概念性定义 meaning in English

conceptual definition

In this research , the author introduced in turn the conceptual definition , the operational definition , and methods of learning disabilities ( ld ) assessment in the history of america . the author especially presented two most popular definition at present , the definition by u . s . office of education ( usoe ) ( 1976 , 1977 ) , and by national joint committee on learning disabilities ( njcld ) ( 1988 )
本研究对美国历史上学习障碍的概念性定义、操作性定义和评估方法依次作了介绍，并特别介绍了美国当前最流行的两个定义：美国联邦教育部( 1976 ， 1977 )和全美学习障碍联合委员会( 1988 )的定义。