Scared in the Body, Not Just the Mind

The Critical Role of Mental Imagery in Human Emotion: Insights from Fear-Based Imagery and Aphantasia

Marcus Wicken, Rebecca Keogh, and Joel Pearson. Proceedings of the Royal Society B. 2021.

The Question

Mental imagery is supposed to be an emotional amplifier. When you read a scary story, your brain simulates the scene and your body reacts. But what happens when someone cannot generate that visual simulation at all? This study asked whether people with aphantasia would show the same physical fear response as everyone else when imagining frightening scenarios.

The Discovery

Researchers had participants with aphantasia and participants with typical imagery read first-person scary stories while measuring skin conductance, a reliable physical indicator of arousal and fear. The aphantasic group showed a flat-line response. Their bodies barely reacted. The typical imagers showed a clear and significant spike. Then the researchers ran a second experiment. This time, both groups viewed actual frightening photographs instead of reading imagined scenarios. The result flipped. Both groups responded equally. There was no difference in how their bodies reacted to real scary images. The study also checked trait anxiety levels going in and found both groups were equivalent.

Insight

This study gave researchers the first direct physical evidence that imagery functions as a genuine amplifier of emotional thought. For people with aphantasia, the emotional system responds fully to what is actually seen. The pathway that turns imagined scenarios into physical arousal simply does not fire the same way.

If you remember one thing

People with aphantasia are not emotionally numb. They respond to real scary things just like everyone else. What changes is the body-level fear surge that comes specifically from imagining frightening scenarios.

The Connection

The No Picture Needed paper describes aphantasia as a difference in how the brain accesses information, not a deficit in feeling. This study backs that up with physical data. A student with aphantasia who seems unbothered by a stressful upcoming event is not being careless. They may simply not be able to pre-live the anxiety in their body the way a visualizer can. That is worth knowing before you tell them to just imagine how great it will feel when it is over.

You can read the full paper by clicking here.