A correlational research design investigates relationships between two variables (or more) without the researcher controlling or manipulating any of them. It's a non-experimental type of quantitative research.

Can a correlational study be qualitative?

There are two methods in which data is collected in a correlational study: ... The data collected in naturalistic observation can be qualitative or quantitative. Archival data: Archival data is another way to collect data for correlational research.

Is correlational design quantitative?

It is a misconception that a correlational study involves two quantitative variables. However, the reality is two variables are measured, but neither is changed. This is true independent of whether the variables are quantitative or categorical.