When a sea star strives to get near an urchin, the urchin moves its spines aside and lets the sea star's arm get really close. Then the pincers chomp on the sea star's tube feet. The sea star immediately backs off. However, purple sea urchins' pincers can't defend against sunflower stars. If a sunflower star approaches, an urchin waves its spines and pincers and retreats. If the urchin doesn't move away fast enough, the sunflower star swallows the urchin whole.
Interpersonal therapy: A form of psychotherapy in which the focus is on a patient's relationships with peers and family members and the way they see themselves.Interpersonal psychotherapy (IPT) is based on exploring issues in relationships with other people.nterpersonal therapy: A form of psychotherapy in which the focus is on a patient's relationships with peers and family members and the way they see themselves.
Interpersonal therapy (IPT) is most often used on a one-on-one basis to treat depression or dysthymia (a more persistent but less severe form of depression). The current manual-based form of IPT used today was developed in the 1980's by Gerald Klerman, M.D., and Myrna Weissman, M.D.ialectical Behavior Therapy. Dialectical behavior therapy (DBT), a form of CBT, was developed by Marsha Linehan, Ph.D. At first, it was developed to treat people with suicidal thoughts and actions. It is now also used to treat people with borderline personality disorder (BPD).