Stanley Schachter

Introduction

Stanley Schachter (1922–1997) was an American social psychologist who took three questions that seemed to belong to three different fields — how emotions are made, why frightened people seek company, and why some people keep eating after they are full — and answered them all with the same idea: the body provides undifferentiated arousal, and the mind provides the interpretation.

The 1962 experiment he ran with Jerome Singer, in which participants were injected with adrenaline and then left with a confederate who acted either euphoric or furious, is among the most cited in the history of social psychology. Its conclusion was that a racing heart has no emotional content of its own; what you feel depends on what you conclude your racing heart is about.

The theory that came out of it turned out to be wrong in several important respects, and the story of how it failed is as instructive as the theory. But the framework it established — that emotion is not a read-out of the body but an interpretation of it — reorganised the field, and every modern appraisal theory of emotion is a descendant of it.

Early Life and Education

Schachter was born in 1922 in Flushing, New York, to Russian Jewish immigrant parents. He studied at Yale, taking his bachelor's degree in 1942 and a master's in 1944, before moving to the University of Michigan, where he completed his doctorate in 1949 under Leon Festinger.

His doctoral training sat in Festinger's Lewinian tradition of group dynamics rather than in the drive-reduction behaviourism that then dominated American departments, and that training shaped the central figure he became in the cognitive turn in emotion research. Where the behaviourist frameworks treated the organism as pushed around by internal drives, Schachter's treated it as an interpreter.

After Michigan he followed Festinger to the University of Minnesota, and worked at Swarthmore with Solomon Asch. Both mattered. From Festinger he took the idea that people search their social environment to evaluate their own internal states — Festinger's social comparison theory is the direct ancestor of Schachter's affiliation work. From Asch he took a taste for experiments whose design does conceptual work, in which the manipulation is the argument.

Academic and Professional Career

Schachter held appointments at the University of Minnesota and, from 1961, at Columbia University, where he spent the remainder of his career and where he became one of the most influential mentors in social psychology. He remained at Columbia until his retirement and died in 1997.

His career falls into three phases, each of which looks like a different psychologist's work. The 1950s produced the group-dynamics and affiliation research. The 1960s produced the emotion theory and the obesity work. The 1970s and 1980s turned to smoking and nicotine. The unifying question across all three was how much of inner experience comes from signals inside the body and how much from the situation the body is in.

Major Contributions to Psychology

Deviation, rejection and communication

Schachter's 1951 monograph, drawn from his dissertation work, examined what groups do to members who deviate from the group's position. He found a progression: the group first increases communication toward the deviate, attempting to change their mind; if that fails, communication drops off sharply and the deviate is rejected and socially isolated.

This matters because it established that rejection is the endpoint of a failed influence process rather than a direct response to disagreement. Conformity pressure is not primarily about punishing deviance; it is about recruiting the deviate, and rejection is what happens when recruitment fails.

The psychology of affiliation

In The Psychology of Affiliation (1959), Schachter asked a question with an obvious answer: why do frightened people want company? The obvious answer is comfort. Schachter's answer was more specific — anxious people want company specifically with others facing the same threat, and the reason is that they need to compare their own reaction against someone else's in order to know how frightened to be. Misery loves miserable company, and it loves it for epistemic reasons, not emotional ones.

His most famous demonstration compared firstborn and later-born children. Firstborns, waiting to receive an electric shock, strongly preferred to wait with others; later-borns were markedly less affiliative. The interpretation was that firstborns, having been the sole child in the family for a period, have a stronger habit of using others as a reference for their own state. The birth-order finding is contested, but the core result — that uncertainty about one's own internal state drives affiliation — has held up and now underpins much of the literature on social support.

The two-factor theory of emotion

The Schachter–Singer experiment of 1962 is the one that made his name. Participants were told they were receiving a vitamin injection to test its effect on vision, and were actually given either adrenaline or a placebo. Some were informed about the drug's real effects, some were misinformed, and some were told nothing. Each was then placed in a room with a confederate who either behaved euphorically — playing with paper, shooting hoops into a wastebasket — or angrily, eventually storming out.

The results: participants with unexplained arousal were strongly influenced by the confederate's behaviour, while those who had been correctly informed about the drug's effects were not. Given the same physiological state, people reported feeling happy or angry depending on what the situation gave them to attribute it to.

The theory extracted from this has two components. First, physiological arousal is undifferentiated — fear and excitement feel the same from the neck down. Second, the specific emotion is determined by a cognitive label applied to that arousal on the basis of situational cues. Neither component alone is sufficient: arousal without a label is agitation, and a label without arousal is a judgement rather than a feeling.

