Reading focus
Syllabus: How Do Brain and Body Regulate Each Other?
Examine how the roadmap's distinctions become task scores, confidence measures, and questionnaire responses. The later critiques in the guide help separate the conceptual contribution from the limitations of particular methods.
A question to consider. A confident participant scores poorly on heartbeat–tone judgments. What would you check before concluding that the participant lacks awareness of their own accuracy?
Why this reading
Feeling attentive to one's body, performing a task accurately, and knowing when one's judgments are correct are different claims. Garfinkel and colleagues make those distinctions concrete with cardiac tasks, confidence judgments, and a questionnaire. The paper lets readers examine how a useful conceptual separation depends on the quality of the measures used to investigate it.
Before you read
The authors use interoceptive accuracy for performance on bodily-signal tasks, sensibility for subjective beliefs or reported experience, and awareness for metacognition—the correspondence between confidence and performance. These labels are their operational framework. Heartbeat tracking compares a count with recorded beats; discrimination asks whether tones coincide with heartbeats. A confidence–accuracy relationship concerns calibration, not merely feeling confident. A correlation does not establish that one capacity causes another.
Read for
- Match each construct to its task or questionnaire. Could someone succeed through knowledge, timing, or another strategy rather than the proposed sensory ability?
- Compare the relationships across the two cardiac tasks and the general questionnaire. What is lost when a task-specific measure becomes a claim about the whole body?
- Inspect the regression and median-split comparisons alongside the overall correlations. The proposed hierarchy requires more evidence than an association in a selected subgroup.
Consider afterwards
- Design a comparison that separates confidence in heartbeat perception from the ability to detect a bodily signal.
- If a task misclassifies an accurate perception as incorrect, what happens to an estimate of metacognitive awareness built from that score?
Editorial context
The study involved 80 healthy volunteers and does not establish a universal hierarchy across bodily systems. Later work materially qualifies its measurements: Desmedt et al. (2018) found that counting scores changed substantially when instructions discouraged estimation. Adams et al. (2026) showed how individual differences in perceived timing can conflict with fixed heartbeat–tone delays. That later analysis illustrates potential misclassification; it was not a direct replication of this study. The conceptual distinction remains worth examining, while the tasks should not be treated as unquestioned standards of accuracy.