Like many of the other disorders mentioned, some of the most common significant effects of the disorder can be seen in social behaviors, leading to improvements in interaction, conversation, and other such skills. A meta-study of over 330 subjects showed that music therapy produces highly significant improvements in social behaviors, overt behaviors like wandering and restlessness, reductions in agitated behaviors, and improvements to cognitive defects, measured with reality orientation and face recognition tests. The effectiveness of the treatment seems to be strongly dependent on the patient and the quality and length of treatment.