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Introduction:  State /Trait Anxiety can be considered an unstable emotional state that reflects the individual's interpretation of a stressful situation in a particular time frame and varies depending on the degree to which the situation is perceived as threatening. The purpose of this study was to determine the prediction of State /Trait Anxiety based on the behavioral brain system of morning / evening types in students of Urmia University in the academic year 2015. Methods: This descriptive study was a correlational study in which 370 students of Urmia University (169 girls, 201 males) were selected by cluster random sampling. Data collection was done using “Spielberger State/Trait Anxiety Questionnaire”, “Carver & White Behavioral Brain Systems Questionnaires” and “Horne & Ostberge Morningness/Eveningness Types”. Validity have been confirmed in previous studies. Instruments reliability was calculated using Cronbach's alpha coefficient. Data was analyzed using SPSS. 22 software. Results: There was a correlation between behavioral brain systems and morning / evening type with predict state / trait anxiety (P < 0.01). The results of stepwise regression analysis showed that behavioral brain systems and morning / evening types predict 32% of the variance of State /trait anxiety. Conclusions: Behavioral brain systems of morning / evening types can predict state / trait anxiety of students. It is suggested that the findings be considered in the field of counseling by student counseling centers.Keywords: Behavioral Brain Systems, Evening-morning type, State /trait anxiety, Students. 

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Introduction: Nomo-Phobia like any other phobia requires medical attention, especially among adolescents. The purpose of this study was to comparing the effectiveness of adolescent-centered mindfulness with cognitive behavioral therapy and emotion-focused therapy on emotion regulation among adolescents’ girl with Nomo-phobia.
Methods: The research method was quasi-experimental with control group and the research design was pre-test, post-test and follow-up. The statistical population of this study consisted of all adolescents in Isfahan whose score was higher than the cut line in the “Nomophobia Questionnaire”. Sixty subjects were selected purposefully and were randomly divided into four groups of researcher-made adolescent mindfulness therapy, emotion-focused therapy, and cognitive-behavioral therapy and control group. Three treatment groups received 10 sessions of intervention for each treatment, while the control group did not. Data collection tool "Emotion Regulation Difficulty Scale". Validity and reliability of the questionnaire were confirmed by Cronbach's alpha method. Data were analyzed by SPSS.23.
Results: There were significant differences between the adolescent mindfulness therapy, emotion-focused therapy, and cognitive-behavioral therapy in difficulty in emotion regulation compared with the control group (P <0.01). However, there was no significant difference between the three treatments on emotion regulation (P <0.05).
Conclusions: Use of adolescent mindfulness therapy, emotion-focused therapy, and cognitive-behavioral therapy is helpful in regulating the emotion of adolescent girls with symptoms of Nomo-Phobia. It is recommended that the above treatments be used to reduce the symptoms of Nomo-Phobia.