Your brain predicts your reality before you experience it. MindMirror reveals those predictions, your priors, so you can update the patterns that keep you stuck.
Track thoughts, feelings, and body states. Receive increasingly personalized predictions and recommendations based on your unique patterns.
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THE SCIENCE
Predictive Processing and
Active Inference
Your brain does not wait for things to happen. It predicts them. Every thought, feeling, and sensation is shaped by internal models called priors, built from a lifetime of experience. This is predictive processing: perception as prediction. When reality matches, you barely notice. When it does not, you feel surprise, anxiety, or discomfort: a prediction error.
But the brain does not stop at perception. Through active inference, it also acts to make predictions come true: avoiding situations, seeking confirming evidence, behaving in ways that fulfill the prophecy. This is why negative priors like "I will mess up" or "People will judge me" do not just describe reality. They create it.
Active inference unifies perception and action: we either update our internal models to match the world, or we act on the world to match our models. Both minimize surprise.
Friston, K. (2010). The free-energy principle: A unified brain theory? Nature Reviews Neuroscience, 11(2), 127–138.
WHAT WE TRACK & WHY
Why We Ask About Each Layer
YOUR BRAIN'S RUNNING COMMENTARY
Thoughts
Thoughts reveal your priors in action. "I'm going to fail" isn't just a thought. It's a prediction your brain generated based on past experience. Tracking thoughts makes invisible predictions visible.
Clark, A. (2015). Surfing Uncertainty. Oxford University Press.
PREDICTIONS ABOUT YOUR BODY'S STATE
Feelings
Emotions aren't reactions. They're predictions. Your brain constructs feelings by predicting what bodily sensations mean in context. Tracking emotions reveals which predictions your brain defaults to.
Barrett, L. F. (2017). How Emotions Are Made. Houghton Mifflin Harcourt.
THE INTEROCEPTIVE SIGNAL
Body Sensations
Chest tightness, stomach knots, shallow breathing. Your body sends signals that shape emotional predictions. Somatic awareness helps you notice and interrupt automatic patterns.
Seth, A. K. & Friston, K. J. (2016). Phil. Trans. R. Soc. B, 371(1708).
SLEEP, CYCLE & HEALTH FACTORS
Body State
When dysregulated (poor sleep, hormonal shifts, illness) negative priors become rigid and resistant to updating. Tracking physical state reveals when your brain is most open to change.
Friston, K. J. et al. (2014). The Lancet Psychiatry, 1(2), 148–158.
RESEARCH
What the Evidence Shows
Grounded in peer-reviewed neuroscience on how the brain predicts, acts, and updates.
Predictive Processing & Anxiety
Anxiety involves overly precise negative priors that resist updating. The brain over-weights its predictions, making prediction errors feel more threatening.
Paulus, M. P. et al. (2019). Biological Psychiatry: CNNI, 4(5), 483–491.
The Free Energy Principle
All adaptive systems minimize surprise by updating beliefs or acting to confirm predictions. This unifies predictive processing and active inference under one framework.
Friston, K. (2010). Nature Reviews Neuroscience, 11(2), 127–138.
Emotions as Predictions
Emotions are not hardwired reactions but predictions constructed from past experience. The brain predicts what bodily sensations mean in context.
Barrett, L. F. (2017). How Emotions Are Made. Houghton Mifflin Harcourt.
Surprise & Psychotherapy
Therapeutic change occurs through 'benign surprises': positive prediction errors that update entrenched negative priors when the nervous system is regulated.
Holmes, J. & Nolte, T. (2019). Frontiers in Psychology, 10, 592.
Interoception & Active Inference
Active interoceptive inference links body states to emotional experience and action. Tracking body signals helps interrupt automatic behavioral responses.
Seth, A. K. & Friston, K. J. (2016). Phil. Trans. R. Soc. B, 371(1708).
Psychedelics & Prior Relaxation
Psychedelics may work by relaxing the precision of rigid priors, allowing the brain to update deep-seated beliefs that normally resist change.
Carhart-Harris, R. L. & Friston, K. J. (2019). Pharmacological Reviews, 71(3).
THE MODEL
How MindMirror Works
Track
Log situations, thoughts, feelings, body sensations, and physical state. Or import your existing paper journal.
Reveal
MindMirror identifies your priors: "In social situations, you feel anxious 78% of the time." See the patterns running on autopilot.
Notice
With predictions made visible, consciously notice when reality doesn't match. This creates prediction errors, the brain's mechanism for updating beliefs.
Update
Repeated awareness of mismatches allows your brain to naturally update its priors. No forcing. Just awareness and a regulated nervous system.
WHO IS THIS FOR
Built for People Who Want to Understand
People with anxiety or depression
If negative predictions feel automatic and unchangeable, MindMirror helps you see them for what they are. Predictions, not facts.
Anyone in therapy
Track patterns between sessions. Bring your therapist data, not just memories. See what's actually happening over time.
The self-aware & curious
You know your patterns exist. Now see them in data. Understand why you react the way you do, and what your body has to do with it.
Existing journalers
Already journal on paper? Import your entries and get instant insights from months of writing you've already done.
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