By contrast, children of unresponsive or insensitive caregivers form insecure attachment. They become anxious and easily distressed by the smallest sign of separation from their attachment figure. Harsh or dismissive mothers produce avoidant infants, who suppress their emotions and deal with stress alone. Finally, children with abusive caregivers become disorganised: they switch between avoidant and anxious coping, engage in odd behaviours and, like Cora, often self-harm.

Source: How you attach to people may explain a lot about your inner life | Science | The Guardian