工作原理：工具采用自定心原理，通过芯轴调节滚柱产生击打、滚压运动。
Working principles: Tool using a self-centering theory, generated through the mandrel roller adjustment hitting, rolling motion.
修订UPI信度和效度较高，使用简便，能迅速的确定心理咨询对象，可作为我国高中生心理健康筛测工具。
The reliability and rapidity of the revised UPI are high. This method can be effectively used for screening mental problems of high school students.
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