Here is the design of a clinical trial:

Official Title: The Role of Computerized Training in Post-Traumatic Stress Disorder

Included conditions:
- Post-Traumatic Stress Disorder

Study Armgroups:
- {'label': 'Intervention', 'type': 'EXPERIMENTAL', 'description': 'Computerized Cognitive Bias Modification of Appraisals (CBM-App), developed from that used by Woud et al. (2012,2013). The intervention comprises 8 sessions completed over a period of 2 weeks. The training takes place while participants are also receiving specialized inpatient treatment for PTSD at the Clinic for Psychosomatic Medicine and Psychotherapy, LWL University Clinic of Ruhr University of Bochum.', 'interventionNames': ['Behavioral: Cognitive Bias Modification of Appraisals (CBM-App)']}
- {'label': 'Control', 'type': 'SHAM_COMPARATOR', 'description': 'Computerized Peripheral Vision Task (PVT), developed from that used by Calkins et al. (2015). The intervention comprises 8 sessions completed over a period of 2 weeks. The training takes place while participants are also receiving specialized inpatient treatment for PTSD at the Clinic for Psychosomatic Medicine and Psychotherapy, LWL University Clinic of Ruhr University of Bochum.', 'interventionNames': ['Behavioral: Peripheral Vision Task (control condition)']}

Interventions:
- {'type': 'BEHAVIORAL', 'name': 'Cognitive Bias Modification of Appraisals (CBM-App)', 'armGroupLabels': ['Intervention']}
- {'type': 'BEHAVIORAL', 'name': 'Peripheral Vision Task (control condition)', 'armGroupLabels': ['Control']}

Primary Outcomes:
- {'measure': 'Dysfunctional trauma-related appraisals as measured using an open-ended ambiguous scenarios task', 'timeFrame': 'Post-intervention (~ 2 weeks post-baseline)'}

Please estimate the sample size based on the assumption: 
The power calculation was based on 80% power at a significance level of p=0.05, with an allowance for up to 15% attrition.
Sample size
        Sample size was informed by a power calculation to find a between-group effect of d=0.70, with 80% power at p=0.05. A meta-analysis by Hallion and Ruscio54 found an effect size of g=0.81 for the effect of CBM on interpretation bias. We took a more conservative estimate of d=0.70, requiring 35 participants per group. To allow for up to 15% attrition, we planned to recruit 80 participants.