摘要：The purpose of this study was to find out conservation concept acquisition in children of pre-operational and concrete periods. The data in this study were obtained through experimental methods with 62 children(28 males and 34 females) of 3-11 ages in Korean rural areas. The Piagetian instruments devised by Gelman were used for the study;length,liquid,quantity,mass,and volume conservation tasks. Percentile and χ²-test were applied for the statistical analysis of data: and the results of the experiment are as follows: 1) Most children aged 3-9 years did not appear to understand that the length of sticks stayed the same regardless of position. 2) In liquid quantity conservation,children centered their attentions on one aspect;juice level or number of container. Their conservation concept was developed correlating with ages. 3) In the experiment of mass conservation by using play dough,only 7.1％ of children of pre-operational period and 47.1％ of concrete period affirmed that the amounts of play dough were same after changed shape. 4) In volume task,29.4％ children aged 7 to 11 years admitted to conservation. 5) It is found that girls acquired length conservation earlier than boys,while there was no significant difference between boys and girls in other conservation tasks..
