In environmental science, experimental design is an extremely important part of the scientific method. When a scientist seeks to prove or disprove a hypothesis, he or she must carefully design the experiment so that it tests only one thing, or variable.
Borderline personality disorder (BPD), also known as emotionally unstable personality disorder, is a long term pattern of abnormal behavior characterized by unstable relationships with other people, unstable sense of self, and unstable emotions.
Causes of Borderline Personality Disorder. Borderline personality disorder (BPD) is a Cluster B personality disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV). According to the American Psychiatric Association, Cluster B disorders are characterized by behavior that is dramatic, erratic and emotional.