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Teleological reasoning in 4-month-old infants: pupil dilations and contextual constraints.

Gredebäck G, Melinder A - PLoS ONE (2011)

Bottom Line: Four-month-old infants were presented with feeding actions performed in a rational or irrational manner.Infants reacted to the irrational feeding actions by dilating their pupils, but only in the presence of rich contextual constraints.The study demonstrates that teleological processes are online at 4 months of age and illustrates the usefulness of pupil dilations as a measure of social cognitive processes early in infancy.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Uppsala University, Uppsala, Sweden. gustaf.gredeback@psyk.uu.se

ABSTRACT
Four-month-old infants were presented with feeding actions performed in a rational or irrational manner. Infants reacted to the irrational feeding actions by dilating their pupils, but only in the presence of rich contextual constraints. The study demonstrates that teleological processes are online at 4 months of age and illustrates the usefulness of pupil dilations as a measure of social cognitive processes early in infancy.

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Average change in pupil size.Measured from baseline to test block, separate for the rational and irrational conditions of the unconstrained and constrained contexts. Error bars represent SE and the horizontal line represent conditions that significantly differ from each other.
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pone-0026487-g002: Average change in pupil size.Measured from baseline to test block, separate for the rational and irrational conditions of the unconstrained and constrained contexts. Error bars represent SE and the horizontal line represent conditions that significantly differ from each other.

Mentions: Ten out of 12 infants dilated their pupil from baseline to test block during observation of the irrational and constrained condition (sign-test p<.05). Only half of the infants dilated their pupil during observation of the rational and constrained condition (pupil dilation in 6/12 participants, n.s.). Comparing the rational and irrational conditions of the constrained condition demonstrated more pupil dilation during observation of the irrational and constrained than the rational and constrained condition, t(11) = 2.48, p = .03, d = .89, see Figure 2. Pupil dilations differed from zero in the irrational and constrained condition, t(11) = 3.35, p<.01, but not during the rational and constrained condition.


Teleological reasoning in 4-month-old infants: pupil dilations and contextual constraints.

Gredebäck G, Melinder A - PLoS ONE (2011)

Average change in pupil size.Measured from baseline to test block, separate for the rational and irrational conditions of the unconstrained and constrained contexts. Error bars represent SE and the horizontal line represent conditions that significantly differ from each other.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3198477&req=5

pone-0026487-g002: Average change in pupil size.Measured from baseline to test block, separate for the rational and irrational conditions of the unconstrained and constrained contexts. Error bars represent SE and the horizontal line represent conditions that significantly differ from each other.
Mentions: Ten out of 12 infants dilated their pupil from baseline to test block during observation of the irrational and constrained condition (sign-test p<.05). Only half of the infants dilated their pupil during observation of the rational and constrained condition (pupil dilation in 6/12 participants, n.s.). Comparing the rational and irrational conditions of the constrained condition demonstrated more pupil dilation during observation of the irrational and constrained than the rational and constrained condition, t(11) = 2.48, p = .03, d = .89, see Figure 2. Pupil dilations differed from zero in the irrational and constrained condition, t(11) = 3.35, p<.01, but not during the rational and constrained condition.

Bottom Line: Four-month-old infants were presented with feeding actions performed in a rational or irrational manner.Infants reacted to the irrational feeding actions by dilating their pupils, but only in the presence of rich contextual constraints.The study demonstrates that teleological processes are online at 4 months of age and illustrates the usefulness of pupil dilations as a measure of social cognitive processes early in infancy.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Uppsala University, Uppsala, Sweden. gustaf.gredeback@psyk.uu.se

ABSTRACT
Four-month-old infants were presented with feeding actions performed in a rational or irrational manner. Infants reacted to the irrational feeding actions by dilating their pupils, but only in the presence of rich contextual constraints. The study demonstrates that teleological processes are online at 4 months of age and illustrates the usefulness of pupil dilations as a measure of social cognitive processes early in infancy.

Show MeSH
Related in: MedlinePlus