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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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Testosterone in women vs. estrogen in men?

It is known that women with higher estrogen are more likely to find men with higher testosterone as more attractive. Positive feedback is also known. But are women with higher testosterone level are ...
rus9384's user avatar
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6 votes
0 answers
990 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 ...
z8080's user avatar
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5 votes
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25 views

Any statistics on the likelihood of, consumption frequencies and dosages required for serotonin syndrome to occur with LSD?

This may be too obscure of a question to have sufficient, if any, statistics on it. If that's the case, any relevant information is appreciated. From what I've gathered, very high doses and/or very ...
A. Kvåle's user avatar
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5 votes
1 answer
419 views

Does Emotional Intelligence (EQ) demonstrate the Flynn Effect?

The Flynn Effect is a well-known phenomenon whereby Intelligence Quotient (IQ) test scores among the general public seem to rise over time. Does Emotional Intelligence (EQ) demonstrate the Flynn ...
Robert Columbia's user avatar
4 votes
0 answers
363 views

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 ...
bernice.anders's user avatar
4 votes
0 answers
51 views

Do I report all anatomical regions in a large significant cluster identified in functional connectivity seed-to-voxel analysis?

I am conducting a resting-state functional connectivity seed-to-voxel analysis on the 25 participants from the NYC test-retest dataset using the CONN toolbox with the Posterior Cingulate Cortex of the ...
Tsvetoslav Ivanov's user avatar
4 votes
0 answers
30 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 ...
Pavel's user avatar
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4 votes
0 answers
517 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 ...
Liz's user avatar
  • 41
3 votes
1 answer
111 views

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 ...
JerBear's user avatar
  • 31
3 votes
0 answers
19 views

Self-report measures always correlate? Research legends or the truest truth

Once upon a time a couple years B.C. (BC stands for before coronavirus), when I was a student, I asked my advisor about using two questionnaires in my research. One was some emotional intelligence ...
Lil'Lobster's user avatar
3 votes
0 answers
75 views

On performing threshold-free-cluster-enhancement permutation tests--in combination with SPM--and then displaying the results on an MNI template

I'm trying out numerous comparison correction methods on my fMRI dataset and I've encountered multiple papers which used threshold free cluster enhancement, which I'd like to incorporate, but I'm ...
Parry's user avatar
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3 votes
0 answers
96 views

Do different ethnic groups have the same standard deviation of the IQ distribution?

There is a lot of research suggesting that different ethnic groups either within US or worldwide if all plotted together would have distributions of IQ with different averages. The reasons for that ...
chugeth's user avatar
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3 votes
0 answers
28 views

Ability of fixed-effects analyses to enable generalisation of results

Is it correct to say that, when making inferrence on the results of an experiment, using a random-effects (RFX) rather than a fixed-effects (FFX) model merely makes the results more generalisable, as ...
z8080's user avatar
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3 votes
0 answers
88 views

Statistic analysis on EEG data - how to deal with it properly?

Let's assume that I have a datasheet looking like that: ...
Mary's user avatar
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3 votes
0 answers
38 views

Task-based fMRI dataset with very simple task (e.g. view stripes)

For my Bachelor thesis I need an fMRI dataset in order to look for causal relationships. I want to be able to confirm my work, so the causal relationships should already be known. Therefore, ideally ...
Katy's user avatar
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3 votes
0 answers
23 views

How do I get calculate D1 and d1 in a multinomial processing tree model?

I've just been reading this paper and I am currently conducting an experiment for my undergraduate thesis. The experiment involves reality monitoring source memory judgments and I therefore want to ...
Gjnn's user avatar
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2 votes
0 answers
28 views

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 ...
Probably's user avatar
  • 325
2 votes
0 answers
33 views

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 ...
Eric Boorman's user avatar
2 votes
0 answers
11 views

How do you model signal detection in an alternative non-forced-choice task?

This question is about signal detection theory for psychology research. Our study used a memory task where participants were given four options: A, B, C, and "I don't know". I have multiple ...
user9154908's user avatar
2 votes
0 answers
134 views

Quantification of tendency for people to believe what is convenient

As a generalization, people have a bias towards believing what is convenient to them and/or doesn't challenge their worldview. I believe (though correct me if I'm wrong) this is linked to status quo ...
Sideshow Bob's user avatar
2 votes
0 answers
32 views

Statistically, what are the determinants of which particular religion someone will follow?

I can look at data on smokers and recent ex-smokers to identify what variables correlate with success in quitting, or relapse. I can adjust for covariates, or leave the analysis unadjusted. I did a ...
Arun's user avatar
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2 votes
0 answers
133 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)
Revious's user avatar
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1 vote
0 answers
15 views

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 ...
Harry Lewis's user avatar
1 vote
0 answers
14 views

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'...
viuser's user avatar
  • 111
1 vote
0 answers
33 views

Choice of statistical analysis for correlational study

Good morning, I am writing a dissertation for my master's degree in psychology. I have to do statistical studies on data that I have collected. I want to proceed with a correlational analysis. ...
lau.'s user avatar
  • 19
1 vote
0 answers
17 views

Other approach to factorisation

I am not sure if this is the ideal forum to ask so if someone can point me to another place that would be good. In a lot of psychology research traditional explanatory factory analysis always seems ...
MaskofIllusion's user avatar
1 vote
0 answers
17 views

Are self-reported depression scores from inpatient facilities used to measure the efficacy of different pharmaceuticals?

