ALT Abstract The replication crisis revealed high levels of bias and questionable research practices (QRPs) in psychology research. Registered Reports (RRs) have been increasingly adopted as a possible solution, but there has been relatively little evidence of whether this novel publishing format appears to be working as intended to reduce bias and QRPs. This project sought to build a detailed database of RRs and closely matched standard reports (SRs), to investigate whether RRs perform better than SRs on indicators of quality, rigour, and transparency.