516. What is the purpose of randomization? What is stratified randomization, and its purpose? What is a confounding factor? What is publication bias? What is type I error, type II error, alpha, beta? October 25th, 2008 by reuben in EBM Back Top Tags: card 515. Define clinical decision rule, clinical pathway / What is the difference between a pathway and a protocol? / List different types of clinical studies 517. Implementation of an RCT (9 steps) with associated potential weaknesses Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.