Participants

A total of 24 children (aged between 35 and 42 months, M = 37.29 m) and 24 adults (aged between 18 and 26 years, M = 22.33y; 17F and 7M) participated in the experiment. All participants came from families where German was the main language in use and lived in a German environment, although four children and three adults were bilingual and spoke a second language. The data from six children were not included in the final sample due to technical issues with data acquisition (1), noisy data (4) and the child not completing at least 50% of the experiment (1), leaving the data from 18 children for final analysis (8F and 10M). Children came from a sample of families who responded to an invitation letter sent to all families living with infants of appropriate age in the area. Adults were University students who received credits for participating in the experiment. The children were healthy, full-term infants without any pre- or perinatal complications. Adult and child participants had normal or corrected vision and no hearing problems. Parents gave informed consent for participation of their child in the study, while adult participants gave written consent before beginning the experiment and the researchers involved in the project ensured that the research was conducted in accordance with ethical guidelines of the Helsinki protocol.