{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HT4UHRG353NO6R7YN42JF3FI6P","short_pith_number":"pith:HT4UHRG3","canonical_record":{"source":{"id":"1604.03019","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-04-11T16:19:16Z","cross_cats_sorted":["cs.HC","stat.AP"],"title_canon_sha256":"fc61720050bfe6342b1028b760d0e77ced992105fddc5792637e07d3aed45f16","abstract_canon_sha256":"889ff17160766e38c55b1cc4ac5c82106b895144c5060721185d5f9515444108"},"schema_version":"1.0"},"canonical_sha256":"3cf943c4dbeedaef47f86f3492eca8f3c61e30e40b340c945a45e2594d464225","source":{"kind":"arxiv","id":"1604.03019","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.03019","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"arxiv_version","alias_value":"1604.03019v3","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.03019","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"pith_short_12","alias_value":"HT4UHRG353NO","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HT4UHRG353NO6R7Y","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HT4UHRG3","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HT4UHRG353NO6R7YN42JF3FI6P","target":"record","payload":{"canonical_record":{"source":{"id":"1604.03019","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-04-11T16:19:16Z","cross_cats_sorted":["cs.HC","stat.AP"],"title_canon_sha256":"fc61720050bfe6342b1028b760d0e77ced992105fddc5792637e07d3aed45f16","abstract_canon_sha256":"889ff17160766e38c55b1cc4ac5c82106b895144c5060721185d5f9515444108"},"schema_version":"1.0"},"canonical_sha256":"3cf943c4dbeedaef47f86f3492eca8f3c61e30e40b340c945a45e2594d464225","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:50.979114Z","signature_b64":"H4z7857BTIn/gJ1zobT4g5pnfd/Ga6kfSIePooPcXbi/hb1kzaMHXV2v4IcNel3yYI9KAzYC+dDXEItKo45TDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3cf943c4dbeedaef47f86f3492eca8f3c61e30e40b340c945a45e2594d464225","last_reissued_at":"2026-05-18T00:53:50.978655Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:50.978655Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.03019","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:53:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T0jwZD2as3eqmkAjcFkNOptMvZb9ZKPPEfLMhInG6qwuqR6/GJVdEWFnK/Fl29CcFGCtVy+2GD721i/UXS36DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:55:00.525560Z"},"content_sha256":"b8c8ea68934bbd09ac4f940ffed8d63a04b3a8d2242b1ddcc30ae14feb5ea976","schema_version":"1.0","event_id":"sha256:b8c8ea68934bbd09ac4f940ffed8d63a04b3a8d2242b1ddcc30ae14feb5ea976"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HT4UHRG353NO6R7YN42JF3FI6P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"EEG in the classroom: Synchronised neural recordings during video presentation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.HC","stat.AP"],"primary_cat":"q-bio.NC","authors_text":"Andreas Trier Poulsen, Jacek Dmochowski, Lars Kai Hansen, Lucas C. Parra, Simon Kamronn","submitted_at":"2016-04-11T16:19:16Z","abstract_excerpt":"We performed simultaneous recordings of electroencephalography (EEG) from multiple students in a classroom, and measured the inter-subject correlation (ISC) of activity evoked by a common video stimulus. The neural reliability, as quantified by ISC, has been linked to engagement and attentional modulation in earlier studies that used high-grade equipment in laboratory settings. Here we reproduce many of the results from these studies using portable low-cost equipment, focusing on the robustness of using ISC for subjects experiencing naturalistic stimuli. The present data shows that stimulus-ev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.03019","kind":"arxiv","version":3},"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":"2026-05-18T00:53:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LzcCqqsanV78bL4m3pQ0DeiPHrjlBOxLTqSXqcPXI+euHQscAwUjy98RD+GCCQndVEpKfkrv0C8VDM2BRa1TBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:55:00.525909Z"},"content_sha256":"90c798143d5187976ca0ba1f38f1fa83adc5de231007427f7ffecf2b68086667","schema_version":"1.0","event_id":"sha256:90c798143d5187976ca0ba1f38f1fa83adc5de231007427f7ffecf2b68086667"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HT4UHRG353NO6R7YN42JF3FI6P/bundle.json","state_url":"https://pith.science/pith