{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BWRJ2LFNM234WIMNH6UV7HKJDA","short_pith_number":"pith:BWRJ2LFN","canonical_record":{"source":{"id":"1811.11440","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2018-11-28T08:34:55Z","cross_cats_sorted":[],"title_canon_sha256":"3ae51670a7f6d7655c81f63c2c6849bd99bc73b0228e07a72e81496eb6ed6244","abstract_canon_sha256":"caebc46b69c233650ef3ea817b91e7ab75b450b91c7e2bd365f65d621eb9dcf3"},"schema_version":"1.0"},"canonical_sha256":"0da29d2cad66b7cb218d3fa95f9d4918033df742712c6c7001f3ccc4f4761207","source":{"kind":"arxiv","id":"1811.11440","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.11440","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"arxiv_version","alias_value":"1811.11440v2","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.11440","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"pith_short_12","alias_value":"BWRJ2LFNM234","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BWRJ2LFNM234WIMN","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BWRJ2LFN","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BWRJ2LFNM234WIMNH6UV7HKJDA","target":"record","payload":{"canonical_record":{"source":{"id":"1811.11440","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2018-11-28T08:34:55Z","cross_cats_sorted":[],"title_canon_sha256":"3ae51670a7f6d7655c81f63c2c6849bd99bc73b0228e07a72e81496eb6ed6244","abstract_canon_sha256":"caebc46b69c233650ef3ea817b91e7ab75b450b91c7e2bd365f65d621eb9dcf3"},"schema_version":"1.0"},"canonical_sha256":"0da29d2cad66b7cb218d3fa95f9d4918033df742712c6c7001f3ccc4f4761207","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:43.685528Z","signature_b64":"mE4l4G+fKnxm6i1dKbK0/nN1tDC7Y1xYsJ+I+k6jD+SiWw6Y9+gFQSSK3455ipF1mE39XlrzNn+YklJ5oASsCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0da29d2cad66b7cb218d3fa95f9d4918033df742712c6c7001f3ccc4f4761207","last_reissued_at":"2026-05-17T23:51:43.685026Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:43.685026Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.11440","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BQjdk5XnyZJP7EB8TimLzovLhhAgkMXxIo9nNgUCszMXP35B4jiwQ1wyr5k4YQY3dmTGfsLe2VcnZIneSAAeAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:23:19.451435Z"},"content_sha256":"80bf33f4cebb5ad58762a4815ddd40cf5e00426b94ff6e19d4ea69543c92017c","schema_version":"1.0","event_id":"sha256:80bf33f4cebb5ad58762a4815ddd40cf5e00426b94ff6e19d4ea69543c92017c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BWRJ2LFNM234WIMNH6UV7HKJDA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A new correlation coefficient between categorical, ordinal and interval variables with Pearson characteristics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.ME","authors_text":"H. Snoek, M. Baak, R. Koopman, S. Klous","submitted_at":"2018-11-28T08:34:55Z","abstract_excerpt":"A prescription is presented for a new and practical correlation coefficient, $\\phi_K$, based on several refinements to Pearson's hypothesis test of independence of two variables. The combined features of $\\phi_K$ form an advantage over existing coefficients. First, it works consistently between categorical, ordinal and interval variables. Second, it captures non-linear dependency. Third, it reverts to the Pearson correlation coefficient in case of a bi-variate normal input distribution. These are useful features when studying the correlation between variables with mixed types. Particular empha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.11440","kind":"arxiv","version":2},"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":"2026-05-17T23:51:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k8cNP9KnqAUK/dpC2yYt9Id1T5LKU7FQXSGWCkg3uQo+D9Ee3ckLyX99XM3YM40Te0sKpNwtFr5pV/KopvuRCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:23:19.452211Z"},"content_sha256":"2fd10eab7e65f7b6bf3109d28ea218aa0c1a4fd58c6c6fcb9351501d30665214","schema_version":"1.0","event_id":"sha256:2fd10eab7e65f7b6bf3109d28ea218aa0c1a4fd58c6c6fcb9351501d30665214"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/bundle.json","state_url":"https://pith.science/