In rTMS therapy, a device called a "magnetic stimulator" provides electrical energy to a magnetic coil that delivers a magnetic field. When the coil is placed against the surface of the head, the magnetic field can cause parts of the brain to either increase or decrease in activity, depending on how quickly the magnetic pulses are delivered. This study is designed to test whether high-frequency rTMS delivered to an area near the front of the head, called the dorsolateral prefrontal cortex, can improve the "negative symptoms" of schizophrenia, which include decreased thinking, difficulty motivating, and social withdrawal.