What does psychic mean?

That cartoon is a lie. Three-dimensional space is matter, including particles and waves. The spread of information is the spread of particles and waves. Particles themselves cannot move freely, so they need to travel through waves. The same waves can communicate, just like TV or radio, so the usual "haunted" phenomenon has similar props.

The space we are in now is a three-dimensional space, and ghosts or other immaterial things belong to a multi-dimensional space. Spiritual communication means that particles in three-dimensional space communicate with waves and particle waves in multi-dimensional space at the same frequency, thus realizing a kind of immaterial communication.

This kind of channeling is theoretically established, but few people can do it.