Infant Sitting Status, Sitting Age, and Everyday Positioning Experience Across the Transition to Independent Sitting

Kari S. Kretch; Aylin Luna; Caitlin M. Fausey; John M. Franchak

doi:10.1111/infa.70059

journal article Nov 01, 2025

Infant Sitting Status, Sitting Age, and Everyday Positioning Experience Across the Transition to Independent Sitting

Kari S. Kretch

Aylin Luna Caitlin M. Fausey

John M. Franchak

Infancy Vol. 30 No. 6 · Wiley

View at Publisher Save 10.1111/infa.70059

Abstract

ABSTRACT
Positioning—the body's physical configuration and relations to supports and restraints—is a fundamental aspect of infants' everyday experiences. How do everyday positioning experiences (the amount of time spent in different positions during daily life) change with the acquisition of postural skills like sitting? This study investigated relations between sitting status (whether infants have achieved a sitting milestone), sitting age (amount of time before or after that milestone), and everyday positioning experience. Forty‐three infants participated at 4, 5, 6, and/or 7 months of chronological age. Everyday experience was measured using Ecological Momentary Assessment: Caregivers reported infants' current position repeatedly throughout their daily activities. The best predictors of everyday sitting experience (proportion of responses in which the infant was in an unrestrained sitting position) were chronological age and overall sitting age, calculated from the first day infants sat using hands for support; hands‐free sitting age, calculated from the first day infants sat without hands, did not uniquely contribute. Sitting experience supplanted supine experience, which decreased with overall sitting age; the effect of overall sitting age on prone experience varied with chronological age. Time restrained by an adult decreased only with chronological age, and time restrained by a device was not related to chronological or sitting age. Results suggest that the continuous development of sitting skill changes the positioning composition of infants' everyday unrestrained floor time.

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References

60

[1]

10.1046/j.1365‐2214.2001.00186.x

[2]

How Do You Learn to Walk? Thousands of Steps and Dozens of Falls per Day

Karen E. Adolph, Whitney G. Cole, Meghana Komati et al.

Psychological Science 10.1177/0956797612446346

[3]

10.1016/j.tics.2018.05.010

[4]

10.1038/s41598‐019‐56862‐5

[5]

10.1016/s0167‐9457(01)00063‐x

[6]

Avruskin A.2018. “Physical Therapy Guide to Container Baby Syndrome.” Retrieved June 30 2021 from American Physical Therapy Association Choose PT website.https://www.choosept.com/symptomsconditionsdetail/physical‐therapy‐guide‐to‐container‐baby‐syndrome.

[7]

Fitting Linear Mixed-Effects Models Using lme4

Douglas Bates, Martin Mächler, Ben Bolker et al.

Journal of Statistical Software 10.18637/jss.v067.i01

[8]

10.1002/(sici)1098‐2302(199712)31:4<287::aid‐dev6>3.0.co;2‐n

[9]

Bolker B. andD.Robinson.2025.broom.mixed: Tidying Methods for Mixed Models.https://github.com/bbolker/broom.mixed.

[10]

10.1097/pep.0b013e3181e69490

[11]

Use of Seating Devices in Infants Too Young to Sit

Charles W. Callahan

Archives of Pediatrics & Adolescent Medicine 10.1001/archpedi.1997.02170400019004

[12]

10.1207/s15327078in0102_1

[13]

10.1111/j.1467‐9280.1992.tb00259.x

[14]

10.1111/cdev.12024

[15]

10.1007/s00221‐017‐5156‐4

[16]

Changing Opportunities for Learning in Everyday Life: Infant Body Position Over the First Year

John M. Franchak

Infancy 10.1111/infa.12272

[17]

10.1016/j.copsyc.2019.06.035

[18]

Longitudinal relations between independent walking, body position, and object experiences in home life.

