What is the source of most quantitative data?

What are the two important questions in respect to measurement?

What are the sources of quantitative data?

Measurement captures use variables to describe something. What are the two "classes" of variables that are important here?

What are the variables distinguished by perceivability?

What are the variables distinguished by outcome of operationalisation?

What values can the variables of operationalisation have?

How do we call data that was gathered across the sample but at only one point in time?

How do we call data that was gathered repeatedly over time through the same observations?

What elements should a survey incorporate?

What are the steps you have to follow when planning a survey?

Surveys are so called "self-reported variables". Two more self-reported variables would be...

Gathering primary data it is imortant coming from conceptional to operational definitions. What does that mean?

What is a scale?

What does the Kirton-Adaption-Index measure?

How to test the reliability of my measurement?

How can we increase validity of our measurements?

What are things to watch out for when using secondary data?