Hallucinations are when you hear the voices of sounds in your head. The voices are normally those of people you know. The voices often come in different forms ranging from positive and negative. The person often responds to the voices and this becomes a conversation but it is really just a dialogue made by one person with nobody retorting. The conversation is of great importance to the diagnosed and the individual sees nothing wrong with speaking to the voices in her head.
Although the illusions may occur when in a group of people, the deceptions happen quite often when the individual is alone. The individual is not aware that all the sounds he hears are in his mind. Hence he sees nothing wrong with exchanging conversations with those he hears in his head. The person may even respond in an aggressive manner as though he is arguing with the people in his head.