'Mental telepathy' can be a broad term that encompasses numerous things. It typically means reading the thoughts between people without using normal senses. There is a huge difference however between having an intuitive gut feeling and knowing information that could only be gathered by reading somebody's mind. Both basic and complex skills can be construed as mental telepathy. The different levels of mental telepathy are summarized in this article.

NON-VERBAL COMMUNICATION

Whenever two people communicate without speaking, using body language or facial expressions instead, it is considered non-verbal communication or kinesics. Some people are able to communicate simple messages while others are able to communicate entire conversations using kinesics. You may have experienced this when giving looks to a cohort in a secret plan of action. Achieved easiest and most accurately between people who know each other well, kinesics involves knowing what the other person is thinking by non-verbal gestures or kinesics.

This may not count as mental telepathy, as the two people are using their senses to communicate, just not verbally and this is correct. However, mental telepathy plays a role, because their minds are more attuned to each other because of extended exposure to the way the others mind may think and some predictability comes into play, so there is a sort of mental connection. Two people that know each other well enough to understand more subtle body language, or have created nonverbal signals to communicate, might be argued that it is not be classified as mental telepathy.

EMPATHY

Empathy is the ability to recognize, perceive, or directly experience the emotions of others. Some people are very poor at this, and others are very good at this, being able to mentally 'put themselves in another's shoes' and understand how they must be feeling. Empathy can be increased with training and practice. Actors, for example, are able to imitate the emotions of others, even to the point of being able to make themselves spontaneously laugh or cry.

'Sympathetic pain'"feeling another person's pain as if it were your own is something expectant fathers mention, some claiming they can feel the mother's labor pains at the same time she is experiencing them. If someone close to you is experiencing an overwhelming emotion, you may feel an echo of the same emotion inside you, and mothers often describe this uneasy feeling when their child has been injured. The phenomena of long distance empathy, where a person suddenly feels that someone close to them is in danger, even though they are not near the person at the time is common in other relationships, as well.

Psychologists write off such empathetic phenomena as a simple trick of an overactive imagination. At the very least, they do have a point that other senses are being used. Would we be able to feel the sympathetic pain of a broken arm, for example, if we could not actually see the injury? This does not explain, however, the phenomena of long-distance empathy.

CONCRETE CONCEPTS

There is another kind of telepathy which involves sending and receiving concrete symbols and objects between two people. Here advanced mental telepathy is involved and it is a phenomena outside the five senses. This kind of mental telepathy involves a lot of training, concentration and practice. There is a receiver and a sender involved in this.

The simpler the concept, the easier it is to communicate through thought alone. For example, a color or shape may be easier to convey than an animal.

This level involves a lot of trials in telepathy. In these experiments Zener cards are used. These cards have simple symbols engraved on them like black and white patterns, squares, circles, waves etc. There are many cynics and doubters who may say that since there are merely five cards involved, there is a probability of a guess being right at least 20% of the time. However, on the other end, people feel that having known symbols can enhance the thought coordination between the sender and the receiver thus enhancing their telepathic technique. Moreover even if we assume that random guesses may succeed 20% of them time, there is no explanation of success rate of 50% or more.

ABSTRACT COMMUNICATION:

This level of mental telepathy involves more advanced abstract concepts than shapes and colors. Here people communicate ideas, values and actions, which is quite tough the success rate is quite low. Telepaths seldom achieve this level and the ones who do are pretty rare.

Some animals appear to communicate, and science is not able to explain how. Telepathy shouldn't be ruled out. At this level, such animals would be using abstract concepts, albeit very basic concepts. Due to the nature of animal brains lacking prefrontal lobes, such ideas would probably not go beyond simplistic impulses like 'hungry', 'thirsty', 'horny', or 'danger!'

While humans may have once been capable of telepathy, as the species evolved and developed language, it was no longer needed as a form of communication. With the right stimulation humans may be able to call upon this dormant ability that includes abstract communication of ideas. Mental telepathy could be used to communicate, without the need for the use of the five senses.

If enough people can develop these powers, theoretically all humans in the future could use mental telepathy to communicate, according to some scientific beliefs.