Question

which of the following is similar to \case study is to longitudinal study\?
naturalistic observation is to correlation coefficient
experimental research is to experimental group
survey is to double blind study

Explanation:

First, identify the relationship: A case study and a longitudinal study are both distinct types of research designs (they are parallel categories of research methods). Now analyze each option:

1. Naturalistic observation is a research method; correlation coefficient is a statistical measure (not a parallel research method).
2. Experimental research is a research design; an experimental group is a component within experimental research (not a parallel design).
3. A survey and a double-blind study are both distinct types of research designs (parallel categories of research methods), matching the original relationship.

Answer:

survey is to double blind study