{"citations":{"source_mix":{"company_owned":12,"independent":16,"unclear":4},"sources_referenced_by_questions":0,"support_mix":{"direct":26,"partial":5},"total_sources":32,"unique_domain_count":24},"claims":[{"claim_id":"claim-001","confidence":"verified","observed_at":"2026-09-27","platform_support":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"predicate":"platforms_analyzed","qualifier":"valid included platform responses","subject":"Best Perch Stairlifts for Narrow Stairs","unit":"platforms","value":7},{"claim_id":"claim-002","confidence":"verified","observed_at":"2026-09-27","platform_support":["google","grok","kimi","openai","perplexity"],"predicate":"final_consensus_rank","qualifier":"Perching Seat for Tight Staircases","subject":"Handicare 1000 Perch","unit":"rank","value":2},{"claim_id":"claim-003","confidence":"verified","observed_at":"2026-09-27","platform_support":["google","grok","kimi","openai","perplexity"],"predicate":"platform_mentions","qualifier":"out of 7","subject":"Handicare 1000 Perch","unit":"platforms","value":5},{"claim_id":"claim-004","confidence":"verified","observed_at":"2026-09-27","platform_support":["grok","google"],"predicate":"fit_rating_count","qualifier":"strong","subject":"Handicare 1000 Perch","unit":"platforms","value":2},{"claim_id":"claim-005","confidence":"verified","observed_at":"2026-09-27","platform_support":["openai","anthropic","perplexity","kimi"],"predicate":"fit_rating_count","qualifier":"good","subject":"Handicare 1000 Perch","unit":"platforms","value":4},{"claim_id":"claim-006","confidence":"verified","observed_at":"2026-09-27","platform_support":["deepseek"],"predicate":"fit_rating_count","qualifier":"uncertain","subject":"Handicare 1000 Perch","unit":"platforms","value":1}],"content_scope":"aggregated facts, computed metrics, and retrieval summaries","entities":[{"average_rank":1.8,"best_rank":1,"entity_id":"entity-001","entity_type":"company","final_rank":2,"name":"Handicare 1000 Perch","platform_mentions":5,"platform_share":0.7142857142857143}],"identity":{"dataset_url":"https://aginginplaceindex.com/datasets/stairlifts/perching-seat-for-tight-staircases/handicare-1000-perch.json","page_url":"https://aginginplaceindex.com/stairlifts/perching-seat-for-tight-staircases/handicare-1000-perch","report_type":"fit_review","study_id":"AIPI-STUDY-34B7D1F7997A","title":"Handicare 1000 Perch Review for Narrow Stairs"},"limitations":["Use the run researchdate as the study date. Platform-reported dates are provenance metadata and do not independently prove freshness.","All included platforms evaluated fit, but platformmentions counts only platforms that named the entity during ranking discovery.","Do not resolve conflicting product names, pricing, or capabilities by guessing; describe the conflict and tell buyers what to verify.","The supplied URLs were collected from platform responses and were not independently validated by the writer stage.","Platform-reported research dates differ from the authoritative run date; disclose this as a methodology limitation.","The deterministic identity audit contains qualification notes that must be disclosed where relevant.","Citations are platform-reported evidence, not independently verified facts. No-search model claims require explicit verification before being described as current facts."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Aging in Place Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-09-27 14:28:51.513164+00","research_date":"2026-09-27","source_snapshot_sha256":"33b0fb57d16bb615b8ff3e8a3677c6a2db472805799763f3cc6cb0003c8ca38c","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":8,"qualified_finalists":5,"ranking_unit":"Perch stairlift model and manufacturer"},"schema_version":4,"summary":"The Handicare 1000 Perch is a good fit for homeowners with narrow, straight indoor staircases who need a semi-standing perch seat rather than a full seated ride. Five of seven platforms named it during the ranking stage (71.4% of included platform responses), with an average listed rank of 1.8 and a best rank of 1. Its strongest advantage is a shallow 12.59-inch seat depth and reported 4.52-inch track intrusion, which preserve stair width. The main limitation is verification: the published Perch configuration is cited at 250 pounds by one platform and 300 pounds by others, the perch seat…","target_buyer":"Homeowners with narrow staircases where a traditional seated stairlift would block access or create clearance issues","topic":{"base_category":"Stairlifts","category_criteria":["Minimum staircase width","perch seat angle","folded footprint","rail profile","knee clearance","swivel/parking options","safety sensors","installation requirements"],"geography":"United States","slug":"best-perch-stairlifts-for-narrow-stairs","title":"Best Perch Stairlifts for Narrow Stairs","use_case":"Perching Seat for Tight Staircases"}}