Abstract: The stability and flexibility of "task consciousness" of 10 second grade children (selected from the same class, five distinctly more intelligent and five distinctly less intelligent) were investigated with experiment, group test and interview. The results show:1. In more intelligent Children, the stability and flexibility of "task consciousness" are mostly of a higher degree, and in children with lower intellectual level, the stability and flexibility of "task consciousness" are mostly of a lower degree. This shows that the stability and flexibility of "task consciousness" are important factors to intellectual activities.2. After comparing individual subjects, it was found that in some individual cases, the level of intellectual activities and the degree of stability and flexibility of "task consciousness" are not always in accordance. This shows that although stability and flexibility of "task consciousness" are considered as important factors to intellectual activities, but the former and the latter are different in nature.3. As to the relation of the two traits, stability and flexibility, they are neither exclusive of one another nor perfectly related to each other. This shows that they are two mutually characteristics, but not two extremities of a single characteristic.

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