{"success":true,"database":"eegdash","data":{"_id":"6953f4249276ef1ee07a33e8","dataset_id":"ds005429","associated_paper_doi":null,"authors":["Renate Rutiku","Chiara Fiscone","Marcello Massimini","Simone Sarasso"],"bids_version":"1.8","contact_info":["Renate Rutiku"],"contributing_labs":null,"data_processed":false,"dataset_doi":"doi:10.18112/openneuro.ds005429.v1.0.0","datatypes":["eeg"],"demographics":{"subjects_count":15,"ages":[20,19,25,23,25,26,23,32,24,26,49,40,28],"age_min":19,"age_max":49,"age_mean":27.692307692307693,"species":null,"sex_distribution":{"m":6,"f":8},"handedness_distribution":{"r":8,"l":3}},"experimental_modalities":null,"external_links":{"source_url":"https://openneuro.org/datasets/ds005429","osf_url":null,"github_url":null,"paper_url":null},"funding":[],"ingestion_fingerprint":"c48d9ee13beeaf47da9a0d3bc1bc7a4b4705ad3640dd2482ca093df7d49682f1","license":"CC0","n_contributing_labs":null,"name":"Auditory oddball comparison (Optimum-1, Learning-oddball, and the local–global paradigm)","readme":"## Introduction\nThis is the raw EEG data used in:\nRutiku, R., Fiscone, C., Massimini, M., & Sarasso, S. (2024). Assessing mismatch negativity (MMN) and P3b within‐individual sensitivity — A comparison between the local–global paradigm and two specialized oddball sequences. European Journal of Neuroscience, 59(5), 842-859.\n### What's in this dataset\nEach participant (n=15) completed three different auditory oddball sequences: the Optimum-1 for MMN, the learning-oddball for P3b, and the local–global paradigm for the local and global effect. The tasks are formatted as different sessions but they were all recorded consecutively within one EEG experiment (order differed between participants). The local-global sequence was recorded in two separate EEG files (except for participant 5; see below for exception notes). Note that whereas the .vmrk files contain the original triggers for each recording, the _events files contain the correct event samples used in the analysis (in the fieldtrip cfg.trl format). It namely sometimes happened that some triggers were skipped by the recording system and these triggers needed to be interpolated using the event timestamps from the psychtoolbox output that was used to run the stimulation sequence (see below). Note also that the local-global sequence contains triggers for every single sound, but trials should be cut only for the first sound of every quintlet. The _events files already take that into account.\n| Subject | Session      | Run   |\n| ------- |--------------|-------|\n| sub-01  | ses-MMN      |       |\n| sub-01  | ses-P3b      |       |\n| sub-01  | ses-LGeffect | run-1 |\n| sub-01  | ses-LGeffect | run-2 |\n### Auditory stimulation specs\nThe stimulation sequence information is provided in the original .mat format in the sourcedata folder.\nThere are two files for each sequence: a file containing the sound definitions (_stimulation_SEQUENCE) and a file containing the timestamps for each sound (_critical_events).\nThe code used to run these sequences is included in the paradigms folder.\n### Exceptions\nParticipant 13 was recorded with 5000 Hz EEG sampling rate whereas all other participants were recorded with 2500 Hz EEG sampling rate.\nParticipants 13, 14, and 15 were recorded chronologically first and they have slightly more trials for the oddball sequences. After inspecting their data, it was decided that trial numbers can be reduced for the rest of the participants in order to keep the recording time as short as possible while still having good sensitivity for the effects of interest.\nParticipant 5 has three runs for the local-global task due to a need for an extra break by the participant.","recording_modality":["eeg"],"senior_author":"Simone Sarasso","sessions":["LGeffect","MMN","P3b"],"size_bytes":17684554701,"source":"openneuro","study_design":null,"study_domain":null,"tasks":["LearningOddball","LocalGlobal","Optimum1"],"timestamps":{"digested_at":"2026-04-22T12:27:46.167400+00:00","dataset_created_at":"2024-08-26T14:54:36.161Z","dataset_modified_at":"2024-08-30T05:31:09.000Z"},"total_files":61,"storage":{"backend":"s3","base":"s3://openneuro.org/ds005429","raw_key":"dataset_description.json","dep_keys":["CHANGES","README","participants.tsv"]},"tagger_meta":{"config_hash":"4a051be509a0e3d0","metadata_hash":"88acc6b6b4a9f420","model":"openai/gpt-5.2","tagged_at":"2026-01-20T17:55:24.464651+00:00"},"tags":{"pathology":["Healthy"],"modality":["Auditory"],"type":["Attention"],"confidence":{"pathology":0.6,"modality":0.85,"type":0.7},"reasoning":{"few_shot_analysis":"Most