The Introductory Psychology CLEP used to be considered one of the easier exams, but it's been expanded greatly over the years. If you’ve taken a Psychology class in high school, you’re already ahead of the curve, but you'll need to have taken a Biology or Human Anatomy class as well. It's more of an Introductory Psychiatry test rather than just a Psychology test. You’ll need to spend some time learning and reviewing the key material. Make sure you're familiar with major theories, key figures in psychology, and the field's vocabulary. Names like Freud, Pavlov, Piaget, and Skinner will definitely come up, so it’s a good idea to know what each contributed to the discipline. The exam also includes questions about biology—how the brain works, the roles of neurons, how impulses travel, the functions of different brain regions, and how our senses process information. My latest experience with this test was heavy on these subjects, and I'd recommend some solid review before attempting it. In summary, this CLEP is difficult, but manageable with some preparation. The good news is that this will prepare you well for several other exams, including parts of the Biology CLEP and other Psychology exams. Put in some study time, get comfortable with the key terms and concepts, and you’ll be well on your way to earning college credit.