The seven effects, in plain words
What the study measures
Seven choice-set context effects: adding or relabeling an option in a multi-attribute choice set shifts the shares among the options that were already there. Each is paired with one registered statistic, computed against a matched control cell, and each must first pass its own human gate — an effect that does not replicate in our calibrated sample exits fidelity scoring and is reported as a replication result in its own right.
A registered counterbalance cuts across the frequency, range, and phantom structures: the decoy targets the premium (high-desirability) option in five categories and the budget (high-feasibility) option in the other five, with a registered directional prediction that the premium-target effect is the stronger one. Six of the seven tests share one binary control cell per category and tier, so all confirmatory tests are Holm-corrected within families of effects.
The registered stimuli
Stimulus browser
Every option value in every cell, read from the same single stimulus file that the survey, the model runner, and the analysis consume — the appendix tables are generated from it, so what you see here is what both humans and models will see.
Values marked not calibration-locked await the calibration pre-test, which places every binary baseline in the registered 40–60 band before any confirmatory choice is collected; the locked values are written back into this same file when Stage 1 is accepted.
Structure codes — BIN: binary baseline · FRQ: frequency decoy · RNG: range decoy · PHT: phantom (displayed but unavailable) · SOT: compromise (a new extreme makes the former premium the middle) · MOT: the twelve-option three-tier extremity menu · EXC: the matched single-option-per-tier extremity control · SYM: the upscaling symmetric decoy · SIM: the similarity near-clone, tested at both placements. Four categories carry a format module that re-runs BIN, FRQ, and SOT with attributes as words and as pictures (quantitative magnitude bars, shown where they exist).