{"doi":"10.31234/osf.io/rmghn","title":"Associations between EEG trajectories, family income, and cognitive abilities over the first two years of life.","abstract":"We sought to characterize developmental trajectories of EEG spectral power over the first 2 years after birth and examine whether family income or maternal education alter those trajectories. We analyzed EEGs (n=161 infants, 534 EEGs) collected longitudinally between 2 and 24 months of age, and calculated frontal absolute power across 7 canonical frequency bands. For each frequency band, a piecewise growth curve model was fit, resulting in an estimated intercept and two slope parameters from 2–9 months and 9–24 months of age. Across 6/7 frequency bands, absolute power significantly increased over age, with steeper slopes in the 2–¬9 month period compared to 9–24 months. Increased family income, but not maternal education, was associated with higher intercept (2–3 month power) across delta–gamma bands (p range = 0.002 to 0.04), and reduced change in power between 2–9 months of age in lower frequency bands (delta-alpha, p range = 0.01-0.02). There was no significant effect of income on slope between 9–24 months. EEG intercept and slope measures did not mediate relationships between income and 24-month verbal and nonverbal development. These results add to growing literature concerning the role of socioeconomic factors in shaping brain trajectories.","journal":"PsyArXiv (OSF Preprints)","year":2023,"id":394011,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.7383,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2023-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":389918,"name":"Lara J. Pierce","orcid":"0000-0002-2561-5058","position":1,"is_corresponding":false},{"id":1168804,"name":"George Sideridis","orcid":null,"position":2,"is_corresponding":false},{"id":495746,"name":"Mark Wade","orcid":"0000-0003-4643-8465","position":3,"is_corresponding":false},{"id":227642,"name":"Charles A. Nelson","orcid":"0000-0002-4723-247X","position":4,"is_corresponding":false},{"id":569021,"name":"Carol L. Wilkinson","orcid":"0000-0002-4694-8564","position":0,"is_corresponding":true}],"reference_count":57,"raw_metadata":null,"created_at":"2026-07-19T01:19:10.334330Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}