Bring the theories of learning to life using 'Sniffy - The Virtual Rat', a realistic digital rat in an operant chamber (Skinner Box), for his ability to give students hands-on experience in setting up and conducting experiments that demonstrate the phenomena of classical and operant conditioning. Users begin by training Sniffy to press a bar to obtain food. Then, they progress to more studies of more complex learning phenomena. Throughout each, a series of 'Mind Windows' enables students to visualize how Sniffy's experiences in the chamber produce the psychological changes that their textbooks discuss in connection with learning. Available on a cross-platform CD-ROM, the Pro version of Sniffy includes 40 exercises that cover every major phenomena typically covered in a Psychology of Learning course. The CD-ROM comes with a Lab Manual that walks users through the steps necessary to set up classical and operant conditioning experiments that closely resemble the experiments discussed in learning texts. (Screen shots are included for both Macintosh and Windows users.) The manual also includes instructions on how to print or e-mail results, so that Sniffy can become part of students' homework assignments and term papers.