Question: You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product? Review title: Not a nuclear physicist! Product review: I'm just an engineering student, so what do I know? Well, I will tell you this much: there are a lot of errors in this book. Someone else wrote a review that said these errors are a good way to learn. This person was also a practicing physicist! I'm still learning and I don't leave much room for interpretation when something is incorrect. I automatically assume I'm wrong because I'm still learning. This is overkill, but there are a LOT of errors so don't throw caution to the wind. This book also explicitly states that you should understand some "obvious" things. If I did, I'd stick with my textbook! Not completely useless, but can be frustrating.
Answer: decrease

Question: You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product? Review title: BEAUTIFUL GLASSES Product review: The glasses are beautiful but 2 arrived broken. The company has shipped replacements but I have yet to receive them.
Answer: increase

Question: You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product? Review title: This CD is fantastic--- very Russian in tone and intonation. Product review: I first heard this music while taking a class on the introduction to classical music, and have looked forward since then to buying it myself.
Answer: