Experimental Design Analysis

Tackle advanced challenges in experimental design by analyzing blinding procedures, operationalization decisions, ecological validity, randomization failures, and the replication crisis through detailed real-world research scenarios. You will build the ability to spot subtle methodological weaknesses that can invalidate even well-intentioned, well-funded studies and to evaluate whether a study's conclusions actually follow from its design.

advanced20 minScientific Reasoning

Question 1 of 617% Complete

A medical school is testing whether a new minimally invasive surgical technique for knee cartilage repair reduces recovery time compared to the standard open procedure. Patients are randomly assigned to receive either the new (n = 85) or standard (n = 87) surgery. Surgeons obviously know which technique they perform. The physical therapists evaluating recovery milestones (range of motion, weight-bearing ability, return to activity) also know each patient's surgical group. A biostatistician reviewing the protocol says the study needs partial blinding. What specific bias concerns her most, and what is the best feasible solution?