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A1. Implementation Intentions — Neurological and Clinical Evidence
Core finding: If-then planning shifts cognitive control from effortful top-down prefrontal processing to automatic, stimulus-driven bottom-up processing. The effect is larger in clinical populations (including ADHD) than in general populations — the people who need it most benefit from it most.
Meta-analytic evidence:
- Gollwitzer & Sheeran 2006 (Advances in Experimental Social Psychology): 94 independent studies, 8,000+ participants. Medium-to-large effect of d = 0.65 for goal attainment, and d = 0.61 specifically for "getting started" problems — the precise deficit that characterises ADHD task paralysis.
- Sheeran, Listrom & Gollwitzer 2025 (European Review of Social Psychology): Bayesian mega-meta-analysis of 642 independent tests from 294 reports. Confirms behavioural effect size of d = 0.66. The contingent if-then format significantly outperforms mere scheduling. Effects amplified when plans are rehearsed at least once.
- Toli, Webb & Hardy 2016 (British Journal of Clinical Psychology): Meta-analysis of 29 studies with 1,636 participants with clinical diagnoses (including ADHD, schizophrenia, frontal-lobe lesions). Effect size of d = 0.99 — 52% larger than the general population effect. People with executive dysfunction benefit more from implementation intentions, not less.
ADHD-specific evidence:
- Gawrilow & Gollwitzer 2008 (Cognitive Therapy and Research): Two experiments with clinically diagnosed ADHD children on Go/No-Go tasks. Children who formed implementation intentions improved response inhibition to the same level as children without ADHD — functionally normalising their executive deficit. A second study showed additive effects with stimulant medication, suggesting the approach complements pharmacotherapy.
- Gawrilow, Gollwitzer & Oettingen 2011 (Journal of Social and Clinical Psychology): Extended implementation intentions to cognitive shifting (task-switching) — directly relevant to the ADHD challenge of transitioning into "doing mode."
- Wieber, Thürmer & Gollwitzer 2015 (Frontiers in Human Neuroscience): Implementation intentions remain effective under cognitive load and acute stress — exactly the conditions when ADHD users most need support.
Neuroimaging confirmation:
- Gilbert et al. 2009 (Journal of Experimental Psychology: Learning, Memory, and Cognition): fMRI shows implementation intentions shift activation from the lateral rostral prefrontal cortex (effortful top-down control — impaired in ADHD) to the medial rostral prefrontal cortex (automatic stimulus-driven control). Better prospective memory performance with reduced overall brain activation.
- Paul et al. 2007 (NeuroReport): EEG confirms if-then plans normalised the NoGo-P300 amplitude in ADHD children within the 160–312 millisecond window, consistent with early automatic processing rather than slow deliberate control.
Implication for Kon: The if-then automation feature and voice-activated micro-stepping are neurologically validated mechanisms with a d = 0.99 effect size in the target population. Voice capture must externalise implementation intentions instantaneously, before executive fatigue occurs. The system should prompt users to rehearse plans at least once (amplifies effect) and support varied cue types: time-based, environmental, and emotional.