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.
IPT is a time-limited psychotherapy that focuses on interpersonal issues, which are understood to be a factor in the genesis and maintenance of psychological distress.The targets of IPT are symptom resolution, improved interpersonal functioning, and increased social support.he original IPT manual, Interpersonal Psychotherapy for Depression [7], was published in 1984 as a manual for this research project. Since that time, IPT has been tested for a variety of affective disorders with different populations of patients.