Our latest findings show that deaf and hard-of-hearing (DHH) adolescents report less cognitive empathy and show a lower motivation to behave prosocially than their hearing peers. A possible explanation for this lies in their diminished ability to learn about social interactions by overhearing others. This was analysed with the EmQue-CA, the Empathy Questionnaire for children and adolescents developed by our team. This project has come to a successful conclusion thanks to the unique collaboration between our lab at Leiden University, the University Hospital (LUMC) and the NSDSK. The paper is accepted for publication in PLOS ONE.