Complete, reproducible campaign data for PRISM-M, a pre-registered instrument that
measures when two brands with structurally distinct eight-dimension perception profiles
become indistinguishable under an aggregating readout (a scalar health score, a ranking,
a binary pick). A pair counts as a measured metamer only when the full readout resolves
it beyond the instrument's own operator noise floor while the aggregate readout, with its
own… See the full description on the dataset page:
https://huggingface.co/datasets/spectralbranding/prism-m-metamerism.
