In Japan, a set of psychological characteristics similar to "noncognitive skills" and "social and emotional skills" are often referred to as "noncognitive abilities." This paper reviews the basic ideas about noncognitive abilities and discusses issues from various perspectives. Noncognitive abilities are conceptually defined from four perspectives. First, the conceptual definition of noncognitive abilities is identified as including various psychological characteristics other than cognitive abilities. Then, three definitions of noncognitive abilities are outlined: measurability, predictability, and possibility of intervention. Measurability is discussed in terms of issues of reliability and validity, factor analysis models, and recent research trends in psychological skills. Predictability is discussed in terms of bandwidth-fidelity trade-offs, predictive power, and social outcome measures. Regarding the possibility of intervention, the issues of the perspective or position from which the intervention is made and the issue of the possibility of transformation of other psychological traits related to the psychological trait that was the target of the change are discussed. From the above discussion, issues to be further examined are summarized.
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