Visual Oddball

Visual Oddball is a simple, interactive iOS app that demonstrates visual attention and reaction time using a classic target-detection task. Users respond to a designated target color while ignoring non-target stimuli. Circles appear briefly on screen with variable timing, encouraging focused attention and rapid responses. At the end of each session, the app provides clear performance summaries and allows optional data export for personal review. Visual Oddball is designed for educational and demonstration purposes, making it useful for students, instructors, and anyone interested in how attention and response timing work in a simple, hands-on way. Key Features Adjustable number of trials and blocks Configurable target probability Brief stimulus presentation with variable timing Reaction time measurement Summary accuracy and response metrics Optional CSV export for offline viewing Visual Oddball runs entirely on-device and does not require an internet connection. Important Notes Visual Oddball is not a diagnostic or clinical tool. The app does not collect personal data or require an account. All interaction and data remain local to the device unless the user chooses to export results.