In general, "abuse" refers to (usually deliberate) acts of commission while "neglect" refers to acts of omission. "Child maltreatment" includes both acts of commission and acts of omission on the part of parents or caregivers that cause actual or threatened harm to a child. Some health professionals and authors consider neglect as part of the definition of "abuse", while others do not; this is because the harm may have been unintentional, or because the caregivers did not understand the severity of the problem, which may have been the result of cultural beliefs about how to raise a child. Delayed effects of child abuse and neglect, especially emotional neglect, and the diversity of acts that qualify as child abuse, are also factors.