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Hi there, I have 24 variables that I am currently running spearman's rank order correlations on in SPSS 19. I have read up a bit on familywise error and false discovery rate (e.g. http://www.unt.edu/rss/class/mike/5030/articles/falsediscovery2.pdf) but still do not have a clear idea on how...

Hi there, I am preparing my first article for journal publication and am having difficulty exporting/saving my charts in a way that makes them presentable. I've tried a few different formats (.emf, .eps, .jpg), and also saving to pdf and changing the resolution in GIMP. The main issue is that...

Hi there, I am trying to create a chart showing the results for a feedback questionnaire, preferably using a box plot, but also want to experiment with a simple dot plot or bar graph. I have responses form eight participants. There were 10 questions and each required the participant to a give a...

Hi there, I am calculating Difficulty with Rank-biserial correlation coefficients in a spreadsheet using the following formula: rb = (2/n)*(Y1 - Y0) where Yo and Y1 are the means on Y of those scoring 0 and 1 on the dichotomy, respectively. This was sourced from Glass (1966) - Note on Rank...

Hi there, I have tow questions regarding these analyses that I am yet to find an answer for. 1) Rank-biserial Is it possible to run this in SPSS? I have not found this option within the program and cannot find relevant advice on any forums. I am looking for relationships between sets of...

Hi there, I am running a small study in which both treatment (n = 7) and control groups (n= 6) have undertaken the same 48 item rating scale task (scale = 1 - 10) pre- and post-treatment period. We are running an independent t test to see whether the mean difference score (post test score -...

Minimum sample size for calculation of Guttmans lower bounds? Hi there, I am in the process of assessing the internal consistency of two tests, test A & B. Both tests are measuring the same thing so I am also conducting a split half reliability analysis. All participants have taken both...

Hoping somebody can help with this? Recently we conducted a small study with ten participants. Each participant completed the same two tests, 'Test A' and 'Test B', during one session. Five particpants (Group AB) performed test A first, while the remainder performed test B first (Group BA)...

Hi there, I am completely stumped on which tests to use for a study that I am working on. Basically, I have two groups, 1 & 2. The two groups are of different size and the samples are small (9 & 12). Participants in both groups have performed the same three tests, A, B & C in the one...