{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:F3IQ6EEFQ3PCICXJYQLTPMMJEI","short_pith_number":"pith:F3IQ6EEF","canonical_record":{"source":{"id":"1612.03649","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-12-12T12:42:35Z","cross_cats_sorted":[],"title_canon_sha256":"56eacecf3b8c7e0bc2999779bc65325174c84155bc03eb35ea01d76cc56e38e5","abstract_canon_sha256":"95d844cbac6c463c6b41411901b9dfd067c2e9277d69e047dd50aaecaaa27c92"},"schema_version":"1.0"},"canonical_sha256":"2ed10f108586de240ae9c41737b189221f46ba543c41f5d5ad998b8917715069","source":{"kind":"arxiv","id":"1612.03649","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03649","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03649v2","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03649","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"pith_short_12","alias_value":"F3IQ6EEFQ3PC","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F3IQ6EEFQ3PCICXJ","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F3IQ6EEF","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:F3IQ6EEFQ3PCICXJYQLTPMMJEI","target":"record","payload":{"canonical_record":{"source":{"id":"1612.03649","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-12-12T12:42:35Z","cross_cats_sorted":[],"title_canon_sha256":"56eacecf3b8c7e0bc2999779bc65325174c84155bc03eb35ea01d76cc56e38e5","abstract_canon_sha256":"95d844cbac6c463c6b41411901b9dfd067c2e9277d69e047dd50aaecaaa27c92"},"schema_version":"1.0"},"canonical_sha256":"2ed10f108586de240ae9c41737b189221f46ba543c41f5d5ad998b8917715069","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:44:51.916751Z","signature_b64":"pZxVK5B+p3YjouOB7Ue0RBLPLlx/5piBFIe1Glkw4OkvFz0HNa9+1BFfTXGtxiL43fLHCIhxioBV/9z81NNRAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ed10f108586de240ae9c41737b189221f46ba543c41f5d5ad998b8917715069","last_reissued_at":"2026-05-18T00:44:51.916102Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:44:51.916102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.03649","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":"2026-05-18T00:44:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pfx3cYJOzLTO81I4eEjweIlyfPoQyGkk/uBMjlCHGEl41gtpAt7EomU/xFgUWpw2YSmgVnjTps92y0KyZb7uDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T10:00:17.048238Z"},"content_sha256":"2ffad85b7daf45c8749f07de638e89cae75b8fb3e9bc75303f02ce89f22c7e50","schema_version":"1.0","event_id":"sha256:2ffad85b7daf45c8749f07de638e89cae75b8fb3e9bc75303f02ce89f22c7e50"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:F3IQ6EEFQ3PCICXJYQLTPMMJEI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hierarchical searching in episodic memory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.NC","authors_text":"Francesco Fumarola","submitted_at":"2016-12-12T12:42:35Z","abstract_excerpt":"An analysis of free-recall datasets from two independent experiments allows to identify two anomalous instances of non-monotonicity in free recall: a maximum in the dependence of the inter-response intervals on the serial-position lags, and a minimum in the rate of contiguous recall near the beginning of the recall process. Both effects, it is argued, may stem from a hierarchical search protocol in the space of memories. An elementary random-walk model on binary strings is used to test this hypothesis."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03649","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":"2026-05-18T00:44:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S0kzz0UC9PBvPgzJ6x194Aovxxg24UNZ6q3wWqdOhv2AkGVXFb4CnVojLthg8wAYCCoG7z1c1/VY3DU2TV1uAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T10:00:17.048607Z"},"content_sha256":"e5abee26b4a1ab2884d474d81406d1c95609a70188a5e5c360a07137ab2631f8","schema_version":"1.0","event_id":"sha256:e5abee26b4a1ab2884d474d81406d1c95609a70188a5e5c360a07137ab2631f8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/bundle.json","state_url":"https://pith.science/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/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":"2026-06-05T10:00:17Z","links":{"resolver":"https://pith.science/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI","bundle":"https://pith.science/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/bundle.json","state":"https://pith.science/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F3IQ6EEFQ3PCICXJYQLTPMMJEI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:F3IQ6EEFQ3PCICXJYQLTPMMJEI","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":"95d844cbac6c463c6b41411901b9dfd067c2e9277d69e047dd50aaecaaa27c92","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-12-12T12:42:35Z","title_canon_sha256":"56eacecf3b8c7e0bc2999779bc65325174c84155bc03eb35ea01d76cc56e38e5"},"schema_version":"1.0","source":{"id":"1612.03649","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03649","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03649v2","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03649","created_at":"2026-05-18T00:44:51Z"},{"alias_kind":"pith_short_12","alias_value":"F3IQ6EEFQ3PC","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F3IQ6EEFQ3PCICXJ","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F3IQ6EEF","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:e5abee26b4a1ab2884d474d81406d1c95609a70188a5e5c360a07137ab2631f8","target":"graph","created_at":"2026-05-18T00:44:51Z","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":"An analysis of free-recall datasets from two independent experiments allows to identify two anomalous instances of non-monotonicity in free recall: a maximum in the dependence of the inter-response intervals on the serial-position lags, and a minimum in the rate of contiguous recall near the beginning of the recall process. Both effects, it is argued, may stem from a hierarchical search protocol in the space of memories. An elementary random-walk model on binary strings is used to test this hypothesis.","authors_text":"Francesco Fumarola","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-12-12T12:42:35Z","title":"Hierarchical searching in episodic memory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03649","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":"sha256:2ffad85b7daf45c8749f07de638e89cae75b8fb3e9bc75303f02ce89f22c7e50","target":"record","created_at":"2026-05-18T00:44:51Z","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":"95d844cbac6c463c6b41411901b9dfd067c2e9277d69e047dd50aaecaaa27c92","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-12-12T12:42:35Z","title_canon_sha256":"56eacecf3b8c7e0bc2999779bc65325174c84155bc03eb35ea01d76cc56e38e5"},"schema_version":"1.0","source":{"id":"1612.03649","kind":"arxiv","version":2}},"canonical_sha256":"2ed10f108586de240ae9c41737b189221f46ba543c41f5d5ad998b8917715069","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ed10f108586de240ae9c41737b189221f46ba543c41f5d5ad998b8917715069","first_computed_at":"2026-05-18T00:44:51.916102Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:44:51.916102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pZxVK5B+p3YjouOB7Ue0RBLPLlx/5piBFIe1Glkw4OkvFz0HNa9+1BFfTXGtxiL43fLHCIhxioBV/9z81NNRAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:44:51.916751Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.03649","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ffad85b7daf45c8749f07de638e89cae75b8fb3e9bc75303f02ce89f22c7e50","sha256:e5abee26b4a1ab2884d474d81406d1c95609a70188a5e5c360a07137ab2631f8"],"state_sha256":"3c44482b864b3ad3b81bb18073e8e76b8ef0653c0facc9cb256cb820c83c2c74"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wmpnWOuX+/JsiJKjH8VNdxIfxRR+kLlvbFSOFcSoGO0MZNmahAAKHFciXEXcS/ztTeFMxLh/qXSXjZyJNiYbCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T10:00:17.059527Z","bundle_sha256":"14c9fea9ee6a567ab6eeab922ac8836273219fabc0cee3326e201d38e31072f7"}}