Here I put together a serious of articles from my readings and personal experience having to do with the psychology of the game and tells. Each article is a simplified version of whats available in the three main books on the subject. I strongly suggest if you want to be a successful live player pick up the following books.

Table Psychonogy | Impulsive/Reactive Tells | Acting & Situational Tells | Sample of Specific Tells

Also take a look at my video section for table psychology, body language, and tells videos I posted

Psychology and Game Theory
Caro's Book of Poker Tells	Caro's Book of Poker Tells (Mike Caro): Excellent book on reading players. A must read if you play live. The book will pay for itself in one session.
Read Em' and Reap	Read 'Em and Reap: A Career FBI Agent's Guide to Decoding Poker Tells (Phil Hellmuth): Excellent compliment to Mike Caro's Book of Tells. Phil studies the subconscious part of the brain and signs to look for.
Inside the Poker Mind	Inside the Poker Mind (John Feeney Ph.D): Essays about psychology, play, players, how they think, and how you should think. This book goes well with Mike Caro's Book of Tells. Many good suggestions and guides to help you with the non-technical part of handling poker.
Elements of Poker	Elements of Poker (Tommy Angelo): This book tackles mental discipline and "right thinking" for playing poker and for life. I think it is a necessary ingredient to any poker player's arsenal of mental tools for the game. I highly recommend it.