similar few-shot paradigm-wise is the \"Cross-modal Oddball Task\" example, which shows that an oddball paradigm is treated as an event-related/cognitive task (not resting-state or motor), and that the Pathology label is driven by the recruited clinical group (Parkinson's in that case). Another relevant convention is the \"EEG: Three-Stim Auditory Oddball and Rest in Acute and Chronic TBI\" example, which confirms that classic oddball designs are categorized by the stimulus modality (Auditory) and a cognitive-type label rather than task mechanics. In the current dataset there is no stated clinical recruitment, so by convention it should be labeled as a normative cohort (Healthy) rather than a clinical category.","metadata_analysis":"Key dataset facts (quoted):\n1) Paradigm: \"Each participant (n=15) completed three different auditory oddball sequences\"\n2) Auditory stimulus/task variants: \"the Optimum-1 for MMN, the learning-oddball for P3b, and the local–global paradigm\"\n3) Cognitive ERP targets: \"Assessing mismatch negativity (MMN) and P3b within-individual sensitivity\"","paper_abstract_analysis":"No useful paper information.","evidence_alignment_check":"Pathology:\n- Metadata says: only \"Each participant (n=15)\"; no diagnosis/control/patient wording.\n- Few-shot pattern suggests: if no clinical recruitment is described, label as Healthy.\n- ALIGN (no conflict); inference required due to missing explicit health statement.\n\nModality:\n- Metadata says: \"auditory oddball sequences\" and names MMN/P3b oddball/local-global paradigms (auditory stimulation implied throughout).\n- Few-shot pattern suggests: oddball modality is determined by stimulus channel; auditory oddball -> Auditory.\n- ALIGN.\n\nType:\n- Metadata says: focuses on ERPs in oddball: \"mismatch negativity (MMN)\" and \"P3b\" and compares \"local–global paradigm\" vs oddball sequences.\n- Few-shot pattern suggests: oddball/novelty/deviance paradigms are treated as cognitive task datasets (commonly mapped to Attention/Perception depending on emphasis).\n- ALIGN; primary goal is sensitivity of MMN/P3b/local-global effects (attentional/regularity processing) rather than pure sensory psychophysics.","decision_summary":"Pathology (top-2):\n1) Healthy (selected): no clinical recruitment described; only \"Each participant (n=15)\" with no patient group.\n2) Unknown (runner-up): because there is no explicit \"healthy\"/\"control\" wording.\nAlignment: aligns with few-shot conventions; confidence limited by lack of explicit participant health quote.\n\nModality (top-2):\n1) Auditory (selected): explicit \"auditory oddball sequences\"; MMN/P3b oddball paradigms are auditory here.\n2) Multisensory (runner-up): local-global paradigms can exist in other modalities, but metadata here repeatedly specifies auditory.\nAlignment: strong alignment; multiple explicit auditory quotes.\n\nType (top-2):\n1) Attention (selected): oddball/MMN/P3b/local-global effects index deviance detection and attentional/context updating; metadata explicitly frames sensitivity to MMN/P3b effects.\n2) Perception (runner-up): MMN involves early auditory change detection/perceptual prediction error.\nAlignment: aligns with few-shot conventions for oddball paradigms; confidence moderate because metadata does not explicitly use the word \"attention\".","confidence_justification":"Pathology confidence is constrained because there is no explicit health/control statement (inference-only). Modality has repeated explicit references to auditory oddball sequences. Type is supported by explicit MMN/P3b/local-global oddball framing but remains somewhat ambiguous between Attention vs Perception."}},"nemar_citation_count":0,"computed_title":"Auditory oddball comparison (Optimum-1, Learning-oddball, and the local–global paradigm)","nchans_counts":[{"val":64,"count":61}],"sfreq_counts":[{"val":2500.0,"count":57},{"val":5000.0,"count":4}],"stats_computed_at":"2026-04-22T23:16:00.309606+00:00","total_duration_s":51804.4994,"author_year":"Rutiku2024","canonical_name":null}}