The purpose of this research study is to understand how individuals with Multiple Sclerosis (MS) learn from the outcomes of their actions during a common social situation.

The purpose of this research is to study whether completing thinking exercises on a computer combined with physical exercise is an effective treatment for difficulties with thinking, memory, and problem-solving in individuals with Progressive Multiple Sclerosis (PMS).

The purpose of this study is to investigate how individuals with MS make decisions regarding their MS medications and treatment.

The purpose of this research study is to compare the effect of two different types of physical activity on thinking skills in individuals with Multiple Sclerosis (MS).

The purpose of this research study is to detect any accumulation of iron in certain regions of the brain using MRI and use this imaging data to examine the relationship between iron deposition and the severity of cognitive fatigue in MS.

This study examines how feedback (assessments of task performance) affects learning. Participants will take tests of thinking skills and complete thinking tests in an fMRI scanner.

The purpose of this study is to create a new virtual reality based (VR) method of measuring how well individuals with MS recognize emotions in other people. The study will also examine how useful and effective this new VR method is as a measurement tool. 

The purpose of this study is to examine the effectiveness of an emotional processing training program in people with MS. 

The purpose of this study is to examine the relationship between eye movements and the speed someone is able to process information.