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.
Symptoms: A person with borderline personality disorder has trouble controlling his thoughts and feelings, and often has impulsive and reckless behavior. Here are the condition's main symptoms: 1  Frantic efforts to avoid feeling abandoned. 2  History of unstable, intense relationships. 3  Poor self-image.