Evidence map›Paper›PMID 33602997›Full record

ArticleScientific reports2021

Melody complexity of infants' cry and non-cry vocalisations increases across the first six months.

Kathleen Wermke, Michael P Robb, Philip J Schluter

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

  1. Article
  2. Article
  3. The Sound of Emotional Prosody: Nearly 3 Decades of Research and Future Directions.Perspectives on psychological science : a journal of the Association for Psychological Science · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Fundamental Frequency Contour (Melody) of Infant Vocalizations across the First Year.Folia phoniatrica et logopaedica : official organ of the International Association of Logopedics and Phoniatrics (IALP) · 2023
    Article
  9. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Kathleen Wermke *Center for Pre-Speech Development & Developmental Disorders, University Hospital, University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany. wermke_k@klinik.uni-wuerzburg.de.
Michael P Robb *Department of Communication Sciences and Disorders, Pennsylvania State University, State College, USA.
Philip J Schluter *School of Health Sciences, University of Canterbury - Te Whare Wānanga O Waitaha, Christchurch, New Zealand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In early infancy, melody provides the most salient prosodic element for language acquisition and there is huge evidence for infants' precocious aptitudes for musical and speech melody perception. Yet, a lack of knowledge remains with respect to melody patterns of infants' vocalisations. In a search for developmental regularities of cry and non-cry vocalisations and for building blocks of prosody (intonation) over the first 6 months of life, more than 67,500 melodies (fundamental frequency contours) of 277 healthy infants from monolingual German families were quantitatively analysed. Based on objective criteria, vocalisations with well-identifiable melodies were grouped into those exhibiting a simple (single-arc) or complex (multiple-arc) melody pattern. Longitudinal analysis using fractional polynomial multi-level mixed effects logistic regression models were applied to these patterns. A significant age (but not sex) dependent developmental pattern towards more complexity was demonstrated in both vocalisation types over the observation period. The theoretical concept of melody development (MD-Model) contends that melody complexification is an important building block on the path towards language. Recognition of this developmental process will considerably improve not only our understanding of early preparatory processes for language acquisition, but most importantly also allow for the creation of clinically robust risk markers for developmental language disorders.

Indexed as

CryingEvaluation Studies as TopicFemaleHumansInfantLanguageLanguage DevelopmentLongitudinal StudiesMaleMusicSound SpectrographySpeech Perception

Identifiers

PMID33602997
PMCPMC7893022

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