{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CNI346OHTV6XII5SZBVWED4544","short_pith_number":"pith:CNI346OH","canonical_record":{"source":{"id":"1905.05598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-05-08T19:27:22Z","cross_cats_sorted":["cs.CL","cs.IR"],"title_canon_sha256":"7140c35e3b7db045de9b5cc977b249237a46705181bcbd15b5aa3bf2347a7fde","abstract_canon_sha256":"ce1e8dd8fa96c3a6ad9ba508e6dd802bfd692ad4a0a491d8aa10dc7d283f6b3a"},"schema_version":"1.0"},"canonical_sha256":"1351be79c79d7d7423b2c86b620f9de7336a124cb93f76658cf15a809a638a14","source":{"kind":"arxiv","id":"1905.05598","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.05598","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"arxiv_version","alias_value":"1905.05598v1","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.05598","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"pith_short_12","alias_value":"CNI346OHTV6X","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CNI346OHTV6XII5S","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CNI346OH","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CNI346OHTV6XII5SZBVWED4544","target":"record","payload":{"canonical_record":{"source":{"id":"1905.05598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-05-08T19:27:22Z","cross_cats_sorted":["cs.CL","cs.IR"],"title_canon_sha256":"7140c35e3b7db045de9b5cc977b249237a46705181bcbd15b5aa3bf2347a7fde","abstract_canon_sha256":"ce1e8dd8fa96c3a6ad9ba508e6dd802bfd692ad4a0a491d8aa10dc7d283f6b3a"},"schema_version":"1.0"},"canonical_sha256":"1351be79c79d7d7423b2c86b620f9de7336a124cb93f76658cf15a809a638a14","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:14.122995Z","signature_b64":"oqbTrZE1NFucI9UkuF6TrH+NJ40GjoQd5te8ieIExDotX85A0FqAJaKPrjZbFj2xazGwBOPcPQ2S/D3n2rzBDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1351be79c79d7d7423b2c86b620f9de7336a124cb93f76658cf15a809a638a14","last_reissued_at":"2026-05-17T23:46:14.122377Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:14.122377Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.05598","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":"2026-05-17T23:46:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eHCjKFMMIdRK4fPh1wxONDwD19Nb/Gw5rvDxxRQP09dHew9eyQ7knV+MnXfjSfx/m9XuLgRawEQ88sVoie5jCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:25:06.366620Z"},"content_sha256":"0dba3bffb7018eb0467f120892de8b392b80a367d41ec334652d06a4b38ed98a","schema_version":"1.0","event_id":"sha256:0dba3bffb7018eb0467f120892de8b392b80a367d41ec334652d06a4b38ed98a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CNI346OHTV6XII5SZBVWED4544","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Confirmatory Factor Analysis -- A Case study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CL","cs.IR"],"primary_cat":"stat.AP","authors_text":"Rui Portocarrero Sarmento, Vera Costa","submitted_at":"2019-05-08T19:27:22Z","abstract_excerpt":"Confirmatory Factor Analysis (CFA) is a particular form of factor analysis, most commonly used in social research. In confirmatory factor analysis, the researcher first develops a hypothesis about what factors they believe are underlying the used measures and may impose constraints on the model based on these a priori hypotheses. For example, if two factors are accounting for the covariance in the measures, and these factors are unrelated to one another, we can create a model where the correlation between factor X and factor Y is set to zero. Measures could then be obtained to assess how well "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.05598","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":""},"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":"2026-05-17T23:46:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8STOOeqFlTlCRuHCA90Ri+/WD1CMmblkz1aVzat+S9r7qJ/jHXb+vYZLsIdWYH3WSbPdapZCs++9brq9ucfPAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:25:06.367339Z"},"content_sha256":"c85820e95c124d4941e2fc3a0b17a43f1c4aa75e1a74636d30d26767200cfc52","schema_version":"1.0","event_id":"sha256:c85820e95c124d4941e2fc3a0b17a43f1c4aa75e1a74636d30d26767200cfc52"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CNI346OHTV6XII5SZBVWED4544/bundle.json","state_url":"https://pith