{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp03_full320_20260801","cell_id":"negative_space_design__library_information_science","trajectory_id":"R","attempt_index":0,"archetype_slug":"negative_space_design","domain_slug":"library_information_science","decision":"CANDIDATE","problem_id":"crowded_discovery_result_relevance_judgment","causal_lever_id":"protected_separation_of_bibliographic_result_signals","proposal":{"problem":"HYPOTHESIS: Library discovery-result pages can present metadata, badges, controls, facets, and recommendations with insufficient perceptual separation, making patrons miss the fields needed to judge relevance and select a record.","actors_substrate":["Library patrons using discovery interfaces","Cataloging and metadata staff","Discovery-system product owners","Accessibility specialists","Bibliographic records, facets, controls, and system states"],"observable_state":"On populated result pages, many fields and controls have similar salience; patrons overlook relevant records, repeatedly open and close records, or confuse record boundaries. These observations require local validation.","consequence":"Relevant holdings may remain undiscovered while selection takes longer and avoidable navigation increases.","affected_objective":"Accurate, efficient, and accessible relevance judgment during catalog discovery.","structural_mapping":[{"archetype_element":"Competing elements obscure the intended form","domain_realization":"INFERENCE: Repeated metadata fields, badges, facets, and controls compete with title, creator, format, date, and availability cues.","claim_kind":"INFERENCE"},{"archetype_element":"Deliberate omission or muting","domain_realization":"HYPOTHESIS: Redundant or low-priority fields can be deferred to record detail or an explicit reveal without impairing first-pass judgment.","claim_kind":"HYPOTHESIS"},{"archetype_element":"Protected absence clarifies what remains","domain_realization":"HYPOTHESIS: Reserved gaps within and between result records can make record boundaries and key relevance signals easier to perceive.","claim_kind":"HYPOTHESIS"},{"archetype_element":"Absence has an explicit meaning and exit","domain_realization":"Zero-result, filtered-empty, loading-failure, and permission states receive distinct explanations; hidden secondary metadata has a visible reveal control.","claim_kind":"INFERENCE"},{"archetype_element":"Effect is validated by audience response","domain_realization":"A task test compares relevance-selection accuracy, time, navigation, interpretation, and accessibility against the current interface.","claim_kind":"INFERENCE"}],"component_map":[{"component":"Omission Candidate","status":"direct","domain_realization":"Inventory redundant badges, repeated labels, low-use fields, and premature actions for deferral."},{"component":"Protected Empty Space","status":"direct","domain_realization":"Reserve non-content-bearing gaps around key fields and between result records."},{"component":"Positive Form Relationship","status":"direct","domain_realization":"Tie each gap to clearer record grouping, field hierarchy, or separation from controls."},{"component":"Attention Competition Map","status":"direct","domain_realization":"Map visible elements by task relevance, salience, frequency, and urgency."},{"component":"Absence Boundary","status":"direct","domain_realization":"Specify minimum spacing and no-encroachment zones in result templates."},{"component":"Clarity or Effect Test","status":"direct","domain_realization":"Test selection accuracy, time, boundary recognition, and field recall."},{"component":"Rest and Pacing Zone","status":"adapted","domain_realization":"Use consistent inter-record gaps as scan-cycle resets, not blank pages or delays."},{"component":"Meaning-of-Absence Check","status":"direct","domain_realization":"Distinguish no matches, active-filter exclusion, loading failure, permission limits, and intentionally deferred metadata."},{"component":"Reintroduction Trigger","status":"direct","domain_realization":"Provide a labeled metadata reveal and restore full information on record detail."},{"component":"Accessibility and Recoverability Guardrail","status":"direct","domain_realization":"Preserve semantic structure, keyboard and screen-reader access, zoom behavior, and immediate recovery of hidden fields."},{"component":"Context Preservation Frame","status":"direct","domain_realization":"Retain essential identity, format, date, availability, location, uncertainty, and active-query/filter context."}],"mechanism_dispositions":[{"slug":"architectural_void","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"A building-scale volume is unnecessary for a result-list interface; spacing mechanisms provide the relevant relation.","counterfactual_removal":"Removing it does not change the proposal."},{"slug":"blank_or_rest_frame","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"A blank interruption would slow continuous scanning and could resemble a loading fault.","counterfactual_removal":"Removing it avoids an unnecessary interruption."},{"slug":"editorial_cut","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Defers only material shown by task review to be redundant or premature, while recording and preserving every cut.","counterfactual_removal":"Without disciplined cuts, equal-salience competition remains."},{"slug":"empty_state_design","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Diagnoses and labels distinct catalog-empty states and supplies an appropriate next action.","counterfactual_removal":"Populated lists could improve, but absence would remain ambiguous."},{"slug":"facilitation_silence","disposition":"incompatible","contribution_type":"NONE","adaptation_or_rejection":"The intervention concerns asynchronous interface scanning, not a powerful speaker withholding a turn.","counterfactual_removal":"No causal or operational change."