Moore (2016). Pre-register if you want to.” - Article summary

Selective reporting refers to not publishing and reporting all research results and this is a problem for psychological research. Many scientists do not preregister their studies because they fear it would constrain their creativity (1), it brings added scrutiny to their research reporting (2) and it is another requirement in a field which already has a lot of requirements (3).

Preregistering makes testing a theory more difficult because sometimes scientists think of the best way to test a theory after data collection. However, exploratory studies can be used for this. Preregistering is not as laborious as researchers might think.

Preregistering clarifies the distinction between confirmatory and exploratory tests. Conducting more tests and reporting fewer inflates the type-I error rate. Preregistration helps to obtain the truth. Preregistration contributes to the confidence in a published result. It makes p-values useful for their intended purposes. The risk of a false positive is higher than the reported p-value without preregistration but it is difficult to tell how much higher.

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