Multiverse analysis is a scientific method that specifies and then runs a set of plausible alternative models or statistical tests for a single hypothesis.
It is a method arising in response to the credibility and replication crisis taking place in science, because it can diagnose the fragility or robustness of a study's findings.
Multiverse analysis most often produces a large number of results that tend to go in all directions.
Evidence against single studies or statistical models, is useful in identifying potential false positive results.
They could show that their findings supported previous research of birth order on intellect, but provided evidence against an effect on life satisfaction and various personality traits.