After a goal is lost, the action may stop or get replaced by a more salient one

What it is

Once a goal representation decays past the point of dropping away, behavior doesn't always simply stop — the original goal is gone, but the person often doesn't just stand there; instead, they follow whatever is more salient or easier to activate in the current environment and go on to do something else, sometimes without even realizing afterward that they've drifted from their original intent. This is a different outcome from the action stalling outright: the stalling case is easy for the person to notice themselves (walking into a room and just standing there blankly), while the displacement case is not (walking into a room and getting on with something else, only remembering the original errand much later), because the behavior looks continuous and purposeful the whole time — only the purpose has quietly changed.

Why it happens

Behavior is produced by whichever currently activated goal has the highest strength getting cashed out first. The original goal decaying past dropout doesn't mean the person is now in a goal-free vacuum — the environment usually holds other candidate goals already being perceived or associated at the same time, and once the original goal's strength falls below theirs, control over behavior simply shifts to them. That shift is seamless from the person's own subjective standpoint, with no felt sense of "switching," because the underlying decision mechanism was always "execute whichever has the highest strength" — which goal happens to be on top changes, but the behavioral logic doesn't.

Studying it

Distinguishing "the action stopped" from "the goal got replaced" requires a case record that captures what the person actually went on to do afterward, not just whether the original intent was completed. Tracking only whether the original intent was fulfilled lumps the displacement outcome in with "an error occurred," obscuring its essential behavioral difference from a pure stall — in the displacement case the person can, after the fact, report a specific different thing they actually did, while in the stall case they usually can only report a blank stretch of behavior. This distinction matters for post-hoc review, because the two point to different kinds of intervention.

Where it stops holding

Goal displacement only occurs when other candidate goals genuinely exist in the environment and their activation strength is enough to exceed the original goal's residual strength — if the decay happens in a relatively "empty" situation with no candidate goal available to take over, the original goal dropping away is far more likely to show up as a stall than as a displacement. This means whether displacement is observed depends heavily on what happens to be in the surrounding environment at the moment the original goal drops away, not solely on the person's own cognitive traits.

Related

• Same group: A10.12.1 Mid-sequence, the goal representation driving an action gradually decays until it is lost · A10.12.3 Interruption and delay are the main triggers of activation loss · A10.12.4 Keeping a goal visible or providing progress cues maintains its representation
• Nearby: A10.11 Associative-activation errors · A10.05 Capture errors
• Search terms: goal displacement · attentional capture · activation strength