This dissertation is composed of projects on three aspects of gathering and learning from data in the social sciences: drawing representative samples, taking valid measurement, and making warranted inductive inferences. Chapter one studies the challenge of drawing representative human samples. It is well documented that most samples used by…

Apart from providing a bird's eye view of a given domain of inquiry (Ioannidis et al., 2015), systematic reviews such as methodological syntheses offer a magnifying glass on prevalent existing problems in primary research and furnish empirically grounded solutions to rectify these issues (Page et al., 2021). As survey research in second language…