Does our self-awareness change as we grow older?
As people age, their overall confidence in their performance decreases, but their actual ability to evaluate individual decisions remains just as accurate.
Source
Age-related decreases in global metacognition are independent of local metacognition and task performance
What they did
Researchers evaluated 304 participants grouped into 6 age brackets spanning from young adults to older adults. To test self-awareness, participants completed short-term memory and visual discrimination tasks on a computer, indicating their confidence after each trial on a 201-point scale. The task difficulty was dynamically updated using an adaptive staircase to keep overall performance accuracy stable across age groups.
What they found
The study showed that local metacognitive efficiency—how accurately confidence ratings tracked correct and incorrect answers on a trial-by-trial basis—did not decrease with age. However, overall metacognitive bias decreased, meaning that older adults reported lower average confidence during the tasks and gave lower global self-estimates of their performance both before and after the tasks. Additionally, individual metacognitive efficiency scores were positively correlated across the memory and perceptual tasks, with an overall cross-task correlation of 0.60.
The limits
What it doesn't show
The cross-sectional design cannot track how individual self-awareness changes over time, meaning differences between age groups might stem from generational or cultural factors rather than aging itself. Additionally, the online platform used to recruit participants may have biased the sample toward technology-literate, high-functioning older adults, potentially obscuring a real-world decline in cognitive self-evaluation. Finally, the study used simplified laboratory tasks with performance-matching, which might not reflect how older adults evaluate their cognitive abilities in complex daily-life scenarios.
Key terms
- Metacognition
- The ability to monitor and evaluate one's own cognitive processes, often described as 'thinking about thinking'.
- Metacognitive efficiency
- A measure of how well a person's confidence ratings track their actual task accuracy, adjusted to control for differences in basic task performance.
- Metacognitive bias
- An individual's general tendency to report high or low confidence on average, regardless of their actual accuracy.
- Signal detection theory
- A mathematical framework used to measure a person's ability to distinguish between signal and noise, separating actual sensitivity from decision biases.
- Domain-generality
- The extent to which a cognitive ability, such as metacognitive monitoring, remains consistent and correlates across different types of tasks.
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Quiz yourself
How is local metacognition distinguished from global metacognition in psychological research?
Common questions
Why did the researchers use an adaptive staircase to control task difficulty?
Controlling task difficulty ensures that all participants achieve similar accuracy levels. This isolates metacognitive ability, preventing differences in basic memory or perceptual skills from confusing the measurement of self-awareness.
Does this mean older adults are actually worse at memory and visual tasks?
No, the older adults in this study performed just as well as the younger participants on the tasks, yet they still rated their own abilities more pessimistically.
What is the difference between local and global metacognition?
Local metacognition involves evaluating performance on a single, immediate trial, whereas global metacognition involves assessing one's overall ability or performance across an entire task.
How did the study confirm that metacognition is domain-general?
Participants who had high metacognitive efficiency on the memory task also tended to have high metacognitive efficiency on the perception task, showing a strong positive correlation across different cognitive domains.
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