Using their evaluative and psychotherapy skills, art therapists choose materials and interventions appropriate to their clients' needs and design sessions to achieve therapeutic goals and objectives. They use the creative process to help their clients increase insight, cope with stress, work through traumatic experiences, increase cognitive, memory and neurosensory abilities, improve interpersonal relationships and achieve greater self-fulfillment. The activities an art therapist chooses to do with clients depend on a variety of factors such as their mental state or age. Art therapists may draw upon images from resources such as ARAS (Archive for Research in Archetypal Symbolism) to incorporate historical art and symbols into their work with patients. Depending on the state, province, or country, the term "art therapist" may be reserved for those who are professionals trained in both art and therapy and hold a master or doctoral degree in art therapy or certification in art therapy obtained after a graduate degree in a related field. Other professionals, such as mental health counselors, social workers, psychologists, and play therapists optionally combine art-making with basic psychotherapeutic modalities in their treatment. Therapists may better understand a client's absorption of information after assessing elements of their artwork.