/HT4UHRG353NO6R7YN42JF3FI6P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HT4UHRG353NO6R7YN42JF3FI6P/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":"2026-05-28T01:55:00Z","links":{"resolver":"https://pith.science/pith/HT4UHRG353NO6R7YN42JF3FI6P","bundle":"https://pith.science/pith/HT4UHRG353NO6R7YN42JF3FI6P/bundle.json","state":"https://pith.science/pith/HT4UHRG353NO6R7YN42JF3FI6P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HT4UHRG353NO6R7YN42JF3FI6P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HT4UHRG353NO6R7YN42JF3FI6P","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":"889ff17160766e38c55b1cc4ac5c82106b895144c5060721185d5f9515444108","cross_cats_sorted":["cs.HC","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-04-11T16:19:16Z","title_canon_sha256":"fc61720050bfe6342b1028b760d0e77ced992105fddc5792637e07d3aed45f16"},"schema_version":"1.0","source":{"id":"1604.03019","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.03019","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"arxiv_version","alias_value":"1604.03019v3","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.03019","created_at":"2026-05-18T00:53:50Z"},{"alias_kind":"pith_short_12","alias_value":"HT4UHRG353NO","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HT4UHRG353NO6R7Y","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HT4UHRG3","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:90c798143d5187976ca0ba1f38f1fa83adc5de231007427f7ffecf2b68086667","target":"graph","created_at":"2026-05-18T00:53:50Z","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":"We performed simultaneous recordings of electroencephalography (EEG) from multiple students in a classroom, and measured the inter-subject correlation (ISC) of activity evoked by a common video stimulus. The neural reliability, as quantified by ISC, has been linked to engagement and attentional modulation in earlier studies that used high-grade equipment in laboratory settings. Here we reproduce many of the results from these studies using portable low-cost equipment, focusing on the robustness of using ISC for subjects experiencing naturalistic stimuli. The present data shows that stimulus-ev","authors_text":"Andreas Trier Poulsen, Jacek Dmochowski, Lars Kai Hansen, Lucas C. Parra, Simon Kamronn","cross_cats":["cs.HC","stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-04-11T16:19:16Z","title":"EEG in the classroom: Synchronised neural recordings during video presentation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.03019","kind":"arxiv","version":3},"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:b8c8ea68934bbd09ac4f940ffed8d63a04b3a8d2242b1ddcc30ae14feb5ea976","target":"record","created_at":"2026-05-18T00:53:50Z","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":"889ff17160766e38c55b1cc4ac5c82106b895144c5060721185d5f9515444108","cross_cats_sorted":["cs.HC","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2016-04-11T16:19:16Z","title_canon_sha256":"fc61720050bfe6342b1028b760d0e77ced992105fddc5792637e07d3aed45f16"},"schema_version":"1.0","source":{"id":"1604.03019","kind":"arxiv","version":3}},"canonical_sha256":"3cf943c4dbeedaef47f86f3492eca8f3c61e30e40b340c945a45e2594d464225","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cf943c4dbeedaef47f86f3492eca8f3c61e30e40b340c945a45e2594d464225","first_computed_at":"2026-05-18T00:53:50.978655Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:50.978655Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H4z7857BTIn/gJ1zobT4g5pnfd/Ga6kfSIePooPcXbi/hb1kzaMHXV2v4IcNel3yYI9KAzYC+dDXEItKo45TDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:50.979114Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.03019","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8c8ea68934bbd09ac4f940ffed8d63a04b3a8d2242b1ddcc30ae14feb5ea976","sha256:90c798143d5187976ca0ba1f38f1fa83adc5de231007427f7ffecf2b68086667"],"state_sha256":"c407afc0fffce4af5bd7bce803dc4f74d7b9df97b2a170c30b87d6cd01b6ad92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ci7TwdU8ozs3cCZerUH2cMFWhoLTx8UVtyteqEHcK6vggtd0QX9W59FjG1hhYnC1US/cIn3sJAGCyG7yxFJvDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T01:55:00.527804Z","bundle_sha256":"a820fbc79397b92f3701289be4eb79e37805243e9142cb4e59f8254a80abfdc0"}}