Anxiety sensitivity

The belief that arousal sensations are dangerous. Enters the wiki with Van der Does et al. (2000), where it turns out to be the only thing that distinguishes people who can count their heartbeats from people who cannot.

Why it belongs on the interoception side of the wiki

Most constructs here concern the signal (how strong, how well detected, how mapped). Anxiety sensitivity concerns what the signal is taken to mean — and it is dissociable from every other candidate. In the 2000 pool of 709 participants, accurate perceivers scored about half a standard deviation higher on the ASI (26.9 vs 21.0 for inaccurate perceivers, F = 3.8, p = 0.02), replicating Van der Does et al. (1997) in an independent sample.

They did not differ on:

• trait anxiety (STAI)
• state anxiety
• depressive symptoms
• somatosensory amplification (SSAS)
• age, body mass index, or actual number of heartbeats during the trials

That list is the interesting part. Accurate perceivers are not more anxious, not more depressed, and — strikingly — not more prone to amplify somatic sensations in general. They specifically believe bodily arousal is harmful.

In the interoceptive-taxonomy’s terms this sits closest to sensibility (beliefs and self-report about one’s own interoception) rather than accuracy, and the finding is that the wiki’s canonical accuracy measure is partly indexing a sensibility construct. See interoceptive-trait-prediction-error, where accuracy/sensibility mismatch is proposed as a trait-level prediction error and reported as correlated with anxiety.

The reframing it licenses

Ehlers (1995) found that good heartbeat perception predicts poor treatment outcome and recurrence of panic after remission — the clinical result that made cardiac interoception matter to clinicians in the first place, and one of the sharpest “more is worse” data points in this wiki (is-more-interoceptive-awareness-better).

Van der Does et al. propose that anxiety sensitivity is why. If the heartbeat score partly indexes the belief that bodily sensations are harmful, then “good perceivers do worse in treatment” is not a fact about perceptual ability being bad for you. It is a fact about catastrophic beliefs about the body predicting poor outcome, which is unsurprising and which the heartbeat task is picking up by proxy.

That is a deflationary reading of an alarming finding, and it generalizes: any clinical result of the form “high interoceptive accuracy predicts worse X” is a candidate for the same treatment.

The confound it creates, which runs the other way

Anxiety sensitivity does not merely correlate with the score — it supplies a mechanism for earning the score without perceiving anything.

Van der Does et al.’s artefact argument: nearly every participant undercounts. A participant who is nervous during the test, and who expects a racing heart because they believe arousal is dangerous, will count faster. Counting faster, in a population that systematically undercounts, moves you closer to the true value. You score as an accurate perceiver by being frightened of your heart.

So anxiety sensitivity is simultaneously:

• the one trait that distinguishes accurate perceivers (an empirical finding), and
• a route to scoring as an accurate perceiver without perceiving (a proposed artefact).

These are not independent — the second explains the first, and if it is right the ASI difference is not a discovery about accurate perceivers but a symptom of the task’s failure mode. Recorded on is-the-heartbeat-counting-task-valid.

Distinct from trait anxiety, and the distinction does work

Worth stating because the two are easy to collapse and the wiki’s sources do not always keep them apart. Trait anxiety is a disposition to feel anxious. Anxiety sensitivity is a belief about what arousal means — you can be highly anxiety-sensitive without being especially anxious, and vice versa.

The 2000 data are a clean demonstration: accurate and inaccurate perceivers differ on the ASI and are indistinguishable on the STAI, in the same 709 people. Whatever the heartbeat task is tracking, it tracks the belief and not the affect.

Open

• Nothing in this wiki measures anxiety sensitivity alongside a non-cardiac interoceptive measure, so whether the ASI relationship is about interoception or about hearts specifically is untested here.
• The construct has an obvious relationship to the cognitive model of panic (catastrophic misinterpretation of bodily sensations is the model’s engine, and the ASI is close to a measure of the propensity to it) but the wiki has read no primary source on either.
• Its relationship to attachment-anxious interoceptive profiles — high noticing, low not-worrying (oldroyd-2019-attachment-interoception) — is unexplored and looks like the same phenomenon reached from developmental psychology.