Does managing complex task rules explain fluid intelligence?
An individual's ability to hold and implement a complex set of new task rules is more strongly linked to their fluid intelligence than traditional memory span tasks.
Source
Task rules, working memory, and fluid intelligence
Study at a glance
- Design
- Cross-sectional — Individual-differences battery relating Culture Fair IQ to novel task-rule implementation versus span tasks
- N
- N=88 · Age 19–65, median 48; mean Culture Fair IQ 103 (range 76–139), IQ approximately independent of age
- Population
- Paid adults selected for a broad, approximately population-representative fluid-intelligence range
- Outcome
- Accuracy implementing a complex novel task-rule set, which correlated r = 0.57 with fluid intelligence, more strongly than most span tasks
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Does managing complex task rules explain fluid intelligence?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
88
On the basis of prior testing with the Culture Fair test, Scale 2, Form A (Institute for Personality and Ability Testing, ), we selected a group of 88 participants ranging in age from 19 to 65 (median 48) years.
.57
Of the five types of working memory assessed, rule working memory showed the highest correlation (.57) with Culture Fair IQ.
What they did
Researchers tested 88 participants, aged 19 to 65 years, on several different cognitive tests. They compared performance on traditional working memory tasks, like digit and spatial spans, with performance on rule working memory tasks that required remembering and applying five rules. Fluid intelligence was measured using a standard non-verbal reasoning test.
What they found
The ability to follow task rules correlated strongly with fluid intelligence at .57, which was significantly higher than the correlations for most other working memory tasks. Even though participants neglected rules on 28% of trials, 65% of these neglect cases occurred despite the participants still being able to correctly recall the rules afterward.
The limits
What it doesn't show
Because this study is purely correlational, it cannot prove that the ability to build a mental control program causes higher fluid intelligence. The study also relied on a relatively small sample of 88 adults, which limits generalizability to broader populations. Finally, it remains unclear whether training people on complex rule-following tasks would actually improve their general fluid intelligence.
Key terms
- Fluid intelligence
- The capacity to think logically and solve novel problems independent of acquired knowledge.
- Working memory
- A cognitive system with a limited capacity that can temporarily hold and manipulate information.
- Goal neglect
- A phenomenon where a person can recall a rule but fails to apply it to direct their behavior.
- Spatial span
- A measure of short-term memory capacity for visual-spatial information, typically assessed by remembering sequences of touched blocks.
- Operation span
- A complex working memory measure requiring participants to remember words while simultaneously solving mathematical equations.
- Visual short-term memory (VSTM)
- The ability to temporarily hold a small amount of visual information, such as colors and shapes, over a short delay.
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What is goal neglect in working memory tasks?
Common questions
What is the difference between traditional working memory and rule working memory?
Traditional working memory tasks measure how many items (like digits or shapes) you can hold in mind. Rule working memory measures your ability to keep a whole system of instructions organized in your head to guide your behavior.
What is goal neglect, and how does it happen?
Goal neglect occurs when someone knows and can repeat a rule but fails to actually follow it during a task. It happens because the mental control program fails to implement the rule at the right time, often due to high task complexity.
Why does rule working memory correlate so highly with fluid intelligence?
Both rule working memory and fluid intelligence tests require people to construct a novel mental control program. This program organizes behavior into sequential steps to manage complex, multi-part situations.
Did age affect the relationship between rule working memory and fluid intelligence?
No, the researchers found that adjusting for the participants' ages had almost no effect on the strong correlation between rule working memory and fluid intelligence.
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