Do You Catch Goals From People You Watch? The Goal Contagion Experiments

Participants in the original goal contagion studies read a short account of a person working on a farm, either as a volunteer or for money. A computer then asked them to do a mouse-click task, a different activity in a different setting, and the people who had read about the paid worker acted on the goal of earning money, which no one had asked them to pursue. That is the core claim of “Goal contagion: Perceiving is for pursuing,” by Henk Aarts, Peter Gollwitzer and Ran Hassin, published in the Journal of Personality and Social Psychology in 2004 (volume 87, pages 23-37): people can adopt a goal they infer from someone else’s behavior, without deciding to. The effect is real in the lab, small once publication bias is considered, and untested over months of real life.

What the 2004 experiments did

The paper reports six studies. The shared recipe was brief exposure to behavior that implied a goal, followed by a chance to act on that goal somewhere else. The farm story is the version most often described: the volunteer and the paid worker did the same physical work, and only the paid one implied a money goal. Participants were not asked to pursue anything, and the second task looked unrelated.

Per-study sample sizes and scoring details are in the paper itself and are not quoted here. The title carries the idea: perceiving what someone does is a step toward pursuing the same thing yourself.

The paper also found a limit. When the observed person pursued the goal in a way participants judged unacceptable, the goal was not adopted. Contagion is selective about what it catches.

What came after

Two follow-ups sharpen the picture. Dik and Aarts (2007, Journal of Experimental Social Psychology) reported that perceiving effort in another person’s behavior made it easier to infer their goal and to catch it. A person visibly working for something seems to broadcast the goal more clearly than someone drifting toward it.

Loersch, Aarts, Payne and Jefferis (2008, same journal) added the social side. Participants watched a video of two racquetball players who acted cooperatively or competitively, and the players were described as students from either the participants’ own university or a different one. The effect appeared for participants who thought the players were from their own university. In other words, the people you see as part of your group are the ones whose goals travel.

How solid is it?

A 2021 meta-analysis by Brohmer, Eckerstorfer, van Aert and Corcoran (International Review of Social Psychology) pooled 48 effects from 4,751 participants, including unpublished studies and registered reports. The summary effect was small, g = 0.30 (95% CI 0.21 to 0.40). After correcting for signs of publication bias, one selection model put it closer to half that, g = 0.15, with an interval (-0.02 to 0.32) that includes zero.

No large preregistered replication of the original farm study alone turned up in a search. The fair reading is that goal contagion probably occurs for some people in some conditions, and that the early literature overstated it.

Goal contagion is also not the same claim as the network research on habits, which is covered in this earlier piece on habit contagion. That work analyses who becomes like whom over years in observational data. Goal contagion experiments are short, randomized and about a single inferred goal.

What the experiments don’t show

Three limits matter before anyone redesigns a social life around this.

First, duration. The paradigm measures behavior soon after exposure. No study I know of tracks whether a caught goal turns into a durable habit.

Second, direction. A field study of 132 overweight or obese people in weekly weight-loss classes (Reynolds, Webb, McCulloch and Fitzsimons, British Journal of Health Psychology, 2019) found that watching others make good progress went with stronger intentions and good feelings, and also with losing less weight the following week. The authors suggest part of the reason is that people felt as though they had progressed themselves, which they call vicarious goal satiation. Watching can substitute for doing.

Third, kind of evidence. Nobody has tested whether seeing a friend’s early-morning proof on a phone makes you get up. The experiments use stories, videos and live observation.

Three small ways to stand near the behavior

The finding, even at its modest size, supports a cheap rule: put the behavior you want in front of you, and attach a plan so it does not turn into spectating.

Watch proof, then do one thing. If a friend posts proof that they are up at 6:15, watch it, then move your own alarm ten minutes earlier that same day. The step guards against the satiation result above.

Join one person’s early thing. A friend’s 6:30 swim, a walking group, a library session before work. A standing arrangement lets you see the effort itself, which is what Dik and Aarts found carried the goal.

Put a visible example on your calendar. Create an event named for a real person and the activity, “Sam’s 6:00 run,” in the slot you want, and treat it as a reminder of what the goal looks like in someone else’s week. Choose people whose pursuit you respect; the 2004 acceptability finding suggests it matters. For how hard to make the target, the 85% rule research is a useful guide.

Where watching friends fits

DontSnooze is an iOS app where you record a video within 30 seconds of your alarm or a random camera-roll photo goes to your friends for 48 hours (more on that in how the app works). Watching friends’ proof is free; posting your own needs Pro ($8.99 a week, $17.99 a month or $59.99 a year). A feed of friends’ mornings is a feed of visible goal pursuit, and you can scroll it without paying. The research above does not test the app, and it does not show that watching a feed changes anyone’s habits. It is a reasonable way to keep the behavior in view, and whether friends really watch is a separate question.

A friend group tends to run through stages, and Tuckman’s model applied to friends suggests which plan fits which stage.