(Q013) On a regular basis, Minerva says that she can actually feel bugs crawling beneath her skin. She is certain that she feels the bugs, and intensely scratches the skin on her arm to get the bugs out. However, the reality is that there are no bugs under Minerva's skin at all. It is most likely that Minerva, who has been diagnosed with schizophrenia, was experiencing , a symptom of schizophrenia.

a hallucination                                                                        

Explanation:

Hallucination: In abnormal psychology, the term "hallucination" is described as a phenomenon which is associated with the perception that occurs in the absence of any external stimulus and consists of qualities that is associated with real perception. Hallucination is considered substantial, vivid, and is considered to be located in the "external objective space".

In the question above, the given statement represents hallucination.