Reconstructive memory refers to the way memories are pieced together from bits of information. Memories are not perfectly formed, and they depend on outside influences to develop the whole picture. These influences can be anything, such as a person's own expectations or suggestions from other people.
People want to believe that memories are perfect and not able to be molded by information outside of the memory. However, in memory recall, there are blind spots. The brain fills in those gaps, and that is reconstructive memory. When recollecting a memory, a person will remember pieces of it and, in order to form a whole memory, they add to it, or reconstruct it.