The first test was done between two and four years old. This test was done to test deceitful-callous behavior. They used three tools to measure deceitful-callous behavior, which include: child behavior checklist, adult-child behavior, and eyberg child behavior inventory. Once the child was nine and a half years old he/she was tested again. This time the researchers tested for aggressive and rebellious behavior and callous-unemotional
The first test was done between two and four years old. This test was done to test deceitful-callous behavior. They used three tools to measure deceitful-callous behavior, which include: child behavior checklist, adult-child behavior, and eyberg child behavior inventory. Once the child was nine and a half years old he/she was tested again. This time the researchers tested for aggressive and rebellious behavior and callous-unemotional