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Story summary
- Johns Hopkins researchers found mice switched from goal-directed to habitual behavior after about three trials.
- Mice learned to lick for water on one tone and to withhold licking on another while drinking sour water.
- Recordings showed reward signals fell sharply as cue signals sharpened at the habit switch, with dorsolateral striatum activity already present and sated mice reducing licking before the switch but keeping responding afterward, indicating a cue-driven habit.
