Sharing Positive Affective States Amongst Rodents

Prosocial behaviors in rodents

Prosocial behaviors (i.e., actions that benefit others) are central for social interactions in humans and other animals, by fostering social bonding and cohesion. To study prosociality in rodents, scientists have developed behavioral paradigms where animals can display actions that benefit conspecifics in distress or need. These paradigms have provided insights into the role of social interactions and transfer of emotional states in the expression of prosociality, and increased knowledge of its neural bases. However, prosociality levels are variable: not all tested animals are prosocial. Such variation has been linked to differences in animals' ability to process another's state as well as to contextual factors. Moreover, evidence suggests that prosocial behaviors involve the orchestrated activity of multiple brain regions and neuromodulators. This review aims to synthesize findings across paradigms both at the level of behavior and neural mechanisms. Growing evidence confirms that these processes can be studied in rodents, and intense research in the past years is rapidly advancing our knowledge. We discuss a strong bias in the field towards the study of these processes in negative valence contexts (e.g., pain, fear, stress), which should be taken as an opportunity to open new venues for future research.

The Future of Affective Science: Introduction to the Special Issue

Modern affective science-the empirical study of emotional responding and affective experience-has been active for a half-century. The Future of Affective Science special issue considers the history of this field and proposes new directions for the decades ahead. Contributors represent diverse theoretical perspectives, methodological expertise, and domains of study, and the special issue includes both literature reviews and new empirical studies as illustrations. This introductory article synthesizes the contributions, articulating the broader context of the current status of our field and highlighting common themes across articles as well as gaps notable even in this special issue. Sections of the article address theoretical and conceptual issues, research methodology, the questions we ask, and translation of basic affective science to applied domains. We conclude that much has been learned from the first 50 years of affective science, and it is now time for new theories, new research questions, and innovative methods for the decades ahead.