Developmental Change

Stabel, Aaron; Kroeger-Geoppinger, Kimberly; Weiss, Deborah; Schneider, Naomi; Schultz-Krohn, Winifred; Glennon, Tara J.; Winterling, Vince; Spencer, Elizabeth; Hansen, Robin; Shtayermman, Oren; Benson, Betsey A.; Brooks, Whitney T.; Roesser, Jessica L.; Danial, John T.; Lin, C. Enjey; Wood, Jeffrey J.; Wimpory, Dawn; Karmiloff‐Smith, Annette; Lum, Joyce; Hodgson, Kristin; Lestrud, Michelle; Rapin, Isabelle; Gulsrud, Amanda C.; Kasari, Connie; Beighley, Jennifer S.; Wieder, Serena; Schwartz, Ilene Sharon; McBride, Bonnie; Gerber, Sima; Anagnostou, Evdokia; Mankad, Deepali; Corsello, Christina; Leekam, Susan; LeCouteur, Ann S.; Berney, Thomas P.; Kanne, Steve; Matson, Johnny L.; Worley, Julie; Shattuck, Paul; Parvez, Rizwan; McCullagh, Jennifer; Saulnier, Celine A.; Zane, Thomas; Davis, Cheryl; Jou, Roger J.; Staib, Lawrence H.; Pickles, Andrew; LaRue, Robert; Woodbury‐Smith, Marc; Azad, Alvi; DeAquair, Rebecca; Holmes, Anne; Newman, Tina; Miklos, Michael; Austin, Sarita; Gilbert, Tobi; Sliva, Jonathan; Munday, Rebecca; El-Fishawy, Paul; Pelphrey, Kevin A.; Doyle, Carolyn A.; McDougle, Christopher J.; Scahill, Lawrence David; Delmolino, Lara; Harris, Sandra; Volkmar, Fred R.; Ruedel, Kristin; Donaldson, Amy; Bean, Allison; Newman, Diana B.; Lewis, Moira; Violette, Micaela; Latham, Susan; Califano, Claudia

doi:10.1007/978-1-4419-1698-3_1426

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two pathways may explain the shift towards egressive laughter over ontogeny and the enhanced interpersonal effects of egressive laughter. First, developmental changes in the acoustic features of laughter are likely to relate to human anatomical development: the vocal tract of human infants initially resembles that of non-human primates [10], but undergoes major developmental changes during the first years [28]. Functionally, infants greatly improve in terms of vocal control [29] as they start to produce proto-speech vocalizations like babbling around seven to eight months [30,31].…”

Section: Discussionmentioning

confidence: 99%

“…However, laughter emerges in human infants as young as three-months old [8,9]. It may be that the production of laughter vocalizations changes over the course of development, since the vocal tract of a newborn infant is similar to that of a great ape [10], and vocal production undergoes dramatic changes within the first 2 years of life [11,12]. Compared to human adults, infant vocalizations are generally more likely to include ingressive sound production [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The ontogeny of human laughter

et al. 2021

View full text Add to dashboard Cite

Human adult laughter is characterized by vocal bursts produced predominantly during exhalation, yet apes laugh while exhaling and inhaling. The current study investigated our hypothesis that laughter of human infants changes from laughter similar to that of apes to increasingly resemble that of human adults over early development. We further hypothesized that the more laughter is produced on the exhale, the more positively it is perceived. To test these predictions, novice ( n = 102) and expert (phonetician, n = 15) listeners judged the extent to which human infant laughter ( n = 44) was produced during inhalation or exhalation, and the extent to which they found the laughs pleasant and contagious. Support was found for both hypotheses, which were further confirmed in two pre-registered replication studies. Likely through social learning and the anatomical development of the vocal production system, infants' initial ape-like laughter transforms into laughter similar to that of adult humans over the course of ontogeny.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The ontogeny of human laughter

et al. 2021

View full text Add to dashboard Cite

show abstract

It’s Mine, . . . It’s Mine: Unsolicited Repetitions Are Reduced in Toddlers

et al. 2022

View full text Add to dashboard Cite

A phenomenon called “repetition reduction” can increase articulation rate in adults by facilitating phonetic and motor processes, which indicates flexibility in the control of articulation rate. Young children, who speak much slower, may not have the same speech motor flexibility resulting in the absence of the repetition reduction effect. In this study, we tested whether spontaneous repetitions of young children are produced with a faster articulation rate than their original utterances. Twelve monolingual English-speaking children were observed at four time points between 2;0 and 3;0 years of age. A significant increase in articulation rate and syllable count was found using multilevel models for all utterances over the 1-year period. At each time point, however, the repeated utterances were produced significantly faster than the original utterances even though the content and syllable count differed minimally. Our findings conform to the pattern of adult studies suggesting that a “naturistic” form of repetition reduction is already present in the speech of children at 2;0 years. Although certain aspects of speech motor control are undergoing rapid development, existing motor capability at 2;0 already supports flexible changes in articulation rate including repetition reduction.

show abstract

Developmental Change

Cited by 2 publications

References 0 publications

The ontogeny of human laughter

The ontogeny of human laughter

It’s Mine, . . . It’s Mine: Unsolicited Repetitions Are Reduced in Toddlers

Contact Info

Product

Resources

About