{
  "study_id": "NCT07407595",
  "agent": "baseline",
  "run": 5,
  "p_primary_hypothesis_supported": 0.33,
  "effect_direction": "other: small and uncertain, slight lean toward reduced excitability (negative d) in the pain-expectation group",
  "effect_size_90pct_interval": {"low": -0.9, "high": 0.5, "metric": "Cohen's d for the between-group difference in change in excitability from baseline to post-cream (positive = excitability increases more, or falls less, in the pain-expectation group)"},
  "moderator_prediction": "Higher pain catastrophizing/kinesiophobia participants may show larger (more inhibitory) changes, since threat appraisal amplifies anticipatory motor adaptation; but with n=22 per arm this moderation will be underpowered and likely non-significant.",
  "claim_ids_used": [],
  "rationale": "Small parallel RCT (n=44, ~22/arm), unblinded, single session, objective neurophysiological outcome (TMS I/O curves) with high between-subject and trial-to-trial variability. Primer: expectation/placebo effects shrink toward zero on objective outcomes (OLP objective SMD ~0.09); pre-registered experiments succeed ~44%. Verbal nocebo suggestion without conditioning or real pain, and the target muscle (FDI) is not the cream site, weakening any specific effect. Offsetting: resolution counts any of three Boltzmann parameters at two time points, giving multiplicity and forking paths that raise the chance of some significant interaction. Pain-anticipation literature leans toward MEP suppression, so a slight negative lean. Net probability about one in three."
}