A Study by Means of Analysis of Structure of Covariunce, on Factors which Affect Japanese Language Acquisition and Mother Tongue Maintenance of Children from Overseas-an Integral Study of Cognitive Linguistic / Affective / Socio Cultural Factors-

本研究基于有机整体范式。这一范式的目的是将语言习得研究、语言维持研究和双语研究有机地整合在一起，并对这三个学科领域有一个整体的理解。这种范式认为语言发展是一个有机的整体，通过语言习得和语言维持的相互作用而发展。基于此，本研究采用了将语言习得、语言维持和语际关系作为一个有机整体的分析范式（L’ami范式）。以往的研究分别研究了影响获取和维持的因素。本研究显示了特定因素对这三种语言发展的影响：例如，当父母具有积极维护母语和母语文化的态度，并且孩子的母语熟练程度已经越过临界点时，父母态度的以下几种影响是明显的：1 .母语和第二语言之间实现了相互依存。2. 虽然态度侧重于母语维护，但二语习得也不错。3. L1维护良好。4. 为了实现上面列出的效果，必须清除L1级中的一个临界点。

The present study is based on the Organic Wholeness Paradigm. The aim of this paradigm is organic integration of studies in language acquisition, studies in language maintenance, and studies in bilingualism, as well as a holistic understanding of these three disciplinary areas. This paradigm sees language development as an organic whole which grows through interactions between language acquisition and language maintenance. Based on this, this study adopts a paradigm of analysis that integrates language acquisition, maintenance and interlingual relationship as an organic whole (L'AMI paradigm).Previous studies have investigated factors influencing acquisition and maintenance separately. The present study has shown tile influence of specific factors on all three kinds of language development : e. g. When parents have an attitude of active maintenance of the mother tongue (L1) and culture, and the child's Ll proficiency level has cleared the critical point, the following kinds of effects from the parental attitude are evident : l. Interdependence is realized between Ll and L2. 2. Although the attitude focuses on L1 maintenance, L2 acquisition is also good. 3. L1 maintenance is good. 4. In order for the effects above listed to be realized, a critical point in L1 level must be cleared.