How do complex span tasks relate to measures of intelligence?

How do complex span tasks relate to measures of intelligence?

• A. They show no relation to intelligence
• B. They show stronger correlations with fluid intelligence than simple span tasks, reflecting CE capacity's role in reasoning and problem solving
• C. They measure crystallized intelligence
• D. They only predict memory for digits

Answer: (B)

Complex span tasks combine holding information with simultaneous processing, so they tap working memory capacity that involves the central executive. This part of working memory supports attention control, updating, and managing interference—skills crucial for solving novel problems. Fluid intelligence measures rely on these same flexible reasoning and problem-solving abilities, so performance on complex span tasks tends to align more with fluid intelligence. In contrast, simple span tasks mainly reflect storage capacity with little processing demand, which is why their relationship to reasoning and problem solving is weaker. Crystallized intelligence, being about accumulated knowledge, also doesn’t track as closely with the control processes tapped by complex span. So complex span tasks show stronger correlations with fluid intelligence than with simple memory spans, illustrating the central executive’s role in reasoning and problem solving.

Complex span tasks combine holding information with simultaneous processing, so they tap working memory capacity that involves the central executive. This part of working memory supports attention control, updating, and managing interference—skills crucial for solving novel problems. Fluid intelligence measures rely on these same flexible reasoning and problem-solving abilities, so performance on complex span tasks tends to align more with fluid intelligence. In contrast, simple span tasks mainly reflect storage capacity with little processing demand, which is why their relationship to reasoning and problem solving is weaker. Crystallized intelligence, being about accumulated knowledge, also doesn’t track as closely with the control processes tapped by complex span. So complex span tasks show stronger correlations with fluid intelligence than with simple memory spans, illustrating the central executive’s role in reasoning and problem solving.