.science/pith/CNI346OHTV6XII5SZBVWED4544/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CNI346OHTV6XII5SZBVWED4544/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":"2026-06-08T19:25:06Z","links":{"resolver":"https://pith.science/pith/CNI346OHTV6XII5SZBVWED4544","bundle":"https://pith.science/pith/CNI346OHTV6XII5SZBVWED4544/bundle.json","state":"https://pith.science/pith/CNI346OHTV6XII5SZBVWED4544/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CNI346OHTV6XII5SZBVWED4544/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CNI346OHTV6XII5SZBVWED4544","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":"ce1e8dd8fa96c3a6ad9ba508e6dd802bfd692ad4a0a491d8aa10dc7d283f6b3a","cross_cats_sorted":["cs.CL","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-05-08T19:27:22Z","title_canon_sha256":"7140c35e3b7db045de9b5cc977b249237a46705181bcbd15b5aa3bf2347a7fde"},"schema_version":"1.0","source":{"id":"1905.05598","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.05598","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"arxiv_version","alias_value":"1905.05598v1","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.05598","created_at":"2026-05-17T23:46:14Z"},{"alias_kind":"pith_short_12","alias_value":"CNI346OHTV6X","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CNI346OHTV6XII5S","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CNI346OH","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:c85820e95c124d4941e2fc3a0b17a43f1c4aa75e1a74636d30d26767200cfc52","target":"graph","created_at":"2026-05-17T23:46:14Z","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"},"paper":{"abstract_excerpt":"Confirmatory Factor Analysis (CFA) is a particular form of factor analysis, most commonly used in social research. In confirmatory factor analysis, the researcher first develops a hypothesis about what factors they believe are underlying the used measures and may impose constraints on the model based on these a priori hypotheses. For example, if two factors are accounting for the covariance in the measures, and these factors are unrelated to one another, we can create a model where the correlation between factor X and factor Y is set to zero. Measures could then be obtained to assess how well ","authors_text":"Rui Portocarrero Sarmento, Vera Costa","cross_cats":["cs.CL","cs.IR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-05-08T19:27:22Z","title":"Confirmatory Factor Analysis -- A Case study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.05598","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":"sha256:0dba3bffb7018eb0467f120892de8b392b80a367d41ec334652d06a4b38ed98a","target":"record","created_at":"2026-05-17T23:46:14Z","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":"ce1e8dd8fa96c3a6ad9ba508e6dd802bfd692ad4a0a491d8aa10dc7d283f6b3a","cross_cats_sorted":["cs.CL","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-05-08T19:27:22Z","title_canon_sha256":"7140c35e3b7db045de9b5cc977b249237a46705181bcbd15b5aa3bf2347a7fde"},"schema_version":"1.0","source":{"id":"1905.05598","kind":"arxiv","version":1}},"canonical_sha256":"1351be79c79d7d7423b2c86b620f9de7336a124cb93f76658cf15a809a638a14","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1351be79c79d7d7423b2c86b620f9de7336a124cb93f76658cf15a809a638a14","first_computed_at":"2026-05-17T23:46:14.122377Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:14.122377Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oqbTrZE1NFucI9UkuF6TrH+NJ40GjoQd5te8ieIExDotX85A0FqAJaKPrjZbFj2xazGwBOPcPQ2S/D3n2rzBDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:14.122995Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.05598","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dba3bffb7018eb0467f120892de8b392b80a367d41ec334652d06a4b38ed98a","sha256:c85820e95c124d4941e2fc3a0b17a43f1c4aa75e1a74636d30d26767200cfc52"],"state_sha256":"d581602aa64c7a327457a04d3e5cf6d5432b21381a0cf660863c63dd8a6a55d6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TJG4uKWqyK/891rpiVK69pJUiB6WBrS88Id2JE71mgTaGlBFvK9xqvjNGJq9YyzsxW5noPxyQCTlzT1PkoZuAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T19:25:06.371678Z","bundle_sha256":"d406b2d02606f2d351c76923c55f3f9d8a486b471195a342a8af9c8764cefaaf"}}