The Perception and Activity Understanding group (Jean-Marc Odobez, www.idiap.ch/~odobez/) seeks one highly motivated PhD candidate to work within the AI4Autism project aiming at improving the digital phenotyping of children with Autistic Spectrum Disorders (ASD). The PhD candidate will work on the multimodal perception of small children involved in free play activities as well as their social interactions with adults. In particular, he will investigate deep learning methods and models for the recognition of gestures and visual attention events, including the modeling of their coordination, from visual data and IoT sensors. Experiments will be conducted on various project data (e.g. data coming from standard ADOS evaluation protocol of more than 300 toddlers with partial behavior annotations) as well as standard datasets from the computer vision and multimodal domains (for gesture recognition, attention).