This was a direct challenge to James–Lange, which held that emotion is the perception of bodily change, and to Cannon–Bard, which held that physiological arousal and emotional experience are simultaneous and independent. Schachter made cognition causally central, and the field reorganised around the question of how appraisal works.

The externality hypothesis of obesity

From the late 1960s, Schachter applied the same logic to eating. If internal cues are vague and external cues are what people actually use, then obesity might reflect heightened responsiveness to external food cues rather than a metabolic abnormality.

His studies found that people with obesity ate similar amounts whether or not they had recently eaten, whereas those without adjusted intake according to internal satiety. Obese participants' consumption was driven by the salience, palatability, proximity, and apparent time of day of food, not by how full they were.

Nicotine regulation

In the 1970s Schachter turned to smoking, proposing that smokers regulate nicotine levels in a manner analogous to a set point: they smoke to maintain a level, and stress increases consumption by altering the rate at which nicotine is metabolised. This work was among the first to treat cigarette smoking as pharmacological self-administration rather than a habit.

Major Publications

Social Pressures in Informal Groups (1950, with Leon Festinger and Kurt Back)
Deviation, Rejection and Communication (1951)
The Psychology of Affiliation (1959)
Cognitive, Social and Physiological Determinants of Emotional State (1962, with Jerome Singer) — the two-factor paper
Emotion, Obesity and Crime (1971)
Obese Humans and Rats (1974, with Judith Rodin)

Impact and Legacy

Schachter's influence is unusually broad because he changed the question rather than answering it. After 1962, emotion research was a cognitive problem: the interesting work was on how appraisal, attribution, and interpretation generate emotional experience. Every appraisal theory that followed — Lazarus's in particular — is built on ground Schachter cleared.

The practical descendants are everywhere. The misattribution of arousal paradigm generated decades of research, most famously Dutton and Aron's 1974 Capilano Canyon suspension bridge study, in which men who had just crossed a frightening bridge were more attracted to a woman they met on the far side. The finding that anxiety can be relabelled as excitement is now a standard clinical and performance technique: arousal reappraisal instructions ("get excited") outperform relaxation instructions in public speaking, negotiation, and mathematics testing.

The obesity work reframed eating as responsive to environmental cues, which is the premise of essentially all modern environmental and policy approaches to diet — portion size, food proximity, packaging, and marketing.

Criticism — and it is substantial. The two-factor theory is now generally regarded as not supported in its original form, on several independent grounds.

The first is empirical. Reisenzein's 1983 reanalysis of the Schachter–Singer data found the results were much weaker than reported, that several conditions failed to produce the predicted differences, and that the published conclusions depended on selective comparisons. Later attempts to replicate the core effect produced inconsistent results, and the specific design has never been successfully reproduced in full. Marshall and Zimbardo's 1979 attempt to produce emotion by misattributing arousal largely failed, as did Maslach's 1979 study using hypnotically induced arousal.

The second is theoretical. The theory assumes arousal is undifferentiated, but it is not: distinct emotions have distinguishable autonomic signatures. Fear and anger produce different patterns of heart rate, skin conductance, and peripheral blood flow, and the evidence for this is now strong enough that the undifferentiation premise cannot be maintained as stated.

The third is Zajonc's (1980) argument that affective reactions can occur without any cognitive appraisal at all — that preferences need no inferences, and that feeling can precede and operate independently of knowing. This is not a minor amendment; it removes the necessity claim on which Schachter's theory rests.

The externality hypothesis has had a similar fate. Subsequent work showed that externality is not specific to obesity: normal-weight restrained eaters show it too. What looked like a property of body weight turned out to be a property of dietary restraint — a conclusion Schachter's own later position partly anticipated, and which shifted the field toward restraint theory and set-point models.

What survives is the general orientation: internal states are vague, and people use the situation to decide what they are feeling. The specific two-factor mechanism does not survive. That combination — wrong in detail, right in framing — is characteristic of the theories that reorganise a field.

Learn More

Leon Festinger — his collaborator, whose social comparison theory underlies the affiliation work
Cognitive Dissonance — the other great theory of how people reinterpret their own states
Attitudes — where appraisal and attribution research leads
Solomon Asch — the origin of the experimental style Schachter adopted

References

Schachter, S., & Singer, J. E. (1962). Cognitive, social, and physiological determinants of emotional state. Psychological Review, 69(5), 379-399.