How the pandemic affected psychological research

In the wake of the COVID-19 pandemic, many journals swiftly changed their editorial policies and peer-review processes to accelerate the provision of knowledge about COVID-related issues to a wide audience. These changes may have favoured speed at the cost of accuracy and methodological rigour. In this study, we compare 100 COVID-related articles published in four major psychological journals between 2020 and 2022 with 100 non-COVID articles from the same journal issues and 100 pre-COVID articles published between 2017 and 2019. Articles were coded with regard to design features, sampling and recruitment features, and openness and transparency practices. Even though COVID research was, by and large, more 'observational' in nature and less experimentally controlled than non- or pre-COVID research, we found that COVID-related studies were more likely to use 'stronger' (i.e. more longitudinal and fewer cross-sectional) designs, larger samples, justify their sample sizes based on a priori power analysis, pre-register their hypotheses and analysis plans and make their data, materials and code openly available. Thus, COVID-related psychological research does not appear to be less rigorous in these regards than non-COVID research.