Which type of study will a researcher prefer to estimate the degree of relationship between the level of education and achievement motivation?

To estimate the degree of relationship between two variables a correlational study is preferred.

A naturalistic study observes behaviour in natural settings without gauging relationship strength.

An inventory study catalogues characteristics or items rather than measuring association.

An experimental study establishes causation, going beyond mere degree of relationship.

Correlational design yields a coefficient expressing direction and strength of the link.

Correlation, however, does not by itself establish a causal connection.