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    Is count data for parametric analysis or non-parametric analysis?

    Hi, In our paradigm, animals are presented with an stimulus and we count the number of calls they make. I believe the number of calls is discrete variable and count data. When we do an anlayis on these data, do we do parametric analysis or non-parametric analysis? For example, we...
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    Principal Component Analysis: What determines sign of variable loading?

    Hi, I have a question about how the signs of variable loadings on a component (factor) are determined in the PCA. I am studying anxiety/fear response in animals. I tested a group of animals by showing a negative stimulus and measuring their behavioural responses to the stimulus. The...
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    Cluster analysis in SPSS

    Hi, I have 2 questions about conducting a cluster analysis in SPSS. 25 animals were tested by being presented with 2 different stimuli. They make 3 types of calls but the number of each type of call differ by the type of stimuli presented. For instance, for call1, call2 and call3...
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    Box's test in MANOVA

    Hi, I have run MANOVA with 3 groups in the independent variables and 8 variables for the dependent variables. I have 4, 5, 5 subjects in each group respectively. In the output, I get this message. Box's Test of Equality of Covariance Matrices is not computed because there are fewer than...
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    Independence of observation in 2-way ANOVA

    Hi, I'm a grad student in behavioural neuroscience. I am looking at individual difference in anxiety in animals. There are two groups of animals: one anxious and the other non-anxious. I present then with a potential threat and see if their anxiety levels are reflected on their...