Be a Cochrane Citizen Scientist and contribute to health evidence

Join Cochrane Crowd and contribute to health evidence

Globally many are in isolation or are practicing physically distancing. Cochrane invites anyone who is interested in healthcare evidence to become a virtual citizen scientist! Anyone can join and no previous experience is necessary. We also have special COVID-19 weekly challenges you can join.

Cochrane Crowd is a global community of volunteers who are helping to classify the research needed to support informed decision-making about health care. Everyone is welcome to join!

The job of the Cochrane Crowd community is to review descriptions of research studies to identify and classify randomized controlled trials (RCTs), a type of study that is considered the gold standard for clinical trials. Reports of RCTs are then fed into Cochrane’s Central Register of Controlled Trials, helping Cochrane authors and other systematic reviewers around the world quickly find the evidence they need to determine whether a treatment works, or whether a diagnostic test is accurate.

Anyone can join Cochrane Crowd and no previous experience is necessary. Members find the experience helps build skills in evidence assessment, and by focusing their effort to a health topic of interest they can keep abreast of the latest research. Brief (and fun!) online training is provided, and any contribution is welcome, whether it be five minutes here and there or more focused periods of time.

Why Join us?

Want to get involved? Watch the tour of the platform below and then head over to Cochrane Crowd to sign up and start screening! And don’t forget to tell your colleagues, friends, and families – the more the merrier!

Physically apart but working together as part of Cochrane Crowd - join us for a COVID-19 screening challenge! Every week thousands of new articles about COVID-19 are published and hundreds of new trials are registered. This makes it a real challenge for researchers and clinicians to keep up. We want to help by identifying new COVID-19 studies and then tagging those studies by the type of study they are and by the aims of the study (for example treatment, or diagnosis). The task went live in October 2020 and already the community has amassed over 20,000 classifications, helping to assess over 5,500 records. Watch the webinar below for an introduction to  COVID Quest! 


Join us for these weekly challenges - just log into Cochrane Crowd to participate!

Cochrane Challenge Dates

If you have any questions please don't hesitate to get in touch at

visit Cochrane Crowd

Monday, November 16, 2020