ERIC Number: ED097123
Record Type: Non-Journal
Publication Date: 1974
Reference Count: N/A
A Methodological Review of Developmental Studies of Identity Conservation and Equivalence Conservation.
Brainerd, Charles J.; Hooper, Frank H.
This report reviews some ostensibly conflicting empirical findings which have been reported in conjunction with Elkind's (1967) conjecture that Piaget's conservation problems tap two distinct concepts. The discrepant findings which report on the order of emergence of identity conservation and equivalence conservation are discussed. An analysis of the procedural details of the conflicting studies reveal that the discrepant findings are probably the results of a measurement error (judgements-plus-explanations response criteria) and a sampling error (older subject samples), routinely committed in studies reporting that identity and equivalence emerge in no fixed order. Some new data from an experiment in which these two errors were controlled provide support for this conclusion. The general consequences of measurement and sampling errors for concept development studies are discussed. (Author/CS)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: N/A