This randomized controlled trial evaluates whether a digital, video-based clinical-reasoning simulation improves clinical-reasoning performance compared with conventional lecture-based teaching across multiple clinical disciplines, including orthopedics and ophthalmology.

Within each discipline, participants are randomly allocated 1:1 to an intervention group or a control group. The intervention group learns the assigned topic through an interactive, web-based simulation built on real patient video cases with structured clinical-reasoning steps. The control group receives the same learning objectives and content through a standard didactic lecture, over a comparable duration.

After the learning session, all participants complete the same set of standardized clinical scenarios, scored with a predefined rubric. The primary outcome is the post-intervention clinical-reasoning score. Secondary outcomes include diagnostic accuracy, confidence, and satisfaction.

The trial uses a shared protocol across discipline-specific cohorts to allow consistent, pre-specified comparison of simulation-based versus lecture-based instruction.

Background. Clinical reasoning is a core competency across medical disciplines, yet traditional lectures offer limited interactive practice. A digital simulation using authentic patient cases may strengthen reasoning, but comparative evidence is limited.

Objective. To compare a digital, video-based clinical-reasoning simulation with conventional lecture-based teaching on clinical-reasoning performance, using a single shared design applied across discipline-specific cohorts (e.g., orthopedics, ophthalmology, paediatrics).

Design. Single-center, parallel-group, two-arm randomized controlled trial with 1:1 allocation, replicated as pre-specified cohorts by clinical discipline under one common protocol.

Participants. Eligible learners (medical students / residents) within each discipline-specific cohort at primarily Altinbas University.

Randomization. Computer-generated 1:1 randomization performed separately within each cohort; outcome assessors blinded to allocation.

Interventions. Intervention - interactive, web-based clinical-reasoning simulation using real patient video cases with structured reasoning steps. Control - didactic lecture delivering identical learning objectives and content over a comparable duration.

Outcomes. Primary - post-intervention clinical-reasoning score on standardized scenarios rated with a predefined rubric. Secondary - diagnostic accuracy, participant confidence, satisfaction.

Cohorts & analysis. Each discipline-specific cohort is analyzed separately with an independent-samples t-test; inter-rater reliability assessed where applicable. Total target enrollment (n=250) across all cohorts.

Inclusion Criteria:

• Enrolled as a [final-year medical student / resident] in the relevant discipline (orthopedics or ophthalmology) at the participating institution
• Completed the baseline orientation and agreed to participate
• Available for the full learning session and the post-session assessment

Exclusion Criteria:

• Prior completion of the same simulation module or equivalent structured training on the topic
• Did not complete the assigned learning session
• Incomplete post-session assessment data