For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science.
3
votes
0answers
23 views
Are there any models of the human visual field of view taking into account head, neck and eye movements and calculating likelihood of fixation?
I would like to know if there are studies that (1) model the field of view taking into account all degrees of freedom of the head, neck and eyes and (2) if there is any probabilistic model assigned to ...
1
vote
0answers
23 views
How to identify participants answering online questionnaires who have not paid attention? [duplicate]
I often analyse data that involves participants completing a selection of psychological tests online. A concern with online testing is that some participants may not complete the task conscientiously. ...
0
votes
0answers
9 views
ANCOVA output help [migrated]
I have initially run a 2x2x2 Anova and found some significant interaction between the independent variables. I then ran a ANCOVA where I added a covariant. I am confused with how to interpret the ...
0
votes
1answer
47 views
How to interpret HLM analyses looking at work group and individual worker effects?
Liden et al (2004, PDF) is an example of a study examining employees in work groups in an organisation. Thus, measures are obtained of both individual workers and of the work groups that they belong ...
3
votes
1answer
70 views
Facet versus scale prediction of Big 5 personality
NEO facets and scales: The NEO model of personality has 5 scales (i.e., extraversion, neuroticism, agreeableness, openness, and conscientiousness). For each scale there are 6 facets (e.g., neuroticism ...
6
votes
2answers
150 views
How to estimate an expected effect size for a planned psychology study?
When planning a psychological study, researchers are often asked to formulate an estimate of expected effect sizes for important hypotheses in the study. This might be the expected group mean ...
3
votes
1answer
28 views
Are cortisol measures more reliable than self-reported fear measures for looking at difference scores?
I was sent an email by a researcher with the following question:
You wrote that difference scores are okay to use if measurement error
is
minimised.
Does that imply that biological ...
3
votes
1answer
72 views
How to compute Chi-square value and degrees of freedom in Excel?
I am trying to understand the statistical test of the chi-square in Excel. I already made the test but I still don't know how to compute the χ² value and what it means, how to compute the degrees of ...
2
votes
2answers
76 views
How to adjust SSE or RMSE for the number of free parameters in the model?
How do I adjust SSE (sum of squared errors) or RMSE (root-mean-square errors) for the number of free parameters in the model?
Is there an "adjusted" RMSD metric similar to the adjusted r-squared ...
7
votes
2answers
177 views
Best practice to handle double negatives when using the expectancy-value model?
My question is regarding the multiplicative combination rule in the Expectancy-value model developed by Fishbein and Ajzen, and the issues regarding the expectancy value-muddle, or the case of "double ...
5
votes
1answer
69 views
Are there any standard psychometric scales that are only applicable to within-subject designs?
A while ago, I asked the question whether Presence questionnaires are valid in between-subject designs (see the question for the background to this assumption).
While the question garnered some ...
7
votes
1answer
137 views
Analysis of parameter estimates from Ratcliff diffusion model
I would like to analyze a dataset in which subjects' reaction time and error rate have been recorded. In order to account for potential speed-accuracy trade-off I am planning to make use of the ...
5
votes
0answers
59 views
Reproducible meta-analysis in psychology
I am a big proponent of reproducible data analysis. In particular, I like when researchers share documents in formats like Sweave and knitr which weave statistical output (e.g., text, tables, and ...
6
votes
1answer
98 views
Controlling for response bias in a forced choice memory task
I want to present participants a pair of items $a$ and $b$, each with an association $x$ or $y$. Later on participants will presented with the items singularly, and asked 'what was the association?'. ...
4
votes
1answer
38 views
Is it reasonable to have a factor with only two levels in a carry-over design for an fMRI study?
I'm planning a carry-over design for an fMRI study.
To save time, since it seems that I'll need a huge number of trials for my purpose, I'm wondering if it's reasonable to have a matrix 2x3x3, ...
6
votes
2answers
339 views
What articles use structural equation modelling in a meta-analytic context to model mediation?
I'm interested in structural equation modelling (SEM) meta-analysis and its application to modelling mediation relationships.
Mike W.-L. Cheung has written a few articles on the topic of SEM ...
9
votes
0answers
189 views
Fitting a psychometric function when data does not lend itself to a sigmoidal fit [pypsignifit]
I'm fitting a psychometric function to a range of data. The majority of this data lends itself to a sigmoidal fit (i.e. participants can do the task), but some individuals are absolutely unable to do ...
8
votes
1answer
131 views
Are there any journal articles in psychology that have promoted and discussed reproducible data analysis?
I consider reproducible analysis to be really important.
In particular, I'd like to see more researchers in psychology:
sharing their data
producing their journal articles using literate programming ...
9
votes
2answers
527 views
What is the standard way to analyze EEG data in a mismatch negativity paradigm?
I'm running an EEG experiment using a modified auditory mismatch negativity (MMN) design, and I'm wondering if anyone can tell me the best method for data analysis (and recommend any stats ...
6
votes
2answers
110 views
The current recommended text for statistics in behavioural sciences
I have an old book: Statistics for the Behavioural Sciences (4th ed.) by Gravetter & Wallnau. I want to transition my textbooks to eBook format, but this book doesn't come like that (as far as I ...
8
votes
1answer
131 views
Which statistical test should I use when there are multiple latent predictors and multiple latent outcomes?
Which statistical method should I use when Predicting organization commitment (composed of 3 latent variables) using the five factors of personality?
Its a cross-sectional design with survey data. ...
8
votes
3answers
261 views
Introductory resources on bayesian modeling for cognitive sciences
On Cross Validated there is a great question about best introductory books for bayesian statistics. Also, Jeromy Anglim blogged recently about use of JAGS, rjags, and Bayesian Modelling, with some ...
10
votes
5answers
971 views
How to analyze reaction times and accuracy together?
Is there a good way to analyze reaction times and accuracy together, other than MANOVA?
I have data from an experiment in which participants had to respond to stimuli in two different conditions in a ...
13
votes
5answers
388 views
Can response time be incorporated into signal detection theory?
In signal detection theory, one typically uses "signal" and "no signal" responses to analyze the data (that is, the analysis is based on a discrete choice for each trial, effectively generating the ...
5
votes
1answer
58 views
Inferring relationships between psychological variables in clinical samples and issues in generalisation
Context
I sometimes speak to researchers studying the relationship between variables in clinical psychology samples.
A typical example is as follows:
100 patients with diagnosed depression
many ...
