Object This research

which involved 30 5-year-olds

7-year-olds

and adults respectively

aimed to investigate how children understand the stability of different traits and to provide the evidence that which strategies helped childen to fuifull their task.Method Based on the traditional approach of behavior prediction It used "behavior-traits-behavior" methodology.Results Two experiments explored young children limited their consistent predictions to non-psychological contexts.In psychological context

children made different predictions on different traits.Conclusion Children might understand phycial attributes earlier than social attributes.In the field of socity

children might select different inference strategies for its counterpoint

social-intention

biological traits and phycial ability.