摘要
本研究将影响概念难度的众多因素概括为特征的显著性和特征频度这两个基本因素,即:关键特征越显著,概念越容易形成;关键特征在正例上出现的频度越高,概念越容易形成;无关特征显著性较强或频度较高时,就将干扰正确概念的形成。本研究还发现了一个较奇异的现象:至少在特征数较少的情况下,关键特征数的增减对概念难度不起作用。
On the basis of the improved materials,many factors affecting the concept difficultywere generalized as the following two fun-damental factors:attribute saliency (AS) andattribute frequency (AF).The more salientthe relevant attribute,or the more fre-quent it appears in the positive examples,theeasier the concept,and vice versa.Whenthe AS or AF of an irrelevant attribute isgreater,it will disturb the correct conceptformation.In addition,a somewhat strangeresult was noticed that at least when thereare only 2—3 relevant attributes,the numberof AS does not affect the concept difficul-ty.
出处
《心理科学》
CSSCI
CSCD
北大核心
1992年第6期8-12,共5页
Journal of Psychological Science
基金
国家自然科学基金
