Theory of constructed emotion
Stated in full in Barrett (2017); the renamed successor to the conceptual act theory. See lisa-feldman-barrett.
The wiki met this theory backwards. Barrett has been present since the first ingest as the person who says emotions are not natural kinds, that autonomic-specificity is not there, that no brain region is consistent-and-specific for a category — always the negative claim, always in a paper written by someone else or in a meta-analysis (lindquist-2012-brain-basis-of-emotion) framed as a test of the rival. This page is what the theory says when it is not busy denying something.
The derivation, in order
The theory is presented as a deduction, and it is easier to hold if kept in sequence. Each step is supposed to follow from the one above.
- A brain is for allostasis — anticipating the body’s resource needs and meeting them before they arise. Not for rationality, happiness or accurate perception.
- To regulate a system, you must model it. So the brain runs an internal model of the body in the world.
- The model is built from the body’s perspective, because modelling the world in a detached, disembodied way “would be metabolically reckless.” So the model necessarily includes the internal milieu: interoception is at the core of the internal model, not an addition to it.
- The model is predictive, not reactive. Predictions cascade down; prediction errors ascend and update (predictive-coding, active-inference).
- Predictions are concepts. Completed predictions are categorizations.
- The consequences for allostasis are made available to consciousness as affect — valence and arousal, which are “basic features of consciousness” and not unique to emotion. See core-affect.
- When the concept doing the categorizing is an emotion concept, the categorization is an instance of emotion.
Step 7 is the whole theory. Everything distinctive follows from the fact that it is step seven — emotion arrives last, as a special case of a general-purpose process, rather than first, as a thing with its own machinery.
What it denies, and what it does not
Barrett devotes a numbered list of eight disclaimers to this, which is itself evidence about how the theory gets read. The three that matter most for this wiki:
Emotions are not illusions. The load-bearing analogy is money: the objects that have served as currency throughout human history “share no physical similarities,” yet money is entirely real. Emotion categories are real in that way — real, perceiver-dependent, not physically constituted. Anyone reading constructionism as eliminativism has the wrong theory in view. (Compare Scarantino’s diagnosis that folk emotion categories were coined “to negotiate social transactions among language users” — the two are closer here than their dispute suggests.)
Animals are not emotionless. “‘Is the fly fearful?’ is not a scientific question, but ‘Does a human perceive fear in the fly?’ and ‘Does the fly feel fear?’ can be answered scientifically (and the answers are ‘yes’ and ‘no’).” And explicitly: the fly may still feel affect. See can-we-know-animal-feelings.
Subcortical regions are not irrelevant. An instance of emotion “engages the pattern generators for whatever actions are functional in the context.” The theory needs pattern generators; it denies only that they are organized by emotion category.
Why no emotion category has a signature
Because of degeneracy: dissimilar neural populations give rise to instances of the same category, so “it is unlikely that all instances of an emotion category share a set of core features (i.e. a single facial expression, autonomic pattern or set of neurons).” The summary representation of a category is an abstraction that “need not exist in nature.”
This is Darwin’s move, and Barrett says so: a species is a population of variable individuals grouped by function, not a type with shared features. Emotion categories are conceptual categories in exactly that sense.
The consequence for measurement is the sharpest thing the theory says about method: a pattern that diagnoses sadness across a sample is not the brain state for sadness. It is a statistical summary of highly variable instances, and “the voxels that make up a pattern for a category need not [be] observed in every (or even any) single instance.” The average US family has 3.14 people; no family does.
Relation to the other predictive accounts in this wiki
The theory is not in competition with Seth’s interoceptive inference — it is the same machinery with a different explanatory target and a stronger claim about scope.
| Seth / Seth & Friston | Barrett | |
|---|---|---|
| what interoception is for | inferring the hidden causes of visceral signals; regulating them by active inference | budgeting the body — interoception arises from allostasis |
| the agranular cortex argument | AIC/ACC/SGC/OFC send predictions (visceromotor-areas) | same, extended: the gradient is continuous, so interoceptive cortex predicts exteroceptive cortex too |
| what emotion is | an interoceptive inference | a categorization, of which interoceptive inference is one ingredient |
| scope | emotion and the embodied self | all perception and action, of which emotion is a special case |
They agree on more than either says. Neither cites the other’s central claim as a rival. The real difference is that Seth explains emotion by interoception, while Barrett explains both by allostasis, and then denies that emotion is a separate thing to be explained.
The unresolved cost
Recorded here rather than buried: nothing in the imaging or psychophysiological record can now disconfirm this theory, because degeneracy predicts that instances will not share features, and that is what the data show. This is structurally identical to the objection the wiki records on homeostatic-property-cluster-kinds against Scarantino’s New BET — from the opposite side of the same dispute. Both of the wiki’s most sophisticated positions on emotion categories have made variability a prediction, which means the data that were supposed to adjudicate between them can no longer do it.
Barrett’s response is to reframe the complaint: a new paradigm “barely gets started before it is criticized for not providing all the answers,” and raising more questions than it answers is “a feature, not a bug.” That is true of early paradigms in general and is not an answer about this one. What would count against the theory of constructed emotion is not stated in the source.