{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:UPTZR5JXWOAKNE42WDG6YNZ6QH","short_pith_number":"pith:UPTZR5JX","canonical_record":{"source":{"id":"1908.07962","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2019-08-21T16:12:27Z","cross_cats_sorted":["cs.CV","stat.ML"],"title_canon_sha256":"0cba2e7f40b2d05ba36448fb72c44fd99f4bb95c323eef6a1c4cb8e5be2a4101","abstract_canon_sha256":"33d621f64e63b2e7325cedb54f3bf9ffc27bf3bf1d21829e7514d680cc85ce42"},"schema_version":"1.0"},"canonical_sha256":"a3e798f537b380a6939ab0cdec373e81c11305cff6efd8228dc96254b816456f","source":{"kind":"arxiv","id":"1908.07962","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.07962","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"arxiv_version","alias_value":"1908.07962v1","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.07962","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_12","alias_value":"UPTZR5JXWOAK","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_16","alias_value":"UPTZR5JXWOAKNE42","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_8","alias_value":"UPTZR5JX","created_at":"2026-07-04T23:59:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:UPTZR5JXWOAKNE42WDG6YNZ6QH","target":"record","payload":{"canonical_record":{"source":{"id":"1908.07962","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2019-08-21T16:12:27Z","cross_cats_sorted":["cs.CV","stat.ML"],"title_canon_sha256":"0cba2e7f40b2d05ba36448fb72c44fd99f4bb95c323eef6a1c4cb8e5be2a4101","abstract_canon_sha256":"33d621f64e63b2e7325cedb54f3bf9ffc27bf3bf1d21829e7514d680cc85ce42"},"schema_version":"1.0"},"canonical_sha256":"a3e798f537b380a6939ab0cdec373e81c11305cff6efd8228dc96254b816456f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:59:02.832050Z","signature_b64":"hgBWutlqfOvnrR2lrWMNzqWDsYI7asbtQbJ5ZWc6hT6W7YCPfnzrQDtDS/r/Zn0OzJtyTt1epsd+IvVlwnCICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a3e798f537b380a6939ab0cdec373e81c11305cff6efd8228dc96254b816456f","last_reissued_at":"2026-07-04T23:59:02.831520Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:59:02.831520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.07962","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T23:59:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"raqeVDOPpXESLAtGG12Utz15vWt2O16XE/MeSfv5f/+Sezy26IKw0qF09eIzTTCl7Q9tzC/b/DZnBaJykcM7DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T14:05:58.872719Z"},"content_sha256":"199dbf24c12b049423c3255b97d4ce80cb24a1a82bf4235154a4b719e2bd7404","schema_version":"1.0","event_id":"sha256:199dbf24c12b049423c3255b97d4ce80cb24a1a82bf4235154a4b719e2bd7404"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:UPTZR5JXWOAKNE42WDG6YNZ6QH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of perceptual scales using ordinal embedding","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV","stat.ML"],"primary_cat":"cs.LG","authors_text":"Felix Wichmann, Siavash Haghiri, Ulrike von Luxburg","submitted_at":"2019-08-21T16:12:27Z","abstract_excerpt":"In this paper, we address the problem of measuring and analysing sensation, the subjective magnitude of one's experience. We do this in the context of the method of triads: the sensation of the stimulus is evaluated via relative judgments of the form: \"Is stimulus S_i more similar to stimulus S_j or to stimulus S_k?\". We propose to use ordinal embedding methods from machine learning to estimate the scaling function from the relative judgments. We review two relevant and well-known methods in psychophysics which are partially applicable in our setting: non-metric multi-dimensional scaling (NMDS"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.07962","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.07962/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T23:59:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aG/vFmoHmbG24joy+ZOYsdnZh0wJcJpoCw4nMNcslbRb0nfA95YrjSWADQ9k/WyLofrOX/om0IXPVUF5D1rcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T14:05:58.873237Z"},"content_sha256":"91fc2b85921b0f5716cd9c011dbde79c05fb26e107d0c4b3f59c4e2a41c11251","schema_version":"1.0","event_id":"sha256:91fc2b85921b0f5716cd9c011dbde79c05fb26e107d0c4b3f59c4e2a41c11251"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/bundle.json","state_url":"https://pith.science/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-21T14:05:58Z","links":{"resolver":"https://pith.science/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH","bundle":"https://pith.science/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/bundle.json","state":"https://pith.science/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UPTZR5JXWOAKNE42WDG6YNZ6QH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UPTZR5JXWOAKNE42WDG6YNZ6QH","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"33d621f64e63b2e7325cedb54f3bf9ffc27bf3bf1d21829e7514d680cc85ce42","cross_cats_sorted":["cs.CV","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2019-08-21T16:12:27Z","title_canon_sha256":"0cba2e7f40b2d05ba36448fb72c44fd99f4bb95c323eef6a1c4cb8e5be2a4101"},"schema_version":"1.0","source":{"id":"1908.07962","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.07962","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"arxiv_version","alias_value":"1908.07962v1","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.07962","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_12","alias_value":"UPTZR5JXWOAK","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_16","alias_value":"UPTZR5JXWOAKNE42","created_at":"2026-07-04T23:59:02Z"},{"alias_kind":"pith_short_8","alias_value":"UPTZR5JX","created_at":"2026-07-04T23:59:02Z"}],"graph_snapshots":[{"event_id":"sha256:91fc2b85921b0f5716cd9c011dbde79c05fb26e107d0c4b3f59c4e2a41c11251","target":"graph","created_at":"2026-07-04T23:59:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.07962/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we address the problem of measuring and analysing sensation, the subjective magnitude of one's experience. We do this in the context of the method of triads: the sensation of the stimulus is evaluated via relative judgments of the form: \"Is stimulus S_i more similar to stimulus S_j or to stimulus S_k?\". We propose to use ordinal embedding methods from machine learning to estimate the scaling function from the relative judgments. We review two relevant and well-known methods in psychophysics which are partially applicable in our setting: non-metric multi-dimensional scaling (NMDS","authors_text":"Felix Wichmann, Siavash Haghiri, Ulrike von Luxburg","cross_cats":["cs.CV","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2019-08-21T16:12:27Z","title":"Estimation of perceptual scales using ordinal embedding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.07962","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:199dbf24c12b049423c3255b97d4ce80cb24a1a82bf4235154a4b719e2bd7404","target":"record","created_at":"2026-07-04T23:59:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"33d621f64e63b2e7325cedb54f3bf9ffc27bf3bf1d21829e7514d680cc85ce42","cross_cats_sorted":["cs.CV","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2019-08-21T16:12:27Z","title_canon_sha256":"0cba2e7f40b2d05ba36448fb72c44fd99f4bb95c323eef6a1c4cb8e5be2a4101"},"schema_version":"1.0","source":{"id":"1908.07962","kind":"arxiv","version":1}},"canonical_sha256":"a3e798f537b380a6939ab0cdec373e81c11305cff6efd8228dc96254b816456f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a3e798f537b380a6939ab0cdec373e81c11305cff6efd8228dc96254b816456f","first_computed_at":"2026-07-04T23:59:02.831520Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:59:02.831520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hgBWutlqfOvnrR2lrWMNzqWDsYI7asbtQbJ5ZWc6hT6W7YCPfnzrQDtDS/r/Zn0OzJtyTt1epsd+IvVlwnCICQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:59:02.832050Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.07962","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:199dbf24c12b049423c3255b97d4ce80cb24a1a82bf4235154a4b719e2bd7404","sha256:91fc2b85921b0f5716cd9c011dbde79c05fb26e107d0c4b3f59c4e2a41c11251"],"state_sha256":"e3f45dc15f1200ae0981987943af8317832e7a197869f1cc1788847405210233"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wy3sTR63pc5iTl/Oh5A7u26WEumD+kYusyPmJGlLMODty76DnxKwugKn6zgruTkizWTEnnr+nDt8EMlBWp7qAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T14:05:58.878159Z","bundle_sha256":"05e69f080dfd34d6b70d4deb203ae4b3ddb10dfdfc3a2915a9155b4a94449c9c"}}