Questions tagged [statistics]
For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science.
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Combining Data from Multiple Participants for Statistical Analysis in a Facial Expression Memory Task
I am working on a project involving a memory task for facial expressions, consisting of two phases:
Encoding Phase: There are 8 trials in which participants view 8 different virtual characters, each ...
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Why did studies find a within-person correlation between IQ and agreeableness but not between-person?
Bartels, 2012 found a correlation of 0.21 in what I understand to be within-person correlations (when one trait increased throughout life, the other did as well), however the between-person ...
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Using Exploratory Factor Analysis for Items That Belong to Different Scales
I have a quick question about factor analysis from different scales. Is it advisable to use, conjunctly, items from various measures? For example, say that I want to evaluate factors that most ...
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Best practice for comparing data between completers and non-completers?
I conducted a study which collected data on a brief one-time intervention at 3 timepoints (pre, post, and one-week follow-up). There were some participants who dropped out between these 3 timepoints. ...
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Formulation of explorative research questions checking possible moderators
I conducted an experiment, where all participants were tested for verbosity under a low and under a moderate stress situation. My primary hypothesis was "Low stress situations, compared to ...
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Calculating Significantly Above Chance for 3-AFC Test
I am trying to figure out which participants who took a 18-item multiple choice test scored significantly above chance. Each item has 3 choices, so the probability of getting each question correct is ...
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Am I interpreting the odd ratio incorrectly, or is the graph wrong?
I'm running an independent factoral regression analysis with a cateogrical outcome variable (in R). It's a 2x2 design with two potential outcomes - essentially 'yes' or 'no'. I also have a continuous ...
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Is there actually a correlation between emotional trauma and homosexuality
One of the key talking points I hear to disparage homosexuality is that it stems from "a lack of a strong male figure" or some variation of that, putting aside the obvious irrelevancy of argument. I ...
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3x2 Mixed ANOVA, but 3 DVs, one of which is a yes/no - what statistical test?
I have a research design where I have a 3x2 mixed ANOVA, focussing on attitudes towards a drug. The between participants part has 3 levels, with 2 different methods of communicating about risks of ...
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How do I complete and report a Generalised Linear Mixed model from SPSS into APA?
I'm trying to learn how to do GLMM for my phd in psychology. I was intending to do a mixed model ANOVA, but the GLMM allows me to consider more variables simultaneously and so I have decided to go ...
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Methods for comparing extracellular neural response structure to auditory stimulus structure
I have two arrays, one representing an auditory stimulus and the other representing neural activity from auditory cortex. The auditory stimulus has known temporal and spectral structure. The neural ...
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How valid are comparisons of prevalence without control group, using different studies?
Let's say we have a subgroup S of the population (e.g. inmates), and we do a prevalence study for a certain condition D (e.g. major depression) in S for which we try to diagnose D somehow.
But we don'...
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How to get a psychology research assistant position?
I am a recent postgraduate student of social psychology and I have been trying to look for RA positions without much luck. My applications are getting rejected without any feedback and I am a little ...
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Equating between short form and long form of the same instrument
I have encountered several instruments in psychology and related fields where we have multiple versions of the same instrument, specifically a short form and a long form. For instance, the patient ...
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Preregistration questions sample/outliers
HI I'm extremely new to research and my professor asked me to complete a preregistration for a project he wants to co author. However, I am stuck because the preregistration he asked me to complete ...
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