Individual differences in mathematical skills emerge early and are influenced by a range of cognitive and environmental factors. One of these is the Home Mathematics Environment (HME), which includes adult-child mathematics talk. Nevertheless, large variations in methods used to investigate and code adult-child mathematics talk exist. We conducted…

Joint attention (JA) is the purposeful coordination of an individual's focus of attention with that of another and begins to develop within the first year of life. Delayed, or atypically developing, JA is an early behavioural sign of many developmental disabilities and so assessing JA in infancy can improve our understanding of trajectories of…

The critical role of the second year of life in the development of empathy is well accepted by psychologists. However, the developmental trends of the different components of empathy and the potential factors underlying these components during this critical period remain unclear. Eighty-four Chinese toddlers in the second year of life participated…