Each survey synthesizes the research literature on a domain relevant to personal practice: what the evidence actually shows, where it is contested, and what it implies for individual self-experimentation.
Automaticity, cues, repetition, and identity in habit formation. Covers habit measurement, context change, discontinuity and relapse, and the distinction between habit formation and maintenance.
From sleep architecture and the two-process model to evidence-based interventions and consumer tracker accuracy. Covers chronotype, individual sleep need, clinical red flags, and N=1 experiment protocols.
Why population research cannot predict individual responses, and how to design valid self-experiments. Covers crossover design, statistical methods, common threats to validity, and practical experiment planning.
The psychophysiology of stress and recovery, heart rate variability as a within-person trend metric, and evidence-ranked interventions. Covers allostatic load, HRV measurement, and the boundary between recovery science and wellness speculation.
An evidence-tiered review of supplements and nootropics. Distinguishes deficiency correction from general enhancement, covers safety and interaction risks, and frames supplementation as a domain for structured self-experimentation.