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Published on: March 27, 2012
Extended visual fixation and distractibility in children from six to twenty-four months of age
1Department of Psychology, University of South Carolina, Columbia 29208, USA. richards-john@sc.edu
Insights
Children
Area of Science:
- Developmental psychology
- Cognitive neuroscience
- Pediatric visual attention
Background:
- Understanding distractibility in young children is crucial for developmental research.
- Previous studies indicate attention spans increase with age.
- The relationship between sustained attention and physiological responses in infants is not fully understood.
Purpose of the Study:
- To investigate distractibility in children aged 6 months to 2 years during extended visual fixation.
- To examine the influence of fixation duration on attentional responses to distractors.
- To correlate heart rate changes with sustained attention in infants.
Main Methods:
- Forty children (6 months–2 years) watched a "Sesame Street" movie for at least 20 minutes.
- Visual fixation was recorded via videotape.
- Distractors were presented on a separate screen while heart rate was monitored.
Main Results:
- Children's latency to look at distractors increased with the duration of their prior visual fixation.
- Lowered heart rate was sustained longer during trials where children maintained fixation on the primary screen.
- A significant difference in heart rate was observed between trials with and without distraction.
Conclusions:
- Attentional engagement with visual stimuli increases over the course of a fixation in young children.
- Heart rate variability serves as a physiological indicator of increasing attention during visual tasks.
- Findings suggest developmental continuity in attentional control mechanisms from infancy to preschool age.
Abstract:
Distractibility during extended visual fixations in children 6 months to 2 years of age was examined. A children's Sesame Street movie (Follow That Bird) was presented to children (N = 40) for a minimum of 20 min while fixation was videotaped and heart rate was recorded. Distractors (computer-generated patterns or another Sesame Street movie) were presented on an adjacent television screen. Consistent with prior research with older preschool-age children, the latency to turn toward the distractor was a function of the length of the look occurring before distractor onset. For the period immediately before distractor onset, children had a greater sustained lowered heart rate for the trials on which they continued looking at the center television monitor than for the trials on which they looked toward the distractor. This pattern of distractibility suggests attention increases over the course of a look toward the television, and that heart rate changes reflect this increase in attention.
