Related Experiment Videos
Developmental changes in the processing of hierarchical shapes continue into adolescence.
Catherine J Mondloch1, Sybil Geldart, Daphne Maurer
11280 Main St. West, McMaster University, Hamilton, Ont., Canada L8S 4K1. mondloch@psychology.mcmaster.ca
Journal of Experimental Child Psychology
|January 30, 2003
Summary
Children show a global precedence effect in visual processing, favoring overall shapes over details. This bias strengthens in younger children and matures by adolescence, indicating developing attentional control in visual form perception.
Area of Science:
- Cognitive psychology
- Developmental psychology
- Neuroscience
Background:
- Hierarchical visual forms are processed at global (overall) and local (detail) levels.
- Understanding the developmental trajectory of this dual processing is crucial for cognitive development research.
Purpose of the Study:
- To investigate the developmental changes in global and local visual processing of hierarchical shapes.
- To examine age-related differences in the global precedence effect and hemispheric specialization.
Main Methods:
- Participants (6-14 years old, adults) viewed hierarchical shapes and judged sameness at global or local levels.
- Stimuli were presented centrally (Experiments 1 & 2) and in visual fields (Experiment 3).
- Reaction times were measured to assess processing speed and biases.
Main Results:
- All age groups exhibited a global precedence effect, responding faster to global than local information.
- This global bias was more pronounced in younger children and decreased with age, reaching adult levels by 14 years.
- Hemispheric specialization for hierarchical shape processing appeared adult-like by age 10, but attentional control was less flexible in children.
Conclusions:
- Children's visual processing of hierarchical forms shows developmental changes in global precedence and attentional modulation.
- While hemispheric specialization for visual form processing emerges early, the ability to flexibly shift attention between global and local levels matures later.
- Findings suggest that 10-year-olds' greater bias stems from challenges in attentional control and parallel processing compared to adults.