preprintposted on 17.11.2020, 16:15 authored by Wilhelmina van Dijk, Christopher SchatschneiderChristopher Schatschneider
For some research questions, it is better to have large sample sizes. Instead of going out to collect these samples, researchers can combine data from existing studies. There are two main ways to combine existing data: through meta-analysis of summary statistics, and through Integrative Data Analysis using individual participant data.
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