1.4 Terminology

Explain the fundamental differences between the following pairs of often-confused terms (Table 1.1), highlighting the important differences.

TABLE 1.1: Distinguish the similar terms
Hypothesis	$\blacktriangleleft$ Pair 1 $\blacktriangleright$	Research question
Relational RQ	$\blacktriangleleft$ Pair 2 $\blacktriangleright$	Repeated-measures RQ
Response variable	$\blacktriangleleft$ Pair 3 $\blacktriangleright$	Explanatory variable
Response variable	$\blacktriangleleft$ Pair 4 $\blacktriangleright$	Outcome
Observational study	$\blacktriangleleft$ Pair 5 $\blacktriangleright$	Experimental study
Quasi-experiment	$\blacktriangleleft$ Pair 6 $\blacktriangleright$	True experiment
Conceptual definition	$\blacktriangleleft$ Pair 7 $\blacktriangleright$	Operational definition
Unit of observation	$\blacktriangleleft$ Pair 8 $\blacktriangleright$	Unit of analysis