from Part I - From Idea to Reality: The Basics of Research
Published online by Cambridge University Press: 25 May 2023
This chapter discusses the key elements involved when building a study. Planning empirical studies presupposes a decision about whether the major goal of the study is confirmatory (i.e., tests of hypotheses) or exploratory in nature (i.e., development of hypotheses or estimation of effects). Focusing on confirmatory studies, we discuss problems involved in obtaining an appropriate sample, controlling internal and external validity when designing the study, and selecting statistical hypotheses that mirror the substantive hypotheses of interest. Building a study additionally involves decisions about the to-be-employed statistical test strategy, the sample size required by this strategy to render the study informative, and the most efficient way to achieve this so that study costs are minimized without compromising the validity of inferences. Finally, we point to the many advantages of study preregistration before data collection begins.
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