Abstract-Coding can contribute to robot design by suggesting behavioural benchmarks. These, however, depend on the level of analysis. In illustration, semi-formalised rules are used to investigate child-robot encounters. By using behaviour-level codes, we extract information about how children use the robot. This leads to findings about longditudinal changes in how children evaluate its behaviours. Children, we find, use the robot as a social mediator-to prompt synchronized social events. By focusing on a behavioural level, coding can benefit designers of robots, software and sensors.