Communication Science · Open Science · Replication

Building a More Reliable Foundation for Communication Science

The Global Initiative for Replication in Communication Science (REP-COM) is a community of scholars dedicated to the systematic replication of key empirical findings in communication research — across labs, countries, and cultures.

Why It Matters

The Case for Systematic Replication

Communication science shapes real-world campaigns, policy, and public understanding. Its findings must be robust.

Scale of the Problem

Many landmark communication studies are based on small samples with underpowered designs. Major findings shaping real-world campaigns have never been independently verified.

The REP-COM Approach

We run and endorse small scale, large-scale, preregistered, direct, and many-lab replication studies — An overall goal is to recruit labs across countries to test whether key effects hold across populations, cultures, and contexts.

Open Science by Default

All REP-COM projects are preregistered, open-access, and archived on OSF. Regardless of outcome, every replication is published — null results included.

About REP-COM

Building a Community

Communication science shapes how we understand media effects, health campaigns, privacy behavior, and social influence. Yet a surprisingly large share of its foundational studies have never been replicated. Most were tested in a single country, with a single population, in a single moment in time.

"In 2018, 267 communication scientists voted to identify the studies most in need of replication (Vermeulen et al., 2024). Witte (1994) emerged as a top priority. We are now making that replication happen as a large-scale many-lab effort, which means a replication across continents, languages, and cultures."

REP-COM was founded by a group of scholars committed to systematically, rigorously, and collaboratively replicate communication studies. We build international consortia spanning dozens of labs across Europe, the Americas, Africa, Asia, and Oceania, aim to secure funding, and coordinate replication designs that test whether communication effects hold not just in one place, but across the cultural and linguistic contexts in which our field's claims are meant to apply.

Meet the Founding Team
Participating country
Current Projects

Current Replication Projects

Active — Launching May 2026

The Robustness of Fear Appeals: A Multilab Registered Replication Study

Witte's Extended Parallel Process Model (EPPM) is one of the most cited theories in health communication. Taught in textbooks worldwide, it has informed campaigns by the FDA, WHO, and RIVM — yet its foundational empirical study has never been fully replicated. We are changing that.

26 Participating Labs
4,000+ Participants
14 Countries
NWO Funded
Founding Team

The People Behind REP-COM

Five communication scientists whose careers are built around rigorous, open, and replicable science.

Anita Eerland
Anita Eerland Radboud University
Lisa Vandeberg
Lisa Vandeberg Radboud University
Marieke Fransen
Marieke Fransen Radboud University
Philipp K. Masur
Philipp K. Masur VU Amsterdam
Ivar Vermeulen
Ivar Vermeulen VU Amsterdam
Meet the Team →