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Related Experiment Video

Updated: Jun 25, 2026

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm

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Published on: May 15, 2019

Infant sign language program effects on synchronic mother-infant interactions.

Ximena Góngora¹, Chamarrita Farkas

¹Pontificia universidad catolica de Chile, Escuela de Psicologia, Santiago, Chile. xgongora@uc.cl

Infant Behavior & Development

|February 24, 2009

Summary

An infant sign language program significantly improved mother-infant interactions, particularly visual and tactile synchrony. This early communication intervention fostered more frequent and longer shared moments between mothers and their babies.

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Area of Science:

Developmental Psychology
Child Development
Communication Studies

Background:

Mother-infant interaction is crucial for early development.
Infant sign language (ISL) is an emerging communication tool.
Limited research exists on the impact of intentional ISL programs on interaction synchrony.

Purpose of the Study:

To investigate the effects of an intentional infant sign language program on mother-infant interaction synchrony.
To compare interaction patterns between infants exposed to ISL and a control group.

Main Methods:

Quasi-experimental, longitudinal, and comparative study design.
14 mother-infant dyads participated, with infants aged 5-9 months at baseline.
Observations of free play were analyzed using a Grid to analyze early interactions, comparing synchronic interaction frequency and duration.

Main Results:

Significant differences observed in visual and tactile synchronic interactions between the experimental and control groups.
A trend towards increased vocal interactions was noted in the experimental group.
These differences were evident at 12-14 and 18-20 months of infant age.

Conclusions:

Intentional infant sign language programs can positively influence mother-infant interaction synchrony.
The program appears to enhance visual, tactile, and potentially vocal engagement.
Findings support the use of ISL as a tool to enrich early parent-child communication.