Students frequently learn the Big Five personality model by using the acronym OCEAN, where each letter of the word corresponds to the first letter of one of the factors (openness, conscientiousness, extraversion, agreeableness, neuroticism). These students are using:

These students are using: chunking

Explanation:

Chunking is a learning/teaching technique in which a large piece of information is separated in smaller groups or chunks so that it can be more easily memorized. The benefit of this technique is to overcome memory limits.

In the current example, students are more likely to memorize the Big Five if they compress the factors into one key word