This study analyzed the effects of creative thinking, psychomotor skills, and creative self-efficacy (CSE) on the engineering design creativity of 208 eighth grade students (junior 2, 14 years old). Our main conclusions are as follows: 1. Students scored highest in CSE, followed by creative thinking and psychomotor skills. Male and female students exhibited no significant difference in creative thinking or CSE. However, female students showed superior creative performance and psychomotor skills. 2. Creative performance showed low-intermediate to intermediate correlations with creative thinking, psychomotor skills, and CSE. 3. Creative thinking, psychomotor skills, and CSE predicted creative performance. Among these factors, psychomotor skills had the strongest direct effect, and creative thinking had the weakest direct effect.
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