Dataset Information

What Do North American Babies Hear? A large-scale cross-corpus analysis.

ABSTRACT: A range of demographic variables influences how much speech young children hear. However, because studies have used vastly different sampling methods, quantitative comparison of interlocking demographic effects has been nearly impossible, across or within studies. We harnessed a unique collection of existing naturalistic, day-long recordings from 61 homes across four North American cities to examine language input as a function of age, gender, and maternal education. We analyzed adult speech heard by 3- to 20-month-olds who wore audio recorders for an entire day. We annotated speaker gender and speech register (child-directed or adult-directed) for 10,861 utterances from female and male adults in these recordings. Examining age, gender, and maternal education collectively in this ecologically valid dataset, we find several key results. First, the speaker gender imbalance in the input is striking: children heard 2-3× more speech from females than males. Second, children in higher-maternal education homes heard more child-directed speech than those in lower-maternal education homes. Finally, our analyses revealed a previously unreported effect: the proportion of child-directed speech in the input increases with age, due to a decrease in adult-directed speech with age. This large-scale analysis is an important step forward in collectively examining demographic variables that influence early development, made possible by pooled, comparable, day-long recordings of children's language environments. The audio recordings, annotations, and annotation software are readily available for reuse and reanalysis by other researchers.

SUBMITTER: Bergelson E

PROVIDER: S-EPMC6294666 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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What Do North American Babies Hear? A large-scale cross-corpus analysis.

Bergelson Elika E Casillas Marisa M Soderstrom Melanie M Seidl Amanda A Warlaumont Anne S AS Amatuni Andrei A

Developmental science 20181012 1

A range of demographic variables influences how much speech young children hear. However, because studies have used vastly different sampling methods, quantitative comparison of interlocking demographic effects has been nearly impossible, across or within studies. We harnessed a unique collection of existing naturalistic, day-long recordings from 61 homes across four North American cities to examine language input as a function of age, gender, and maternal education. We analyzed adult speech hea ...[more]

PMID: 30369005

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Project description:BackgroundPatient-reported outcomes (PROs) such as health-related quality of life (HRQoL) and symptoms associated with chronic hepatitis B viral (HBV) infection have not been well-described in North American cohorts.AimsTo evaluate several PROs and associations with HBV disease activity markers.MethodsCross-sectional analysis including 876 adults who completed PRO measures during the Hepatitis B Research Network Adult Cohort Study. Participants on HBV treatment were excluded. Outcomes included: HRQoL using the SF-36 mental component summary and physical component summary scores; symptom burden using a 10-item Total Symptom Checklist and fatigue using an instrument from the Patient-Reported Outcomes Measurement Information System®. Covariates included laboratory markers of disease severity, virological status, comorbidities and medications.ResultsMedian age was 42 (range: 19-79), 51% were female, 73% Asian, 19% HBeAg (+), 2% had AST-platelet ratio index (APRI) ?1.5 and 74% without comorbidities. Mean mental component summary T-score = 52, physical component summary T-score = 54 and PROMIS Fatigue T-score = 47. On a scale from 0 (none) to 40 (extreme), the mean Symptom Checklist score = 3 and 25% reported no symptoms. The most frequent symptoms were fatigue (60%), irritability (32%) and itching (32%). Most symptoms were 'a little bit' bothersome. In multivariable regressions, APRI ?1.50 and more comorbidities were associated with worse patient-reported outcomes; virological markers were not. Adding the Total Symptom Checklist score to original regression models increased explanation of variation in the mental component summary score from 4% to 44% and the Physical Component Summary Score from 17% to 34%.ConclusionsUntreated North American HBV patients with mild liver disease report favourable health-related quality of life and minimal symptoms. HBV does not impact health-related quality of life unless advanced liver disease or comorbidities are present. High symptom burden explains substantial variation in health-related quality of life. (CT.gov identifier: NCT01263587).

Dataset Information

What Do North American Babies Hear? A large-scale cross-corpus analysis.

Publications

What Do North American Babies Hear? A large-scale cross-corpus analysis.

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