Confirmation bias
Pornography has many different forms which are difficult to cover in blanket form. Pornographic internet videos, for example, have been found to have different effects on viewers than material such as pornographic magazines. Within the field of pornography research, there are also other challenges that arise due to strong opinions and feelings on the topic. Confirmation bias has been prevalent on both sides due to societal taboos surrounding pornography. Studies have looked into both negative effects of pornography as well as potential benefits or positive effects of pornography. A large percentage of studies suffer from methodological issues. In one meta-study by researchers at Middlesex University in England, over 40,000 papers and articles were submitted to the team for review: 276 or 0.69% were suitable for consideration due to the low quality of research within the field.