{"id_concept_class": "", "creation_time": 1512660594091, "event_stamp": "2013-08-10T22:30:29", "def_id_user": "usr_51bc76ae9636c", "def_event_stamp": "2013-08-10T22:30:29", "last_updated": 1512660594091, "def_id": "def_5206bf05606b3", "name": "Piaget's Water Jar Task", "alias": "water jug task, water jug problem", "definition_text": "This task tests whether children understand the principle of conservation, or the idea that two objects are still equivalent after a transformation of one of them.  Specifically, the "Water Jar Task" tests if children have attained "conservation of liquid quantity." The child is asked to assess if the same amount of water in different glasses is in fact equal.  ", "id_user": "usr_51bc76ae9636c", "id": "trm_5206bf053acf4", "type": "task", "conditions": [], "concepts": [{"id_concept_class": "", "creation_time": 1512660628179, "event_stamp": "2009-06-22T19:12:55", "def_id_user": "usr_4b9003ea0be96", "def_event_stamp": "2011-04-29T00:24:11", "last_updated": 1512660628179, "def_id": "def_4dba052bb40d5", "name": "cognitive development", "alias": "", "definition_text": "the construction of thought processes, including remembering, problem solving, and decision-making, from childhood through adolescence to adulthood.", "id_user": "usr_0000000000", "relationship": "ASSERTS", "concept_id": "trm_4a3fd79d09d35", "contrasts": [{"id": "cnt_5206bf3813b0d", "name": "Average difference in degrees from correct answer"}]}], "indicators": [], "external_datasets": [], "implementations": [], "citation": [], "contrasts": [{"creation_time": 1512660669612, "event_stamp": "2013-08-10T22:31:20", "last_updated": 1512660669612, "name": "Average difference in degrees from correct answer", "id_user": "usr_51bc76ae9636c", "id": "cnt_5206bf3813b0d", "conditions": []}], "batteries": [], "disorders": []}