In the context of transfer of learning, when learning in one area neither helps nor hinders learning in another area, what is this type of transfer called, and to which aspect of the body does 'bilateral transfer' relate?

When prior knowledge or experience has no effect (neither positive nor negative) on learning new knowledge, it is called zero transfer. On the other hand, bilateral transfer refers to the effect of a skill learned by one limb of the body on the other symmetrical limb, such as being able to write to some extent with the left hand after learning the skill with the right hand.