According to Wikipedia, hyperfocus is defined as "an intense form of mental concentration or visualization that focuses consciousness on a narrow subject, separate from objective reality and onto subjective mental planes, daydreams, concepts, fiction, the imagination, and other objects of the mind." It may be evidence of a condition known as "perseveration," which is "the inability to, or impairment in, switching tasks or activities ("set shifting"),or desisting from mental or physical response repetition (gestures, words, thoughts) despite absence or cessation of a stimulus."
I've noticed many of these qualities in myself. I tend to become so completely immersed in one particular activity or state of mind that I lose awareness of everything going on around me, and I find it very difficult to switch focus and begin a new task. I also find it impossible to multitask- if I'm talking on my phone while walking a very familiar route, there have been times when I will totally lose track of where I am and go in the complete wrong direction because I am so involved in the conversation.
The worst part is, I'm a huge procrastinator. Once I start procrastinating, I feel like I get stuck in a cycle and there is no hope of getting out of it. It's like I become addicted to procrastinating! At the same time, I have equal potential to get "addicted" to positive behaviors, so I do end up accomplishing a lot once I'm finally able to switch directions and make the decision to apply myself.
Can other INFJ's relate?