After SHORT training: execution is disrupted (a non-habit goal-directed system “loses battle” but leaves a signature)
After EXTENSIVE training: execution stays smooth (habit fully consolidated)
(13/X)

BUT: Motor automaticity (inter-press-interval consistency of action sequences) inversely predicted habit expression.
Higher automaticity = LESS habit, regardless of training duration (short and extensive are similar).
(8/X)

DISCOVERY STUDY (N=193 subjects):
We compared two training lengths (short vs. extensive).
Extensive training → increased habitual responding ✓
This simple effect is actually not easy to show in humans. It validates that the new paradigm is showing a solid baseline effect.
(7/X)

How we discovered this:
We started by designing a novel dual-task paradigm that burdens cognitive mechanisms dedicated to planning and goal-processing at the moment of action.
(5/X)