Those associated with poor parenting are the most vulnerable individuals to developing this mental illness. Bad parenting can include the failure to protect a child from abuse from outside, from another family or from the other parent. Children can still develop borderline personality disorder even if they have not been subjected to such environmental trauma. (Friedel, 2012) The most frequent childhood abuse was found to be sexual abuse (Bohus, Lieb, Linehan, n.d.). Numerous studies have analyzed the contribution of interpersonal trauma in borderline personality and have identified childhood sexual abuse as an important psychological risk factor. In one study they conducted, they found that individuals who reported experiencing interpersonal trauma at any point in their lives were eight times more likely to screen positive for borderline personality disorder. (Westphal, Bravova, Gameroff, Gross, Wickramaratne, & Neria, 2013) Another study demonstrated that a possible explanation for emotional dysregulation is linked to traumatic experiences and that traumatic events hinder the development of recognition and labeling of emotional states. Being able to identify and describe emotions is important for processing emotional experiences in everyday life. (Gaher, Hofman, Simons and Hunsaker,