PR2 Exercise 1

True experimental and (a)   research are the two types of experimental research.

(a)   selection of subjects happens in true experimental research;

(a)   selection occurs in a quasi-experimental research.

If the study happens in a place surrounded by walls, it is a (a)   research,

but if it is outside, it is a (a)   research.

Actually, the only thing that makes the two types differ from each other is the (a)   of selecting the subjects.

If the selection is randomized, it is definitely a research.

(a)  

Data collected by the researcher himself is called (a)  

Phone, e-mail, questionnaire are some of the data gathering (a)   .

Secret identity of the subject is essential for the purpose of (a)   .