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/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":"2026-06-09T08:23:19Z","links":{"resolver":"https://pith.science/pith/BWRJ2LFNM234WIMNH6UV7HKJDA","bundle":"https://pith.science/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/bundle.json","state":"https://pith.science/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BWRJ2LFNM234WIMNH6UV7HKJDA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BWRJ2LFNM234WIMNH6UV7HKJDA","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":"caebc46b69c233650ef3ea817b91e7ab75b450b91c7e2bd365f65d621eb9dcf3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2018-11-28T08:34:55Z","title_canon_sha256":"3ae51670a7f6d7655c81f63c2c6849bd99bc73b0228e07a72e81496eb6ed6244"},"schema_version":"1.0","source":{"id":"1811.11440","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.11440","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"arxiv_version","alias_value":"1811.11440v2","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.11440","created_at":"2026-05-17T23:51:43Z"},{"alias_kind":"pith_short_12","alias_value":"BWRJ2LFNM234","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BWRJ2LFNM234WIMN","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BWRJ2LFN","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:2fd10eab7e65f7b6bf3109d28ea218aa0c1a4fd58c6c6fcb9351501d30665214","target":"graph","created_at":"2026-05-17T23:51:43Z","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":"A prescription is presented for a new and practical correlation coefficient, $\\phi_K$, based on several refinements to Pearson's hypothesis test of independence of two variables. The combined features of $\\phi_K$ form an advantage over existing coefficients. First, it works consistently between categorical, ordinal and interval variables. Second, it captures non-linear dependency. Third, it reverts to the Pearson correlation coefficient in case of a bi-variate normal input distribution. These are useful features when studying the correlation between variables with mixed types. Particular empha","authors_text":"H. Snoek, M. Baak, R. Koopman, S. Klous","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2018-11-28T08:34:55Z","title":"A new correlation coefficient between categorical, ordinal and interval variables with Pearson characteristics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.11440","kind":"arxiv","version":2},"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":"sha256:80bf33f4cebb5ad58762a4815ddd40cf5e00426b94ff6e19d4ea69543c92017c","target":"record","created_at":"2026-05-17T23:51:43Z","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":"caebc46b69c233650ef3ea817b91e7ab75b450b91c7e2bd365f65d621eb9dcf3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2018-11-28T08:34:55Z","title_canon_sha256":"3ae51670a7f6d7655c81f63c2c6849bd99bc73b0228e07a72e81496eb6ed6244"},"schema_version":"1.0","source":{"id":"1811.11440","kind":"arxiv","version":2}},"canonical_sha256":"0da29d2cad66b7cb218d3fa95f9d4918033df742712c6c7001f3ccc4f4761207","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0da29d2cad66b7cb218d3fa95f9d4918033df742712c6c7001f3ccc4f4761207","first_computed_at":"2026-05-17T23:51:43.685026Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:43.685026Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mE4l4G+fKnxm6i1dKbK0/nN1tDC7Y1xYsJ+I+k6jD+SiWw6Y9+gFQSSK3455ipF1mE39XlrzNn+YklJ5oASsCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:43.685528Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.11440","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:80bf33f4cebb5ad58762a4815ddd40cf5e00426b94ff6e19d4ea69543c92017c","sha256:2fd10eab7e65f7b6bf3109d28ea218aa0c1a4fd58c6c6fcb9351501d30665214"],"state_sha256":"c7a330bbf9dbb377d193809db0a738680298072bfdbe48206c7135e4ad3b1b51"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"651ns/IKA+Mij7sxI5+R0+zgGIw0G/oYh+rmmKqymaLea2yedPjIADHhqYVTVH2B30P+iMaUmXTjuVJNsmmXBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:23:19.455884Z","bundle_sha256":"6744412fbdd9ed96aad8e07c92438787039dfa46b38ba3eeae8519c022a2d18b"}}