Gilbert wanted to study only students who do very well in class because such students would best him test his theory. he asked 20 professors for the names of high achieving students and he then interviewed them. which sampling design does this example reflect?

Purposive sampling

Explanation:

A purposive sampling :

A selection of the participants is done by looking at their characteristics as the overall group or population and dependent on the purpose of the study.

When one needs to tackle a target question fast without the worrying factor of proportinality this is a good sampling method to be chosen.

It can be divided into heterogeneous purposive sample and homogeneous sample .

Heterogeneous tackles various issues which relate to a particular phenomenon. Many number of participants are questioned in order to receive a broader view of the issue in question.

Homogeneous

A homogeneous purposive sample deals with participants that have similar characteristics. The above purposive sample can be said to be a homogeneous one because the professor has an interest on the students who are all high achievers and that is their similar characteristic.