I am encountering a data analysis problem and hope you could help me! I am doing a research about letting participants read three positive or negative articles about female politicians and measuring their IAT before and after reading articles. As I read posts before, the association score between the target and attribute is the expression.d score in the output data, so I compared the means of expression.d scores between the before and after experiment IAT test. The result shows that participants who read positive articles, expression.d changed from-0.25 to -0.12. Does it mean their attitude has been improved? Or it means nothing? Or I am on a wrong way to deal with the data?
Thank you very much for your help!