YSPH Biostatistics Seminar: "22 SHORT TALKS ABOUT EXTERNAL VALIDITY: A Whistlestop Tour"

BIS 526 students are required to attend in person. Others are allowed to attend in person but may also attend via zoom.

Speaker- Daniel Westreich, Ph.D.

Title: "22 SHORT TALKS ABOUT EXTERNAL VALIDITY: A Whistlestop Tour"

Abstract:

In this talk, I will give a whirlwind overview of ideas and perspectives in the study of external validity. Topics will include an introduction to target validity; the thought experiment of a doubly randomized trial; a proposed schema encompassing both generalizability and transportability; a clarification of how inverse odds of sampling weights relate to transportability and generalizability; an argument from bounding about why external validity is of greater concern than internal validity; a potential outcomes approach to understanding when risk differences, or risk ratios, might be expected to naively generalize; and thoughts on what the generalizability literature has to say (if anything) about model cross-validation. Along the way, expect poetry, references to everything from the Simpsons to Yale a cappella groups, and at least one joke.