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Conditions under which young children can hold two rules in mind and inhibit a prepotent response
Adele Diamond1, Natasha Kirkham, Dima Amso
1Center for Developmental Cognitive Neuroscience, Eunice Kennedy Shriver Center, University of Massachusetts Medical School, Waltham 02452, USA. adele.diamond@umassmed.edu
Insights
Young children struggle with the day-night task due to high inhibitory demands. Reducing this demand, rather than simplifying rules, significantly improves their performance by allowing more computation time.
Area of Science:
- Cognitive Development
- Child Psychology
- Executive Functions
Background:
- The day-night task assesses children's ability to inhibit prepotent responses and follow complex rules.
- Young children frequently fail this task, indicating challenges with cognitive control and rule learning.
Purpose of the Study:
- To investigate the specific cognitive mechanisms underlying young children's difficulties with the day-night task.
- To identify task modifications that improve performance in 4- and 4.5-year-old children.
Main Methods:
- Systematic variations of the day-night task were administered to 96 children aged 4 and 4.5 years.
- Interventions included rule chunking, reducing inhibitory demands with unrelated responses, and introducing stimulus-response delays.
- Performance was compared across different task conditions to isolate factors affecting success.
Main Results:
- Training on rule chunking did not improve performance.
- Reducing inhibitory demand by using unrelated responses (e.g., "dog," "pig") significantly enhanced performance.
- Performance worsened when the correct response was semantically related to the inhibited response (opposites).
- Inserting a delay between stimulus and response, even with distraction, improved accuracy, suggesting a need for computation time.
Conclusions:
- Young children's failure on the day-night task is primarily linked to high inhibitory demands, not just memory load.
- Semantic relatedness between correct and incorrect responses exacerbates inhibitory difficulties.
- Children require sufficient time to process and compute the correct response, and are more successful when this time is enforced.
Abstract:
The day-night task requires saying "night" to a picture of the sun and "day" to a picture of the moon. In this investigation of why young children fail at this task, systematic variations of the task were administered to 96 children, half 4 years old and half 4 1/2 years old. Training children on the strategy of chunking the 2 rules into I ("say the opposite"), thus reducing memory load, did not help their performance. What helped was reducing the inhibitory demand by instructing them to say "dog" and "pig" (not "night" and "day") even though memory of 2 rules and inhibiting saying what the pictures represented were still required. Here the response to be activated and the response to be inhibited were unrelated. When the correct response was semantically related to, and the direct opposite of, the to-be-inhibited response, children performed poorly. Inserting a delay between stimulus and response helped even though that delay was filled with distraction. Young children apparently need several seconds to compute the answer on this task. Often they do not take the needed time; when forced to do so, they do well.