For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science.

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37 views

Bootstrapping in Psychology

I am interested in bootstrap, especially how it's entering the psychologist's world. Boostrapping is used to 'omit' classical assumptions to get statistics. Bootstrapping starts with creating new ...
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1answer
19k views

How to calculate IQ score based on raw score and adjust for age?

I am having a hard time grasping how IQ scores are calculated. I think it has something to do with their age score ratio multiplied by 100. Say I have a test that holds 30 questions. How would I ...
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2answers
74 views

cleanIAT function in R IAT package

Has anyone used cleanIAT (function in IAT package) to compute D-scores for their IAT data? Have you noticed any discrepancies between your D-scores and those of colleagues that used another program ...
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0answers
4 views

Can CES-D scores be meaningfully averaged?

I'd like to compare the CES-D score for people after an event with that of people who never experience that event. Measurements are not paired in relation to anything of significance for people ...
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0answers
11 views

How can I do inferential statistics with Ipsative data scores?

If participants were administered a questionnaire where they were asked to compare two personality traits on how similar they are to a certain social group, and choose the one that is best ...
3
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1answer
46 views

What are some examples of psychology studies with tiny effect sizes and tiny p-values that are good for teaching?

I'm looking for examples of studies where the result is highly significant but the effect is so tiny that it is meaningless in a practical sense. These will be shared with undergraduate psychology ...
2
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1answer
33 views

What is the name for the cognitive bias that ignores that extreme symptoms always tend to get less extreme?

There are some long term diseases where the severity of your symptoms tend towards a 'normal'. So imagine plotting out the severity of the symptoms say, every day or every week, then drawing a line of ...
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3answers
304 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 ...
2
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2answers
95 views

Attributing change in DV to IV manipulation: between-groups (control group) vs mixed-model (pre&post measure)

One often sees researchers attributing a change in the dependent variable to their experimental manipulation, semingly without considering whether this change in DV occurs between or within groups. ...
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58 views

How can Bayesian inference improve upon logistic regression in incorporating psychometric data?

In order to estimate probability of default, banks and other financial institutions have often used logistic regression based on data involving credit history. Suppose an entrepreneur or borrower ...
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0answers
20 views

How common is it for twins conjoined at the head to share thoughts and visual stimuli?

I've always been interested in the possibility of a pair of conjoined twins, joined at the head, being able to read each other's thoughts, react to stimuli that one of them can't see/hear/feel, and ...
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1answer
73 views

How common is the form of amnesia depicted in fictional works?

There are any number of movies and television shows based on some variation of the same premise: A character suffers some sort of mishap (the most frequent mishap being a bump on the head), which ...
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1answer
104 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 ...
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1answer
51 views

Correlation between BIS and BAS responses

As a part of my lab experiment, participants had to answer questions for BIS and BAS (BAS reward, drive and fun) scales. The correlation matrix shows that BIS is significantly positively correlated ...
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2answers
413 views

How should I report results of a likelihood ratio test?

I'm using likelihood ratio testing to assess whether a behavioral model is a better description of my data than a simpler (so called restricted) model. How should results of such statistical tests be ...
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3answers
95 views

Qualitative scoring for responses to design fluency task

Before I can ask my questions, I have to give a little background information. I'm involved in a study using a measure of design fluency. Subjects are shown a page full of squares, like the one ...
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2answers
385 views

Fitting a psychometric function when data does not lend itself to a sigmoidal fit

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 ...
3
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1answer
76 views

Analysis of RTs when speed-accuracy trade-off leading to ceiling accuracy has occurred

I know that it is not desirable for behavioural data to show a (within-subjects) speed-accuracy trade-off, as it can lead to e.g. the wrong interpretation of a single subject's decreased RTs as ...
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0answers
8 views

Talk for lay audience: determining private traits and attributes from online behaviour

This question was referred from Cross-Validated Stack Exchange: I need to give a talk on statistic / machine learning as applied to determining an individual's traits and attributes from online ...
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0answers
15 views

Analyzing movement data for a checkerboard

For a psychology experiment - subject has to learn that the 2D grid is a checkerboard, and collect all the 1s (rewards). How do I test if subjects are actually doing it in the most optimal way -- ...
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2answers
402 views

How should results from linear mixed models (LMMs) be reported?

Are there any official APA guidelines for reporting linear mixed model results? Can I take an approach similar to what would be done with an ANOVA (i.e., report the p-value, standard error and .95-CI ...
7
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2answers
359 views

Which statistical tests to use when analyzing NASA TLX?

The NASA Task Load Index (NASA-TLX) is a subjective, multidimensional assessment tool that rates perceived workload. A set of different scales (Mental Demand, Physical Demand, Temporal Demand, ...
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1answer
120 views

How to measure precision in classical test theory framework?

What methods or approaches exist or might be developed to measure precision of measurement in a classical test theory framework? Standards for Educational and Psychological Testing (American ...
7
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1answer
120 views

What are the most used statistical methods in WM research besides (generalized) linear modeling?

I mean, by cognitive psychologists. I skimmed over a few articles from Journal of Cognitive Neuroscience and Trends in Cognitive Science and concluded that ANOVAs and t-tests are mostly used (without ...
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2answers
89 views

How to know whether a methodological technique is quantitative or qualitative?

