According to a recent study described in Health Day News, mental abuse may leave life-long scars. "Constantly belittling, threatening or ignoring children can be as damaging to their mental health as physical or sexual abuse, according to a new report from a pediatricians' group.
But, with no bruises to spot, pediatricians, teachers and family members may have trouble recognizing these and other forms of psychological abuse. Not only are there no obvious physical scars, there is no universally agreed-upon definition of what constitutes psychological maltreatment of children, and a fine line can exist between not-so-great parenting and outright abuse, experts say." MORE 
How would you define mental abuse? Would you recognize it in a child? How?