Researchers are trying to understand the effect of educating patients and encouraging shared decision making on rates of CT scanning in head injured patients by using an already developed app and observing the effect on the health care provider.

Inclusion Criteria:

• 18-65 years old
• Present to the Emergency Department with a blunt head injury within the past 24 hours
• Determined to be low risk by the Canadian CT Head Rules (CCHR), and are being considered for a head CT by the treating provider.

Exclusion Criteria:

• Patients who are pregnant
• Non-English speaking
• In police custody
• Undergoing psychiatric evaluation
• Found to have drug or alcohol intoxication