People have always wanted to communicate with the dead. We miss the company and the relationships we had with them when they were alive. We want to know that they're okay wherever they are; that they are happy and no longer burdened by the trials of earthly life.
Yes, we can reach out to those who have passed, but can they talk back? We have developed various methods and rituals in hopes of making two-way contact - most recently, several technology-based methods. But are they effective? We seem to be getting responses... but can they be trusted? Are they truly responses from the dead?
Here's a review of the most common methods could be channels through which the dead communicate. Read more.