The investigators' previous research identified two distinct subtypes of Cognitive Flexibility (CF), termed CF1 (shifting flexibility) and CF2 (strategy flexibility). The present study aims to determine whether these forms of CF can be trained, how they differ, and the extent to which improvements transfer to broader learning and cognitive skills. In addition, social functioning outcomes and the extent to which social factors moderate the effects of cognitive flexibility training are assessed. The investigators will employ a multi-modal approach combining cognitive-behavioural and neuroimaging methods to examine how brain mechanisms and cognitive performance change following CF-targeted training intervention (Structure learning) compared with active control and a no-training paradigm (passive control).
Age range
18 Years – 29 Years
Sex
ALL
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The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Structure Learning Outcome 1 - Performance Index (PI) Relative
Timeframe: Through training completion (adaptive, up to 12 days)
Structure Learning Outcome 2 - Strategy choice
Timeframe: Through training completion (adaptive, up to 12 days)
Structure Learning Outcome 3 - Strategy ICD index (measured by the integral curve difference)
Timeframe: Through training completion (adaptive, up to 12 days)
Structure Learning Outcome 4 - Learning rate
Timeframe: Through training completion (adaptive, up to 12 days)
Structure Learning Outcome 5 - Strategy shifting rate
Timeframe: Through training completion (adaptive, up to 12 days)
'All You Can E.T.' (AYCET) Outcome 1 - Accuracy
Timeframe: Through training completion (adaptive, up to 12 days)
'All You Can E.T.' (AYCET) Outcome 2 - Response Time (RT)
Timeframe: Through training completion (adaptive, up to 12 days)
Cognitive Flexibility (Strategy) Outcome 1 - Wisconsin Card Sorting Test (WCST): Proportion of perseverative errors
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 2 - Wisconsin Card Sorting Test (WCST): Learning rate
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 3 - Wisconsin Card Sorting Test (WCST): Decision consistency
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 4 - Intra/Extra-Dimensional Set Shifting (IED): Extra-dimensional set errors
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 5 - Intra/Extra-Dimensional Set Shifting (IED): Extra-dimensional reversal errors
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 6 - Intra/Extra-Dimensional Set Shifting (IED): Learning rate
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 7 - Intra/Extra-Dimensional Set Shifting (IED): Choice determinism
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 8 - Intra/Extra-Dimensional Set Shifting (IED): Dimension primacy
Timeframe: Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 9 - Probabilistic Reversal Learning (PRL): Perseveration
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 10 - Probabilistic Reversal Learning (PRL): Switch probability
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 11 - Probabilistic Reversal Learning (PRL): Trials to criterion in block 2 (Reversal)
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 12 - Probabilistic Reversal Learning (PRL): Learning rates
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 13 - Probabilistic Reversal Learning (PRL): Reinforcement sensitivity
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Strategy) Outcome 14 - Probabilistic Reversal Learning (PRL): Stickiness
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 1 - Task Set Switching - Where (TSS-Where): Task switch cost in RT
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 2 - Task Set Switching - Where (TSS-Where): Task switch cost in Accuracy
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 3 - Task Set Switching - What (TSS-What): Task switch cost in RT
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 4 - Task Set Switching - What (TSS-What): Task switch cost in Accuracy
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 5 - Colour Shape Task (CST): Task switch cost in RT
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 6 - Colour Shape Task (CST): Task switch cost in Accuracy
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 7 - Colour Shape Task (CST): Change in task switch cost in RT
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 8 - Colour Shape Task (CST): Change in task switch cost in accuracy
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Cognitive Flexibility (Shifting) Outcome 9 - Trail Making Test (TMT): Ratio between time to complete Trail B to Trail A
Timeframe: Post-intervention (within one week after post-MRI scan)
Working Memory Outcome 1 - Backwards Digit Span (BDS): Total items correct
Timeframe: Pre-intervention (within one week before pre-MRI scan) and Post-intervention (within one week after post-MRI scan)
Working Memory Outcome 2 - Spatial Working Memory (SWM): Between search errors
Timeframe: Post-intervention (within one week after post-MRI scan)
Working Memory Outcome 3 - Spatial Working Memory (SWM): Strategy score
Timeframe: Post-intervention (within one week after post-MRI scan)
Inhibition Outcome 1 - Stroop Task: Interference measure for RT
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan)
Inhibition Outcome 2 - Stroop Task: Interference measure for accuracy
Timeframe: Baseline (pre-intervention and within two weeks prior to pre-MRI scan)