Attention and response inhibition (performance metrics)
DCAIT-1 (Dual-Condition Attention and Inhibition Task)
The first research instrument in the Attentis stack. Brief shape stimuli appear with an internal feature (dot or vertical line). Depending on condition, participants respond to a critical target (vigilance) or withhold on that target (inhibition). Trial-level timing and accuracy support objective review. Never automated diagnosis.
Stimulus examples
- Shape set. Circle, square, triangle, or diamond outlines. Culturally light geometric forms.
- Internal feature. Each shape carries either a centered dot or a centered vertical line so targets are not color-only.
- Critical target (default). Default critical stimulus is diamond with centered dot (diamond_dot). Other catalog items serve as distractors.
- Condition contrast. Vigilance: respond to the critical stimulus. Inhibition: withhold on the critical stimulus and respond to others. Additional blocks extend the dual-condition design under research protocols.

Experimental / pilot performance task. Complements clinical evaluation; does not diagnose ADHD.
