{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/132705"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/132705","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The role of siblings on infant language exposure in daylong audio recordings","abstract":"This study investigates how family characteristics contribute to language produced in homes. Specifically exploring the effects of older siblings on the amounts and types of child- directed and overheard speech that infants hear. To address this, this study analyzed 76 daylong audio home recordings from 26 American families with infants between the ages of 6-12 months. To annotate the recordings, each audio was randomly sampled for a total of 2 hours that was comprised of 30 second intervals. Each interval was coded for all spoken utterances for all speakers and to whom the speech was addressed to. Findings revealed that infants with older siblings had about half as much speech directed to them as did infants without older siblings. This effect was entirely driven by contexts in which the older sibling was physically present; no differences in amounts of directed speech when older siblings were not present were observed. However, when combining all child-directed input (to either the infant or the siblings) there were no differences between families with and without siblings. Further, the nature of overheard speech changed when a sibling was present, not simply because the sibling added another speaker to the environment, but because other speakers’ distribution of speech differed when the sibling was physically present during daily activities. The set of individuals in a home have substantial consequences for the speech that is produced and amounts of overheard- and child- directed speech may vary more widely in American homes than previously assumed.","abstract_html":"This study investigates how family characteristics contribute to language produced in homes. Specifically exploring the effects of older siblings on the amounts and types of child- directed and overheard speech that infants hear. To address this, this study analyzed 76 daylong audio home recordings from 26 American families with infants between the ages of 6-12 months. To annotate the recordings, each audio was randomly sampled for a total of 2 hours that was comprised of 30 second intervals. Each interval was coded for all spoken utterances for all speakers and to whom the speech was addressed to. Findings revealed that infants with older siblings had about half as much speech directed to them as did infants without older siblings. This effect was entirely driven by contexts in which the older sibling was physically present; no differences in amounts of directed speech when older siblings were not present were observed. However, when combining all child-directed input (to either the infant or the siblings) there were no differences between families with and without siblings. Further, the nature of overheard speech changed when a sibling was present, not simply because the sibling added another speaker to the environment, but because other speakers’ distribution of speech differed when the sibling was physically present during daily activities. The set of individuals in a home have substantial consequences for the speech that is produced and amounts of overheard- and child- directed speech may vary more widely in American homes than previously assumed.","abstract_has_math":false,"creators":["Galindo, Maily"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":["Montag, Jessica L"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-12","date_published":"2025-12","updated_at":"2026-07-22T22:25:07Z","subjects":["child-directed speech","overheard speech","siblings","daylong audio recordings"],"languages":["en"],"rights":["Copyright 2025 Maily Galindo"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/132705","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Montag, Jessica L"]},{"key":"dc:creator","label":"Author","values":["Galindo, Maily"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-12","2025-12-11"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Psychology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["child-directed speech","overheard speech","siblings","daylong audio recordings"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Maily Galindo"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/132705"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This study investigates how family characteristics contribute to language produced in homes. Specifically exploring the effects of older siblings on the amounts and types of child- directed and overheard speech that infants hear. To address this, this study analyzed 76 daylong audio home recordings from 26 American families with infants between the ages of 6-12 months. To annotate the recordings, each audio was randomly sampled for a total of 2 hours that was comprised of 30 second intervals. Each interval was coded for all spoken utterances for all speakers and to whom the speech was addressed to. Findings revealed that infants with older siblings had about half as much speech directed to them as did infants without older siblings. This effect was entirely driven by contexts in which the older sibling was physically present; no differences in amounts of directed speech when older siblings were not present were observed. However, when combining all child-directed input (to either the infant or the siblings) there were no differences between families with and without siblings. Further, the nature of overheard speech changed when a sibling was present, not simply because the sibling added another speaker to the environment, but because other speakers’ distribution of speech differed when the sibling was physically present during daily activities. The set of individuals in a home have substantial consequences for the speech that is produced and amounts of overheard- and child- directed speech may vary more widely in American homes than previously assumed.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-12-01","The student, Maily Galindo, accepted the attached license on 2025-12-10 at 11:08.","The student, Maily Galindo, submitted this Thesis for approval on 2025-12-10 at 11:42.","This Thesis was approved for publication on 2025-12-11 at 07:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23120 on 2026-02-19 at 18:46:54"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The role of siblings on infant language exposure in daylong audio recordings"]}]}],"canonical_facts":{"dc:contributor":["Montag, Jessica L"],"dc:creator":["Galindo, Maily"],"dc:date":["2025-12","2025-12-11"],"dc:description":["This study investigates how family characteristics contribute to language produced in homes. Specifically exploring the effects of older siblings on the amounts and types of child- directed and overheard speech that infants hear. To address this, this study analyzed 76 daylong audio home recordings from 26 American families with infants between the ages of 6-12 months. To annotate the recordings, each audio was randomly sampled for a total of 2 hours that was comprised of 30 second intervals. Each interval was coded for all spoken utterances for all speakers and to whom the speech was addressed to. Findings revealed that infants with older siblings had about half as much speech directed to them as did infants without older siblings. This effect was entirely driven by contexts in which the older sibling was physically present; no differences in amounts of directed speech when older siblings were not present were observed. However, when combining all child-directed input (to either the infant or the siblings) there were no differences between families with and without siblings. Further, the nature of overheard speech changed when a sibling was present, not simply because the sibling added another speaker to the environment, but because other speakers’ distribution of speech differed when the sibling was physically present during daily activities. The set of individuals in a home have substantial consequences for the speech that is produced and amounts of overheard- and child- directed speech may vary more widely in American homes than previously assumed.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-12-01","The student, Maily Galindo, accepted the attached license on 2025-12-10 at 11:08.","The student, Maily Galindo, submitted this Thesis for approval on 2025-12-10 at 11:42.","This Thesis was approved for publication on 2025-12-11 at 07:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23120 on 2026-02-19 at 18:46:54"],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/132705"],"dc:language":["en"],"dc:rights":["Copyright 2025 Maily Galindo"],"dc:subject":["child-directed speech","overheard speech","siblings","daylong audio recordings"],"dc:title":["The role of siblings on infant language exposure in daylong audio recordings"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Psychology"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:07Z"}