2) Participants Are Given a Perceptual Task to Perform

2) Participants are given a perceptual task to perform. Based on their scores on this task, they are divided into three groups: strong visualisers, moderate visualisers and weak visualisers. They are then given a memory task to complete in which they have to use concrete imagery in order to retain and recall a list of items. As predicted, strong visualisers are found to recall most items in the memory task.
This is an example of:

A) A true experiment
B) A quasi-experiment
C) A natural experiment
D) A non-experiment