If someone keeps loudly singing the same line over and over again, it could be a symptom of a psychological disorder known as "echolalia." Echolalia is a behavior where an individual involuntarily and persistently repeats words or phrases spoken by others or themselves. It is most commonly associated with conditions on the autism spectrum, especially in children with autism.
Echolalia can manifest in different forms, such as immediate echolalia (repeating words or phrases immediately after hearing them) or delayed echolalia (repeating words or phrases after a significant time delay). It is important to note that echolalia can also be observed in individuals with other neurological or developmental disorders.
The repeated singing of the same line over and over again might be a variation of echolalia, especially if it is persistent, disruptive, and beyond what is considered typical behavior for the person's age or developmental stage. If you or someone you know is experiencing this kind of behavior, it is essential to seek professional evaluation and guidance from a qualified healthcare provider or a specialist in neurodevelopmental disorders. They can assess the individual's symptoms, provide an accurate diagnosis, and develop an appropriate treatment plan if needed.