Field experiments

Field experiments are randomized controlled experiments conducted in real-world environments rather than laboratory settings. In the study of social media and misinformation, field experiments provide causal evidence about how people actually behave online, circumventing the validity threats of lab studies.

Challenges in social media field experiments:

Platform constraints — Social media platforms limit researchers' ability to randomly assign interventions, message others, or analyze fine-grained behavior. Account suspensions or blocks can end studies prematurely.

Ethical review — Field experiments involving deception (e.g., bot accounts) or manipulation require careful IRB review. Some experiments operate in ethical gray zones.

Scale vs. power — Field experiments are expensive to run and often limited in sample size. Early platform blocking can force termination before target sample is reached.

Ecological validity — Field experiments on social media still operate in a constrained environment different from typical user behavior; results may not generalize to all users or platforms.

Key papers

• Shared partisanship dramatically increases social tie formation in a Twitter field experiment — Field experiment on Twitter testing causal effect of partisan preference on follow-back behavior; provides rare causal evidence on social tie formation