The effects of verbal and spatial memory load on children's processing speed.

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Neuroscience

Background:

• Working memory is crucial for cognitive tasks, involving both storage and processing.
• Understanding resource allocation in working memory is key to explaining cognitive development.
• Previous research suggests age-related differences in cognitive control and memory.

Purpose of the Study:

• To investigate the relationship between memory maintenance and processing speed in children.
• To determine if working memory resources are shared between storage and processing.
• To examine developmental changes in proactive remembering and cognitive resource use.

Main Methods:

• Adaptive complex span tasks were administered to 185 children aged 4-10 years.
• Tasks interleaved simple judgments with to-be-remembered items to assess processing speed and memory load.
• Performance was analyzed based on age groups (4-6 and 8-10 years) and serial position of processing judgments.

Main Results:

• Older children (8-10 years) exhibited slower processing speeds with increased memory load, particularly beyond two items.
• Younger children (4-6 years) did not show significant slowing of processing with increasing memory load.
• Processing judgment times varied differently within lists across age groups, indicating distinct developmental patterns.

Conclusions:

• Findings support models of working memory with shared resources for verbal and spatial storage and processing.
• Results suggest that remembering becomes a more proactive process with increasing age during childhood.
• Developmental differences in working memory resource allocation and strategy use are evident between 4-6 and 8-10 years.