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Having episodes of binge eating is central to the binge eating disorder (BED) and bulimia nervosa (BN) diagnoses but may be difficult to assess accurately through self-report instruments and estimates of prevalence varies [1,2]. Some researchers have reported lower levels of binge eating in clinical interviews where interviewers may use follow up questions and correct misunderstandings, compared with self-report questionnaires [3]. Another reason for mixed results may be the negative stigma of binge eating behaviours and thus the embarrassment of admitting having binge eating episodes [4,5].

Homework assignments that patient work with between sessions is a key component in both face-to-face and Internet-based Cognitive Behavior Therapy (CBT). However, adherence to assignments is often low and it is largely unclear what factors predict or affect treatment adherence, and in the end, treatment outcomes. The overall aim of this thesis was to investigate if treatment presentation and therapist support can affect adherence and treatment outcome in internet-based CBT, whether adherence can be predicted by motivation variables and to compare differences in face-to-face and online conditions in this regard.

A randomized controlled trial with a brief online relaxation program for people with stress and anxiety symptoms was conducted (n = 162). Participants in the enhanced support conditions completed a larger proportion of the online treatment but adherence was not affected by enhanced treatment presentation (Study I). Participants reported reduced symptoms of stress and anxiety after the relaxation program but there were no significant additional effects of enhanced presentation or support (Study II). Participants who adhered to the prescribed assignments reported lower symptom levels at study end, regardless of treatment conditions. Adherence to the online treatment was predicted by subject factors such as treatment credibility prior to the treatment and intrinsic motivation during the treatment (Study III). To further elucidate how motivation may affect adherence, an experiment with a one-session psychotherapy model was subsequently conducted (n = 100). Participants who were randomized to the face-to-face condition reported higher motivation for the assignment and completed significantly more of the homework compared to participants in the online condition (Study IV). Self-reported intrinsic motivation could predict adherence in both conditions while new motivational variables were identified specifically for the online condition.

The results from these studies confirm that adherence to assignments in Internet-based CBT is difficult to affect with treatment features but can be predicted early in treatment by subject factors such as treatment credibility and motivation. How such motivational variables can be affected to improve treatments is still unclear.

Background: Adherence to treatment homework is associated with positive outcomes in behavioral psychotherapy but compliance to assignments is still often moderate. Whether adherence can be predicted by different types of motivation for the task and whether motivation plays different roles in face-to-face compared to online psychotherapy is unknown. If models of motivation, such as Self-determination theory, can be used to predict patients’ behavior, it may facilitate further research into homework promotion. The aims of this study were, therefore, to investigate whether motivation variables could predict adherence to a prescribed assignment in face-to-face and online interventions using a psychotherapy analog model. Methods: A total of 100 participants were included in this study and randomized to either a face-to-face or online intervention. Participants in both groups received a psychoeducation session and were given an assignment for the subsequent week. The main outcome measurements were self-reported motivation and adherence to the assignment. Results: Participant in the face-to-face condition reported significantly higher levels of motivation and showed higher levels of adherence compared to participants in the online condition. Adherence to the assignment was positively associated with intrinsic motivation and intervention credibility in the whole sample and especially in the online group. Conclusions: This study shows that intrinsic motivation and intervention credibility are strong predictors of adherence to assignments, especially in online interventions. The results indicate that intrinsic motivation may be partly substituted with face-to-face contact with a therapist. It may also be possible to identify patients with low motivation in online interventions who are at risk of dropping out. Methods for making online interventions more intrinsically motivating without increasing external pressure are needed.

Background: In previous research, variables such as age, education, treatment credibility, and therapeutic alliance have shown to affect patients' treatment adherence and outcome in Internet-based psychotherapy. A more detailed understanding of how such variables are associated with different measures of adherence and clinical outcomes may help in designing more effective online therapy.

Objective: The aims of this study were to investigate demographical, psychological, and treatment-specific variables that could predict dropout, treatment adherence, and treatment outcomes in a study of online relaxation for mild to moderate stress symptoms.

Methods: Participant dropout and attrition as well as data from self-report instruments completed before, during, and after the online relaxation program were analyzed. Multiple linear and logistical regression analyses were conducted to predict early dropout, overall attrition, online treatment progress, number of registered relaxation exercises, posttreatment symptom levels, and reliable improvement.