John M. Franchak, Kellan Kadooka, Caitlin M. Fausey

Developmental Psychology 10.1037/dev0001678

[19]

See and be seen: Infant–caregiver social looking during locomotor free play

John M. Franchak, Kari S. Kretch, Karen E. Adolph

Developmental Science 10.1111/desc.12626

[20]

10.3758/s13428‐023‐02236‐9

[21]

10.1016/j.infbeh.2013.03.011

[22]

10.3109/01942638.2013.820252

[23]

10.1002/dev.10110

[24]

10.1159/000048154

[25]

10.1016/j.infbeh.2017.10.001

[26]

Tummy Time Tracking: Examining Agreement Between Parent Recall and Direct Observation in Infants

Ketaki Inamdar, Stacey C. Dusing, Leroy Thacker et al.

The American Journal of Occupational Therapy 10.5014/ajot.2024.050521

[27]

10.1002/dev.22527

[28]

10.1097/pep.0000000000000622

[29]

10.1002/2327‐6924.12215

[30]

Comparison of U.S. and Tajik infants' time in containment devices

Lana B. Karasik, Yana A. Kuchirko, Rano M. Dodojonova et al.

Infant and Child Development 10.1002/icd.2340

[31]

10.1111/j.1467‐8624.1988.tb03244.x

[32]

Crawling and Walking Infants See the World Differently

Kari S Kretch, John M Franchak, Karen E Adolph

Child Development 10.1111/cdev.12206

[33]

Infant posture and caregiver‐provided cognitive opportunities in typically developing infants and infants with motor delay

Kari S. Kretch, Natalie A. Koziol, Emily C. Marcinowski et al.

Developmental Psychobiology 10.1002/dev.22233

[34]

Sitting and caregiver speech input in typically developing infants and infants with cerebral palsy

Kari S. Kretch, Emily C. Marcinowski, Natalie A. Koziol et al.

PLoS ONE 10.1371/journal.pone.0324106

[35]

Labotz M.2020. “Out of the Container and Onto the Floor.” Retrieved June 30 2021 From American Academy of Pediatrics website.https://www.aappublications.org/news/2020/05/22/container‐floor‐pediatrics‐5‐22‐20.

[36]

10.1111/desc.12615

[37]

10.3389/fpsyg.2016.00475

[38]

Head and body structure infants’ visual experiences during mobile, naturalistic play

Chuan Luo, John M. Franchak

PLoS ONE 10.1371/journal.pone.0242009

[39]

Infant placement and language exposure in daily life

Lauren G. Malachowski, Virginia C. Salo, Amy Work Needham et al.

Infant and Child Development 10.1002/icd.2405

[40]

Sitting skill and the emergence of arms‐free sitting affects the frequency of object looking and exploration

Emily C. Marcinowski, Tanya Tripathi, Lin‐Ya Hsu et al.

Developmental Psychobiology 10.1002/dev.21854

[41]

10.1080/01942638.2022.2027845

[42]

10.1542/peds.2022‐057990

[43]

10.1037/a0039572

[44]

10.1016/j.infbeh.2012.07.010

[45]

10.1111/j.1469‐8749.2007.00858.x

[46]

Piper M. C. (2022)

[47]

Piper M. C. "Construction and Validation of the Alberta Infant Motor Scale (AIMS)" Canadian Journal of Public Health. Revue Canadienne de Sante Publique (1992)

[48]

10.1080/00222895.2023.2262428

[49]

10.3389/fpsyg.2016.00759

[50]

Russell D. J. (2002)

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Details

Published: Nov 01, 2025
Vol/Issue: 30(6)
License: View

Authors

K

Kari S. Kretch

University of Southern California Los Angeles California USA

A

Aylin Luna

University of California Riverside California USA

C

Caitlin M. Fausey

University of Oregon Eugene Oregon USA

J

John M. Franchak

University of California Riverside California USA

Funding

National Science Foundation Award: BCS 1941449

Cite This Article

Kari S. Kretch, Aylin Luna, Caitlin M. Fausey, et al. (2025). Infant Sitting Status, Sitting Age, and Everyday Positioning Experience Across the Transition to Independent Sitting. Infancy, 30(6). https://doi.org/10.1111/infa.70059

Infant Sitting Status, Sitting Age, and Everyday Positioning Experience Across the Transition to Independent Sitting

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