of relations that link discourse segments together. We also illustrate the role of connectives and other discourse signals as elements guiding readers’ interpretation. Throughout the chapter, we review empirical evidence from experiments that involve various methodologies such as offline comprehension tasks, self-paced reading, eye-tracking and event related potentials. One of the major findings is that not all relations are processed and remembered in the same way. It seems that causal relations play a special role for creating coherence in discourse, as they are processed more quickly and remembered better. Conversely, because they are highly expected, causal relations benefit less from the presence of connectives compared to discontinuous relations like concession and confirmation. Finally, research shows that in their native language, speakers are able to take advantage of all sorts of connectives for discourse processing, even those restricted to the written mode, and those that are ambiguous.

In this chapter, we present an overview of current knowledge about learners’ use and understanding of connectives. In the first part of the chapter, we will see that connectives are notoriously difficult to master for second language learners, because they require an array of complex competences. Learners must know how to use them appropriately in various genres and registers, have a fine-grained understanding of the meaning differences between connectives used to convey similar coherence relations, and also automatize this knowledge so that it is activated automatically during discourse processing, and not only when they consciously elicit usage rules. In the second part of the chapter, we review the important body of studies that have empirically assessed the causes for learners’ difficulties with connectives, and conclude with some recommendations for teaching. We conclude that research on the second language acquisition of connectives contributes to answering important questions, such as what makes connectives difficult to master, and how they are they used across languages.