Play in Rats: Association across Contexts and Types, and Analysis of Structure

Play has been proposed as a promising indicator of positive animal welfare. We aimed to study play in rats across contexts (conspecific/heterospecific) and types (social: pinning, being pinned; solitary: scampering), and we investigated its structure using behavioral sequence analysis. Group-housed (three per cage) adolescent male Lister Hooded rats (n = 21) were subjected to a […]

Human laughter, social play, and play vocalizations of non-human primates: an evolutionary approach

It has been hypothesized that the evolutionary origin of human laughter lies in the facial play signals of non-human primates. Recent studies dealing with human laughter have stressed the importance of the acoustic component of this nonverbal behaviour. In this study, we analysed the occurrence and some acoustic parameters, such as interval durations and fundamental […]