Which of the following is NOT a mnemonic technique?

The correct answer is interference theory because it is not a mnemonic technique; rather, it is a concept related to memory that deals with how existing memories can hinder the retrieval of new memories or the recall of previously learned information.

In contrast, the method of loci is a well-known mnemonic device that involves associating items to be remembered with specific locations, thereby creating a mental map for easier recall. Acrostics are mnemonic aids that use the first letter of each word to form a memorable phrase or sentence, which can help in recalling a list of terms or concepts. Similarly, the keywords technique involves associating new vocabulary words with familiar words to create a mental link that enhances memory retention.

Interference theory, however, does not function as a method for enhancing memory retention but rather as an explanation of a common obstacle in memory processes, making it distinct from the other options listed.