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: refund, please! Product review: Oh, boy - this thing is such a dud. I got it installed, managed to copy one piece of video (after several software crashes and restarts), only to discover that it had screwed up my Real Player and Windows Media Player, so now all my other video files wouldn't play! No solution on their site, didn't have the patience to deal with calling tech support, so I did a system restore, packed it back up in the box and it's going right back. What a waste of time and money! It's not even heavy enough to use as a doorstop.
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: Thorough Product review: This book was very well-researched, and although it seems to lack information in some areas (such as information about Mikhail Vasilyevich Lomonosov), it provides a great deal more in others. I referenced this book many times in my research paper, and found this author to be very knowledgeable about this topic (he has other scholarly journals as well). Easy to read and learn a lot from!
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 is a best seller??????? Product review: I needed and interesing book for a long flight. I Chose "Area 7" as it sounded like my kind of novel.I could not finish it. It is so far fetched and lacking in plot that I will not read Mr Reilly's efforts again. Don't waste your money either.
Answer: