Dimensional comparisons are comparisons between different domains. They are well known in educational psychology. Here, they explain the seemingly paradoxical finding that students' math and verbal self-concepts of ability usually show correlations close to zero, although students' math and verbal achievements show strong positive correlations. This finding can be explained by the fact that students overemphasize potential differences between their math and verbal achievements when they form their self-concepts. However, dimensional comparisons also take place and affect self-evaluations outside the educational context, and the number of studies examining dimensional comparisons in different contexts has significantly increased during the last few years. This paper provides an up-to-date overview of findings on dimensional comparisons. It presents findings from studies that have examined effects of dimensional comparisons (as most studies dealing with dimensional comparisons have done so far), as well as studies that have focused on an understanding of the psychological processes involved in dimensional comparison (which relatively few studies have done so far). It is hoped that this paper will help broaden awareness of dimensional comparisons and stimulate further research on this type of comparison, especially in disciplines other than educational psychology.

中文翻译：

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维度比较：对效果了解很多，对过程了解较少

维度比较是不同领域之间的比较。他们在教育心理学中广为人知。在这里，他们解释了看似自相矛盾的发现，即学生的数学和语言自我能力概念通常显示出接近于零的相关性，尽管学生的数学和语言成绩显示出很强的正相关性。这一发现可以通过以下事实来解释：学生在形成自我概念时过分强调他们的数学和语言成绩之间的潜在差异。然而，维度比较也会发生并影响教育背景之外的自我评价，在过去几年中，研究不同背景下维度比较的研究数量显着增加。本文提供了维度比较结果的最新概述。它介绍了研究维度比较效果的研究结果（正如迄今为止大多数处理维度比较的研究所做的那样），以及专注于理解维度比较所涉及的心理过程的研究（相对较少的研究有到目前为止完成）。希望本文能帮助拓宽对维度比较的认识，并激发对这种比较的进一步研究，尤其是在教育心理学以外的学科。以及专注于理解维度比较所涉及的心理过程的研究（迄今为止，开展的研究相对较少）。希望本文能帮助拓宽对维度比较的认识，并激发对这种比较的进一步研究，尤其是在教育心理学以外的学科。以及专注于理解维度比较所涉及的心理过程的研究（迄今为止，开展的研究相对较少）。希望本文能帮助拓宽对维度比较的认识，并激发对这种比较的进一步研究，尤其是在教育心理学以外的学科。