Linking callous-unemotional traits to instrumental and non-instrumental forms of aggression
2009 — CU traits and forms of aggression
Research question
Do CU traits differentiate forms and combinations of aggressive behavior?
Finding
The study reported that CU traits could designate important subgroups among aggressive children across bullying/victimization and proactive/reactive aggression patterns.
Why it matters
This is an early node in the heterogeneity branch: outward aggression is not treated as a single homogeneous phenomenon.
Inference boundary
Subgroup differentiation does not establish that CU traits cause the aggressive patterns.