| 类规模对面向对象度量与易维护性关联关系潜在混和效果元分析 |
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| 引用本文： | 卢红敏,周毓明,徐宝文.类规模对面向对象度量与易维护性关联关系潜在混和效果元分析[J].东南大学学报,2008,24(3). |
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| 作者姓名： | 卢红敏 周毓明 徐宝文 |
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| 作者单位： | 东南大学计算机科学与工程学院,南京211189 |
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| 摘 要： | 用在设计阶段可以收集到的3个规模度量分析类规模对面向对象度量与易维护性之间关联关系的混和效果.为得到尽可能通用的结论,在127个C＋＋系统和113个Java系统上分析类规模的混和效果.首先,对每个面向对象度量,在单个系统上计算代表由类规模造成的关联扭曲的间接效果和它的方差.然后,利用统计的元分析方法计算这些系统上的平均间接效果并判断它是否显著地区别于零.实验结果表明,不论使用哪个类规模度量进行分析,类规模对面向对象度量与易维护性之间关联关系的混和效果通常是存在的.因此,验证面向对象度量与易维护性之间关系的实验研究应将类规模视为一个混和变量.
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| 关 键 词： | 面向对象 度量 验证 类规模 混和 易维护性 |
Meta-analysis of potentially confounding effect of class size on associations between object-oriented metrics and maintainability |
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| Lu Hongmin,Zhou Yuming,Xu Baowen.Meta-analysis of potentially confounding effect of class size on associations between object-oriented metrics and maintainability[J].Journal of Southeast University(English Edition),2008,24(3). |
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| Authors: | Lu Hongmin Zhou Yuming Xu Baowen |
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| Abstract: | This paper uses three size metrics,which are collectable during the design phase,to analyze the potentially confounding effect of class size on the associations between object-oriented(OO)metrics and maintainability.To draw as many general conclusions as possible,the confounding effect of class size is analyzed on 127 C systems and 113 Java systems.For each OO metric,the indirect effect that represents the distortion of the association caused by class size and its variance for individual systems is first computed.Then,a statistical meta-analysis technique is used to compute the average indirect effect over all the systems and to determine if it is significantly different from zero.The experimental results show that the confounding effects of class size on the associations between OO metrics and maintainability generally exist,regardless of whatever size metric is used.Therefore,empirical studies validating OO metrics on maintainability should consider class size as a confounding variable. |
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| Keywords: | object-oriented metrics validation class size confounding maintainability |
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