Dissociative disorders are illnesses involving any disruption of memory, awareness,perception and consciousness. There are types of Dissociative disorders namely the Dissociative identity disorder, Depersonalization disorder and the Dissociative amnesia.In the situation, Lebron has experience the dissociative amnesia. This has been linked to stress caused by a traumatic event such as accidents and disasters or may have suffered or witness a trauma. Supportive treatment though if it would be a short time memory loss would be enough for a patient to recover with this disorder.
There are many human relations skills which can help you to more willingly take on a challenging subject. Greater self-confidence is one of those for example.
Being more self-confident enables you to trust more in yourself and therefore to also think you can succeed better with more challenging topics in comparion to the scenario where you don't really think highly about yourself.