},{"slug":"focus_mode_or_control_hiding","disposition":"selected_supporting","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Defers secondary controls only behind an obvious, keyboard-accessible reveal; critical context remains visible.","counterfactual_removal":"Safe recoverability of deferred controls would lack an explicit interaction rule."},{"slug":"margin_and_gutter_system","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Encodes responsive spacing tokens and protected result boundaries.","counterfactual_removal":"Clutter could return inconsistently across templates and screen sizes."},{"slug":"negative_space_logo","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"A hidden symbolic image does not improve bibliographic relevance judgment.","counterfactual_removal":"No change to the causal chain."},{"slug":"pause_in_speech","disposition":"incompatible","contribution_type":"NONE","adaptation_or_rejection":"Live spoken pacing does not match self-paced catalog scanning.","counterfactual_removal":"No change to viability."},{"slug":"sparse_layout","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Thins the first-pass result representation according to patron task priority, with secondary paths retained.","counterfactual_removal":"Too many simultaneous signals would continue competing."},{"slug":"whitespace","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Uses proximity and separation to communicate field grouping and record boundaries without added marks.","counterfactual_removal":"Omission alone would not create the protected perceptual structure."}],"causal_chain":["Map which result-page elements compete with first-pass relevance signals.","Preserve essential bibliographic and safety context while deferring validated low-priority elements.","Protect responsive gaps within and between records and make deferred information immediately recoverable.","Reduced competition and clearer grouping are hypothesized to improve recognition of record boundaries and relevant fields.","Measure whether patrons select appropriate records more accurately or efficiently without losing context or accessibility."],"baseline":"Ordinary baseline: retain the current dense result template; patrons scan all displayed fields, use facets, and open detail pages when the summary is insufficient.","nearest_rival":"Reorder fields and strengthen typography or color while retaining every element. This compositional-attention rival tests whether hierarchy, rather than protected absence, is sufficient.","authority_safety":{"affected_parties":["Patrons, including screen-reader, keyboard, low-vision, novice, and expert users","Cataloging and reference staff whose metadata is represented","Libraries accountable for equitable access to holdings"],"decision_authority":"The library discovery product owner may authorize a prototype test with cataloging, public-service, privacy, and accessibility review; production changes remain subject to library governance.","authorized_first_step":"Run a non-production randomized comparison on a bounded set of representative search tasks with up to 30 consenting participants, including assistive-technology users; compare accuracy, time, backtracking, reveal use, field comprehension, and empty-state interpretation.","excluded_actions":["Deleting source metadata","Hiding availability, location, format, uncertainty, error, permission, or safety-relevant information without immediate recovery","Using blankness to conceal poor ranking, missing holdings, exclusions, or system failure","Deploying globally before accessibility and task evidence review"],"halt_rollback":"Halt if essential context is missed, selection accuracy declines, assistive-technology completion worsens, or participants mistake absence for failure. Revert the prototype to the baseline template and restore all deferred fields."}},"negative_tests":{"strongest_counterevidence":"Dense displays may support expert side-by-side comparison, and observed failures may instead arise from poor ranking, ambiguous queries, or missing metadata. If density predicts neither errors nor delay after controlling for those causes, the proposed problem is weak.","analogy_break":"Bibliographic metadata is evidence, not decoration: fields that appear secondary to one patron may be decisive to another. Visual gaps also do not translate automatically into equivalent structure for screen-reader users.","failure_condition":"The design fails if protected space consumes useful viewport area, deferred information becomes undiscoverable, record grouping weakens at zoom or small screens, or essential context is stripped away.","problem_falsifier":"Observation and task analysis show patrons correctly perceive record boundaries and needed fields, while errors are explained primarily by ranking, query formulation, missing records, or misleading metadata rather than attention competition.","intervention_falsifier":"Crowding is verified, but the negative-space prototype produces no meaningful improvement in relevance-selection accuracy or time, or worsens comprehension, accessibility, expert comparison, or recovery relative to both baseline and hierarchy-only rival.","risks":["Minimalism may encode designers' assumptions about which metadata matters.","More vertical space may increase scrolling and reduce cross-record comparison.","Hidden controls or metadata may be inaccessible or undiscoverable.","Empty states may misdescribe suppression, permission, indexing, or network failures.","Testing may underrepresent expert or assistive-technology workflows."]},"null_rationale":null,"classification":{"candidate_kind":"MECHANISM_COMPOSITION","prior_art_status":"UNSEARCHED","evidence_maturity":"HYPOTHESIS"},"revision_change_log":{"revision_kind":"ORIGINAL","prior_problem_id":null,"prior_causal_lever_id":null,"problem_changed":false,"causal_lever_changed":false,"conceptual_changes":[],"operational_changes":[],"repairs_addressed":[]},"confidence":0.84,"generator_notes":"Closed-book structural transfer from the supplied packet. Domain-specific prevalence and effect claims are hypotheses or inferences; prior art was not searched."}