Results: Dropout was significantly predicted by treatment credibility, whereas overall attrition was associated with reporting a focus on immediate consequences and experiencing a low level of intrinsic motivation for the treatment. Treatment progress was predicted by education level and treatment credibility, whereas number of registered relaxation exercises was associated with experiencing intrinsic motivation for the treatment. Posttreatment stress symptoms were positively predicted by feeling external pressure to participate in the treatment and negatively predicted by treatment credibility. Reporting reliable symptom improvement after treatment was predicted by treatment credibility and therapeutic bond.

Conclusions: This study confirmed that treatment credibility and a good working alliance are factors associated with successful Internet-based psychotherapy. Further, the study showed that measuring adherence in different ways provides somewhat different results, which underscore the importance of carefully defining treatment adherence in psychotherapy research. Lastly, the results suggest that finding the treatment interesting and engaging may help patients carry through with the intervention and complete prescribed assignments, a result that may help guide the design of future interventions.

Symptoms of stress are common in the general population and associated with health risks and economic costs. Applied relaxation training has shown to be effective for reducing stress and worry both as a self-help treatment and as an internet-based intervention with therapist support. However, what factors may affect the outcome of internet based relaxation training is unclear. The aims of the present study were to investigate the effect of a brief internet based relaxation program for people with symptoms of stress or worry and to assess whether enhancing the quality of intervention presentation or therapist support had an impact on outcomes.

Participants were randomized in a full factorial design to either Normal or Enhanced treatment Presentation and either Normal or Enhanced therapist Support in a four-week online program with applied relaxation. The main outcome measures were self-report instruments of stress and worry.

A total of 162 participants were included in the study and 94 and 84 participants completed the post and follow-up measurements respectively. Participants in all conditions improved significantly on the main outcome measures, and the different levels of Presentation or therapist Support did not significantly affect treatment outcome. Registered number of completed exercises was a predictor of better treatment outcome, but this effect was independent of treatment condition. Enhancing internet based interventions by improving presentations and the quality of support may thus not be the best way to further improve the effect of internet based interventions. More specific knowledge of the mechanisms that affect outcomes in online psychotherapy is needed.

PURPOSE: A large group of women (20-30%) report psychological distress shortly after breast cancer diagnosis, and some experience continued or increased symptoms over time. The aim of this study was to investigate socio-demographic and clinical variables associated with sustained psychological distress in this patient group. METHODS: Women with breast cancer (n=833) completed self-report questionnaires regarding socio-demographic and clinical variables shortly after (T1) and 3years after diagnosis (T2) while data on illness severity were collected from a quality register. The Hospital Anxiety and Depression Scale was used as a measure of psychological distress at both time points. RESULTS: The number of participants who reported elevated levels of anxiety was 231 (28%) at T1 and 231 (28%) at T2 while elevated depressive symptoms was reported by 119 (14%) women at T1 and 92 (11%) at T2. Despite non-significant differences in mean scores over time, 91 (15%) participants reported increased anxiety symptoms and 47 (7%) reported increased depressive symptoms. Poor financial situation, lack of social support, previous psychiatric treatment, and high levels of fatigue were associated with both anxiety and depressive symptoms. Reporting high levels of fatigue was the variable most strongly associated with increased psychological distress over time. CONCLUSION: Most participants reported decreased psychological distress over time, but there were subgroups of women who experienced sustained or increased symptoms of anxiety or depression. Participants with poor financial status, previous psychological problems, or high levels of fatigue may be at increased risk of psychological distress. Such individuals may benefit most from psychosocial interventions.

In both face to face and Internet based Cognitive Behavior Therapy, patients' adherence can be improved by different means such as by using motivational techniques or automatic reminders. The main aim of this study was to investigate whether enriched treatment material presentation and/or increased frequency and quality of support would increase participants' adherence to an online relaxation program. One hundred and sixty-two participants with mild to moderate symptoms of stress or worry were included in this study. Participants were randomized to either Normal or Enhanced intervention presentation and Normal or Enhanced support in a full factorial design. Main outcome variables were progress through the online intervention and adherence to prescribed exercises. Participants in the Enhanced support group progressed further through the program than participants in the Normal support group (Z = 2.11, p = .035, r = .17) but there were no significant differences found between the Normal and Enhanced presentation groups. Participants registered a mean of 60% of the prescribed exercises with no significant differences between groups. This study shows that adherence to online interventions can be increased by increased frequency and quality of therapeutic contact. Future studies may investigate how to increase adherence to prescribed homework assignments and whether parts of the therapeutic support may be substituted with automatic systems with retained effects.