Off-script Diagnosis & Differential Diagnosis (D&D) Training and Residents' Stroke Knowledge

This study is a single-center, randomized, open-label, controlled, endpoint-blinded study to assess the effect of off-script diagnosis \& differential diagnosis (D\&D) training in improving the residents' knowledge of acute ischemic stroke in China. The investigators will enroll 22 residents and assess the score of mASMaQ 30 days after randomization.

Inclusion Criteria: 1. Residents (physicians in postgraduate training). 2. Currently in neurology wards 3. Managing acute ischemic stroke (AIS) patients, defined as: 1)Time from onset to randomization ≤ 2 weeks; 2) If onset time is unknown, the last known well time is considered the onset time. 4. Signed informed consent Exclusion Criteria: 1. Managing asymptomatic ischemic stroke patients. 2. Residents who are currently participating or have participated in another interventional ischemic stroke training program within the past 3 months.