"A central feature of many of these therapies is the use of psychological, physical, or aggressive means to provoke the child to catharsis, ventilation of rage, or other sorts of acute emotional discharge. To do this, a variety of coercive techniques are used, including scheduled holding, binding, rib cage stimulation (e.g., tickling, pinching, knuckling), and/or licking. Children may be held down, may have several adults lie on top of them, or their faces may be held so they can be forced to engage in prolonged eye contact. Sessions may last from 3 to 5 hours, with some sessions reportedly lasting longer... Similar but less physically coercive approaches may involve holding the child and psychologically encouraging the child to vent anger toward her or his biological parent."