Here is the design of a clinical trial:

Official Title: Executive Training in Cerebral Palsy: Participation, Quality of Life and Brain Connectivity

Included conditions:
- Cerebral Palsy

Study Armgroups:
- {'label': 'Immediate intervention group', 'type': 'EXPERIMENTAL', 'description': 'Thirty children with CP aged 8 to 12 years (or fifteen with neuroimage data) will participate in a computerized executive training program from home (12 weeks, 5 days a week, 30 min a day).', 'interventionNames': ['Behavioral: Computerized Executive Functions training']}
- {'label': 'Wait-list delayed intervention', 'type': 'OTHER', 'description': 'Thirty children with CP (or fifteen with neuroimage data) matched by age, sex, motor and cognitive impairment severity.', 'interventionNames': ['Other: Care as usual']}

Interventions:
- {'type': 'BEHAVIORAL', 'name': 'Computerized Executive Functions training', 'description': 'Home-based executive function training with adaptive difficulty, through NeuronUp (https://www.neuronup.com) over 12 weeks (30 min/day, 5 days per week, 30h in total).', 'armGroupLabels': ['Immediate intervention group']}
- {'type': 'OTHER', 'name': 'Care as usual', 'description': 'Care as usual', 'armGroupLabels': ['Wait-list delayed intervention']}

Primary Outcomes:
- {'measure': 'Change from baseline Executive Function', 'description': 'Spatial Span, Wechsler Nonverbal Scale of Ability (WNV)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Digit Span, Wechsler Intelligence Scale for Children, Fifth Edition (WISC-V)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Five Digit Test (FDT)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Auditory attention and Response Set, A Developmental NEuroPSYchological Assesment-II (NEPSY-II)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Word Generation, A Developmental NEuroPSYchological Assesment-II (NEPSY-II)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Tower Test, Delis-Kaplan Executive Function System (D-KEFS)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': "Conners' Continuous Performance Test-II (CPT-II)", 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Theory of Mind, A Developmental NEuroPSYchological Assesment-II (NEPSY-II)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Affect Recognition, A Developmental NEuroPSYchological Assesment-II (NEPSY-II)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}
- {'measure': 'Change from baseline Executive Function', 'description': 'Behavior Rating Inventory of Executive Function, Second Edition (BRIEF-2)', 'timeFrame': 'T0: 1 week before beginning; T1: 1 week immediately after training; T2: follow up (nine month after finished training)'}

Please estimate the sample size based on the assumption: 
80% power, significance level (α) of 0.05, and 15% attrition rate.
Sample size determination
        The required sample size was calculated by taking into account the differences in the continuous primary outcomes after 12âweeks of following the computerized training programme. Simulations under two different scenarios were carried out. Specifically, calculations for separate tests and multiple-end-points were performed. By comparing the two scenarios, conservative figures regarding sample size were estimated. As a result, to detect a large standardized difference (i.e. a difference of at least 0.8 SD) between the immediate intervention and waitlist groups, with 80% power and Î±â=â0.05, 26 children would be necessary in each group. Assuming 15% attrition, the required sample size was calculated as 60 participants.