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Stimulus

Trigger

A stimulus is any input — external or internal — that prompts a human response. It is the starting point of experience: the raw event before it has been given any meaning.

In plain language

Something happens. That's the stimulus. It hasn't meant anything yet — it's just the thing that occurred.

Duration

Instantaneous — a single moment or event

Origin

The world around you, your body, or your own thoughts

Purpose

To provide the raw material of experience. Without a stimulus there is nothing to interpret, and therefore nothing to feel.

Characteristics

Neutral until interpreted
Can be external (a sound, a comment) or internal (a memory, a pain)
Precedes every emotion
Objective — it is what actually happened

Examples

A friend does not reply to your messageRain begins to fallA stranger frowns at youA memory surfaces unexpectedly

Real-life situations

A late reply

Your message is left on read for six hours. That is the stimulus. Whether it means rejection or a busy day is not part of the stimulus itself.

A raised voice

Someone speaks to you loudly. The raised voice is the stimulus — the interpretation of anger, urgency, or excitement comes next.

Common confusion

Everyday language

That made me angry.

More precisely

That was the stimulus; my interpretation produced the anger.

A stimulus cannot directly create an emotion. It must first pass through interpretation. The same stimulus can produce very different emotions in different people.

Relationships

Quiz yourself

Which of these is purely a stimulus?