Brand Function Specification Rescue — VkusVill Four Conditions

DCI and Ideological dimension weight for VkusVill across four experimental conditions: two comparator types (Whole Foods vs. Trader Joe's) crossed with presence or absence of a Brand Function specification. The spec rescues the Ideological dimension that the corrective comparator destroys (8.4 without spec, 14.8 with spec) but does not restore total DCI to baseline.

Four-row table showing VkusVill conditions. Without spec: Whole Foods comparator DCI 28.9 / Ideological 14.3; Trader Joe's comparator DCI 36.3 / Ideological 8.4 (minimum). With spec: Whole Foods comparator DCI 33.9 / Ideological 15.2; Trader Joe's comparator DCI 33.9 / Ideological 14.8. The spec rescues the Ideological dimension to baseline level regardless of which comparator is used.

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DCI = Dimensional Collapse Index. Ideological = cross-model mean weight assigned to the Ideological dimension. Data from R15 specification follow-up (147 API calls, seven conditions, seven models, three runs per cell, mix of English and Russian-language instructions).

Chart: Dmitry ZharnikovSource: R15: Dimensional Collapse in AI-Mediated Brand Perception (Zharnikov, 2026v)Get the dataCreated with Datawrapper