post hoc test

I have data from an ecological experiment featuring a partially crossed design. The experiment manipulated air temperature (3 levels: T1, T2, T3) and precipitation (2 levels: W1, W2). However, the T2-W2 treatment combination was not performed. We have a number of response variables (e.g. plant...

Hi, I have conducted both ANOVA along with Post Hoc Test on SPSS. However, I have encountered a problem on the Post Hoc Tests. In particular, between the multiple comparisons and homogeneous subsets sections. My problem is under the multiple comparisons - the category 7 is not statically...

Dear All, Please help me with my statistics... I am using 5 different dimensions to interpret the correlation among them. For instance, Burnout is negatively related to engagement. All dimensions have at least 3 Lickert scale data. Now, I would interpret the analysis among them, trying with...

I believe this question should be relatively simple. I have a 2x2 repeat measures anova for a performance task. My two factors are presence and absence of an observer and presence and absence of music playing in the background, therefore my 4 conditions are (1)no observer-no music...

Hello everyone! I have performed a Fisher's exact test (5X3 tables) and I have found statistically significant differences in my groups. How can I find out in which groups significant differences were found? Is there any post hoc test I can perform? Thank you deeply in advance!

Hello, What are the criteria for computing the pairwise or the stepwise step-down comparison in SPSS after Kruskal-Wallis? I know that the pairwise comparison is more conservative than the stepwise comparison, but are there any other criteria to decide which post-hoc test to use? Does anybody...

I am trying to figure out a chi square problem, and I keep getting stuck. The problem reads: A researcher tested single mosquitoes from five different locations for the presence of a particular virus and obtained the following data: Location A B C D E w/ virus 3 7...

Hi, I am doing ANOVA using three fixed independent factors of which one is sex (two levels 'male' and 'female'), temperature (three levels: 1,2,3) and quality (two levels: good and bad) and I want to see the effect of these factors on dependent variable factors like life-span, weight and...

Dear posters, I am currently trying to interpret results from three different groups in my study. There is essentially a control group and two picture groups. My original hypothesis would be that one of the picture groups would outperform the other, but post hoc testing revealed something...

Hi all, I'm new to trend analysis and would like to get some advice. My study is about treatment intervention on learning. Between-subject variable is treatment group (treatment1, treatment2, no treatment) and within-subject variable is time (time1, time2, time3). My dependent variable is...

Hi, So I have just conducted my Two-Way ANOVA using my undergrad thesis data, and my Levene's Test came back with a significant result. According to my lecturer's notes, I'm to conduct a Tamhane's T2 as a Post Hoc, however I am not allowed to select this function in the Post Hoc tab (or any of...

Hi! I have precipitation data ~20 years. For each year, I have the total precipitation for a given month for that specific year. I am trying to find if there there is a statistically significant difference between the years in the total precipitation. I have organized my data such that each...

I have two factors: Brainregion (4 levels) and Group (5 levels). Glutamate is my dependent variable. (data attached in data file) Brainregion Group Glutamate CC Control 11.37339396 CB Control 11.18106494 HC Control 11.45533601 PM Control 10.62418165 CC Alcohol 10.4039496 CB Alcohol 9.882992035...

I need to be able to calculate long hand some Planned Comparison test for a Within-Groups ANOVA framework. I understand the most common tests in such a situation are "Contrasts" test including: Simple Contrasts, Repeated Contrasts, Deviation Contrasts, among other Contrasts test I assume that...

Hi all, Can anyone help me trying to understand how to do the grouping at the end of the post-hoc procedure in the one way ANOVA? For each kind of test (LSD, Bonferroni, Tukey, Scheffé etc) I can understand the way it calculates the confidence interval and how it check if the means of each...

Dear all, My data consists of 8000 rows and 14 columns, as follows: The rows correspond to quadruplicate measurements of 2000 variables and columns represent different non time-related conditions. I want to identify variables with statistically significant size difference in any pairwise...

Hello - I am a phd student in psychology and I would be very grateful for some advice about contrasts. I have conducted a naming experiment for which response time was the outcome measure. There were 2 groups (treatment v control) and 3 testing conditions (A, B and C). I ran a mixed 2 x 3...

Hi, I am doing a repeated measures with a covariant. a 3-way interaction (gender-group-memory) emerged as significant. I understand that when doing a repeated measure with a covariant the "post hoc" option for SPSS is not applicable. I selected "compare means" in the option window, but I...

I was attempting a post hoc test after running a manova in spss and it would not run because "one group has fewer than two cases". Before I go further, let me make it clear that this is incorrect. In the Between-Subjects Factors table, my values are listed as follows: Identity: 1...

Dear Community! I have two questions regarding the GLM-ANOVA and post hoc tests! 1 ) Is the GLM-ANOVA an appropriate choice of statistical analysis in my study? 2 ) Post hoc test: Fischer´s LSD vs. Bonferroni Study design: I have 4 groups of patients with different diagnosis in which...