Ontology highlight
ABSTRACT:
SUBMITTER: Lewis M
PROVIDER: S-EPMC4602370 | biostudies-other | 2015 Nov
REPOSITORIES: biostudies-other

Developmental psychology 20150921 11
In 2 separate longitudinal studies, infants and their mothers were seen in 3 longitudinal visits. At 2 months, they were observed in free play where mothers' contingency toward their infants was obtained. At 5 months, a goal blockage response was produced when a previously learned contingent response became ineffective in producing an interesting event. Infants' emotional responses, in particular anger and sad facial expressions, were observed. At 2 years, toddlers' persistence at play was asses ...[more]