Approximately 760,000 emerging adults use outpatient psychotherapy in the U.S. each year (Olfson et al.2002). Emerging adults are 1.6-7.9 times more likely to drop out of mental health treatment than Fully mature adults (Edlund et.al., 2002; Olfson Et al., 2002).This Study compared temporal patterns of attendance and non attendance between emerging and mature adults.