30:35

Formulating Research Questions [SUB: EN]

34:50

Qualitative Research Methods [SUB EN]

15:32

What is an Operational Definition? Measurements and Replicability

35:05

Observational Research (Blue)

8:24

What Are Research Constructs And Variables? Simple Explainer With Examples

22:03

Concepts, Operationalizations, & Measurement

1:09:51

In-depth Interviews

11:51

Classification of Variables and Types of Measurement Scales