Low. While some scientists may reasonably postulate the existence of parallel worlds within a grand multiverse, they do not believe that travel between them is possible. With little real-world science applicable to the existence and travel between parallel worlds, this sub-genre has weak scientific explanations, like wormholes and hyperspace.

High. Unless the story is a comedy or a pulp, chances are the level of grand ideas is high. Parallel Worlds stories have been used for social commentary and historical speculation since its inception.

Moderate. Characterization is a large component of world-building for Parallel Worlds Sci Fi. Characters are how readers are transported and connected to these fictional parallel worlds so characters have to be three dimensional otherwise readers will not be invested and will not be able to follow the story. That being said, a Parallel Worlds/Pulp Sci Fi crossover is not likely to have original characters.

Moderate. In its more simplistic understanding, Parallel Worlds Sci Fi has two types of plots: someone from our world is transplanted to another world and goes on adventures, or a communication or visitor from another world has some kind of impact on our world.

ariable. There is lots of freedom for writers of the Parallel Worlds sub-genre--it is truly a genre of anything can happen. As such, violence can be graphic or nonexistent.