How do you classify NASA TLX, ANOVA, Matched Pair T-Test, Self-Efficacy Scale, and System Usability Scale? Are these types of data analysis considered quantitative or qualitative? Please answer ...
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2answers
61 views

Are psychiatric disorders merely statistical deviations?

When we suppose that a segment X of the population is at high-risk for disorder Y, don't we assume that anyone carries the same psychophenotype, yet not in a statistically-significant degree?
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2answers
149 views

Calculating d-prime

I'm currently working on a research that has to use and calculate D Prime values for a task where subjects are presented an image at different speeds and they have to report if they saw the image or ...
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1answer
107 views

How to find the upper and lower quartiles of the Ryff scale?

I received this question via email and thought the answer might be sufficiently general to be worth posting here. I have used the Ryff scale in my research . Actually I am confused about the ...
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2answers
3k views

How long does physical attraction typically last in a permanent relationship?

How long, on average (and with as much other statistical data, e.g. standard deviation, as possible) does physical attraction between male and female in a permanent relationship last? I believe this ...
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1answer
44 views

Do more accidents happen when you cross the street on red light(as a pedestrian)? [closed]

As I wanted to have concrete question in the title I've chosen this one. But my real toughts behind that is if you have ever heard about anything like, I would call it, the 'Red-Light-Theory'? It ...
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1answer
1k views

What tools are available for EEG analysis on the R platform?

I'm starting some EEG studies on attention, and would really like to use R for preprocessing (filtering/artifact rejection), visualization, and analysis, but I can find very little in the way of ...
4
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2answers
113 views

Origin of group-level statistics in psychology and cognitive neuroscience

In experimental psychology and cognitive neuroscience today, with the exception of a few specific subdisciplines, the consensus seems to be that an experimental study has to be performed on a group of ...
4
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1answer
80 views

Optimal number of dimensions in multidimensional scaling

I have run an experiment on consonance-dissonance evaluation of musical intervals on 40 individuals using all the possible intervals from 3 registers (plus their inversions), and I want to apply a ...
8
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1answer
107 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 ...
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158 views

What to do when you have a speed-accuracy trade-off in your data?

Many studies report that a speed-accuracy trade-off (SATO) did not occur in the data since there is a positive correlation between RTs and error rates. In other words, people took longer to respond ...
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3answers
446 views

Should raw response time data be transformed?

I am a statistician and doing some data analysis in cognitive sciences. I noticed that the distribution of response time (RT) is chisq-squared-like, and I want to do Box-cox transformation to make it ...
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1answer
829 views

NEO-FFI $t$-score calculation

I am a CS student who has to do an analysis on the NEO-FFI test. I have the results of the questionnaire, however, I couldn't find how to calculate t-scores or raw scores. There are lots of academic ...
2
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2answers
198 views

How to report an F statistic in APA style?

How do you report F statistics in APA format? I am working on PHD and am not certain that I am reporting the F statistics in the proper manner. I have been reporting it as F (_,_). The second space I ...
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0answers
25 views

Is there an extension of multinomial process models that incorporates response latencies?

In an experimental setting where a categorical response has to be given, the same response can, in theory, be generated by different latent processes. For example, in an experiment where participants ...
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0answers
78 views

Where to find statistical prevalence data for psychopathology over time?

Are there any places where is possible to find historical data for trends of psychological disease? For example some Google website (similar to google trends or NGrams)
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6answers
6k 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 ...
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2answers
1k views

When is it defendable to use manifest instead of latent variables in psychological research?

In psychology, most of the concepts, theories, ideas etc. of interest refer to latent variables, where a latent variable is one that can't be observed directly. Instead, one has to find a manifest ...
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2answers
189 views

Prevalence of psychological “problems”

Giulio Cesare Giacobbe is an expert of psychosynthesis. In one of his books (Alla Ricerca delle Coccole Perdute) he speaks of childish, neurotic people. He says most people are childish and neurotic. ...
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2answers
72 views

Is cognitive science hypothesis-based or bound to strict experiments involving statistics?

When I look at medical journal articles on Google Scholar I see a lot of stuff based on double blind placebo tests. From this, I've gathered that medicine often performs experiments. I've been in ...
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2answers
85 views

Statistics books for educational psychologists?

I plan to study educational psychology in the near future. I know research methods is a big thing for educational psychologists, so I wanted to get a firm grip on the statistical knowledge required ...
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1answer
4k views

What are the real life applications for Probability Learning?

Probability learning is a principle that states probability of a response tends to match the probability of the reinforcement. How does one achieve such rationality under uncertainty? What are ...
7
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1answer
143 views

Significant baseline, Oddball paradigm

I recently conducted an EEG experiment using a passive Oddball paradigm with two experimental conditions : standard stimuli (occurring with a 85% probability) and deviant stimuli (occurring with a 15% ...
4
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0answers
192 views

How to analyse accuracy, hits and false alarms in e-prime?

It's the first time for me to do analyses with e-prime, and I have to analyse some data from an experiment. The data are, at the moment, in e-prime. I'd like to have the accuracy, the hits, and the ...
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3answers
3k 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 ...
7
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1answer
83 views

What paper discussed the cognitive properties of Likert/visual analogue scales in ratings?

I seem to recall a recent paper investigating whether ratings created using Likert or Visual Analogue Scales formats had the cognitive properties of interval or ratio data (since they are generally ...