Jeff Dodick's comment is very true - you can't always just use a t- test. The nature of the variables play a role in determining what test is appropriate. This site can provide some insight: http://www.ats.ucla.edu/stat/spss/whatstat/ but it would be best to consult a stats expert. Cesar Delgado * Assistant Professor * Science and Mathematics Education * 1 University Station D5700 * University of Texas at Austin * Austin, TX 78712 * Phone: (512) 232 9682 On Jun 17, 2010, at 4:09 AM, Britta Bookhagen wrote: > Greetings everyone > > I was wondering whether someone could recommend one or two educational > papers, that use pre-and posts tests to assess students achievements > from a program taught (I actually have two post-tests, a long term and > a short term). > > I am about to write things up for a scientific paper and I am not sure > whether I should use repeated measurements or two series of t-tests to > analyze the quantitative questions. Does anyone have experience with > this topic? There are just too many papers out there and I am not sure > about their reliability. > > I would very much appreciate any suggestions. > > Thank you very much > > Britta