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Published on: October 5, 2018
The development of visual expectations in the first year
J S Reznick1, K Chawarska, S Betts
1Department of Psychology, University of North Carolina, Chapel Hill 27599-3270, USA. reznick@unc.edu
Insights
Infant expectations develop between 4-9 months, showing procedural knowledge rather than specific event predictions. This study used the Visual Expectations Procedure to track infant anticipatory behaviors.
Area of Science:
- Developmental Psychology
- Cognitive Science
- Infant Perception
Background:
- Understanding how infants form expectations is crucial for cognitive development research.
- Previous studies suggest infants can anticipate simple events, but the nature of these expectations is debated.
Purpose of the Study:
- To investigate the developmental trajectory of expectation formation in infants.
- To differentiate between general procedural knowledge and specific event-based expectations in early development.
Main Methods:
- The Visual Expectations Procedure was employed with 128 infants (6-12 months) in Experiment 1 and 76 infants (4-12 months) in Experiment 2.
- Participants viewed videotaped sequences with alternating or complex pivot patterns of a toy's appearance.
- Measures included reaction time and the percentage of anticipatory gaze shifts.
Main Results:
- Infant reaction times improved and anticipatory gaze shifts increased significantly between 6-9 months (Experiment 1) and 4-8 months (Experiment 2).
- Performance did not improve further in older infants.
- Anticipations were often inaccurate, especially for complex patterns and younger infants, indicating gaze shifts before stimulus onset but not toward the correct location.
Conclusions:
- Young infants demonstrate expectations reflecting general or procedural knowledge.
- The findings suggest that early expectations may not involve specific, articulated predictions of upcoming events.
- Developmental changes in expectation formation are evident within the first year of life.
Abstract:
The development of expectations was investigated by using the Visual Expectations Procedure. In Experiment 1, 128 infants aged 6-, 9-, and 12-months-old saw two 40-trial sequences of a videotaped mechanical toy appearing in various locations. The sequences represented an alternation pattern (i.e., ABAB) or a complex pivot pattern (i.e., ABCBABCB). In Experiment 2, 76 infants aged 4-, 8-, and 12-months-old saw either a left-right alternation or a top-bottom alternation. Reaction time improved and the percentage of anticipations increased between 6 and 9 months in Experiment 1 and between 4 and 8 months in Experiment 2 but not thereafter. Anticipations for the pivot sequence and for younger infants on both sequences were often incorrect (i.e., gaze shifts occurred before stimulus onset but were not directed toward the upcoming stimulus). We conclude that young infants have expectations that reflect some degree of general or procedural knowledge, but it is not clear that this behavior implies specific, articulated expectations about upcoming events.
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