In the United States, patients with clinical depression are somtimes hospitalized for sucidal ideation or attempted suicide. It is common practice to prevent patients from discharging themselves from ...
Samuel Muldoon's user avatar
1 vote
0 answers
17 views

Is Cronbach's alpha used outside of psychology?

Tau-equivalent reliability ($\rho$$T$), also known as Cronbach's alpha is a widely used measure of reliability in psychological testing. I've not encountered Cronbach's alpha in other sectors. Does ...
Tony Mobbs's user avatar
  • 1,728
1 vote
0 answers
32 views

Can you prove a psychological theory on a one-person research design?

Famous psychologists have proven their theories on a few subjects (really small sample sizes, like n = 3). Yet, now, we are taught that to prove any psychological theory right, we need to gather data ...
Lil'Lobster's user avatar
1 vote
0 answers
35 views

Need to conduct Exploratory Factor Analysis when using already established questionnaire for Big 5

I am working on a study where I plan to conduct Structural Equation Modeling with the Big 5 factors affecting another variable. For Big 5 I am using a questionnaire that has earlier been used by ...
Ishan Kashyap Hazarika's user avatar
1 vote
0 answers
44 views

Square root transformation of Poisson process. How Var[P(sqrt(lambda))] ~ 1/4?

I am working on Kaggle Neural data challenge. A number of spikes given a stimulus are Poisson distributed as $$Y_i \sim P(\lambda_i)$$ The mean and variance of any Poisson process is given as $$E[P(\...
Saranraj Nambusubramaniyan's user avatar
1 vote
0 answers
1k views

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 ...
Claire Howlin's user avatar
1 vote
0 answers
24 views

What to consider when subsampling

I have a dataset of 364 people in a control group population and about 450 in one comparison group sample and 150 in another comparison group population. We're doing a full analysis of these data. We'...
Amy's user avatar
  • 11
1 vote
0 answers
41 views

What to call variables that measures human's random preferences to select a given experimental stimuli?

I understand that in some cases, given a set of objects, human subjects asked to randomly select one will tend to favor one over others. We all know the situation where "37" will be favored when ...
G. Moore's user avatar
1 vote
0 answers
1k views

Generosity in the World Happiness Score

One factor in the World Happiness Score is generosity. I had trouble to understand what this actually means and how it enters into the score. These were my specific questions: Does "generosity&...
Hans-Peter Stricker's user avatar
1 vote
0 answers
27 views

How many people have a mental disorder in the world at the same time?

According to this article, Mental disorders affect one in four people One in four people in the world will be affected by mental or neurological disorders at some point in their lives But this ...
Pablo's user avatar
  • 227
1 vote
0 answers
37 views

Averaging a linear or nonlinear function treatment

In a hypothetical PET study, my sample consists of a clinical population which exhibit brain hypermetabolism. I divide my sample into two homogenous groups. One receives a treatment whereas the other ...
syntheso's user avatar
  • 121
1 vote
0 answers
46 views

Is it okay to use "fixed number of factors" in EFA after contradicting results from MAP test and eigenvalues?

I need help with my data analysis. I am using a non-validated translated questionnaire in my survey. The purpose of it is not to validate the measure in a different language and its construct validity,...
Hannah Pool's user avatar
1 vote
0 answers
34 views

What is the rule that describes sufficiently large groups will have bad actors?

I once heard of a rule/law/number that described any group sufficiently large enough will have "bad" people in it. It is most often used to describe how online communities will have to deal with ...
Meghan's user avatar
  • 111
1 vote
0 answers
47 views

Correcting for individual differences in the usage (employed range) of rating scales

Experiments that collect subjective ratings (e.g. on a Likert 1-7 scale) necessarily have to account for between-subjects differences in how the range of the rating scale is used by different people, ...
z8080's user avatar
  • 919
1 vote
0 answers
99 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 ...
BCLC's user avatar
  • 707
0 votes
0 answers
36 views

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 ...
Malea Dondé's user avatar
0 votes
0 answers
19 views

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 ...
anon's user avatar
  • 1
0 votes
0 answers
25 views

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 ...
Dhvani Shah's user avatar
0 votes
0 answers
36 views

Are BDSM sexual practices correlated with or related to social-dominance orientation?

When I think about BDSM sexual practices and sexual sadism disorder, I tend to think that it sounds like something that some people with a social dominance orientation would be interested in. This ...
Jude Zambarakji's user avatar
0 votes
0 answers
20 views

Which statistical analysis test to perform to find the difference in connectivity between regions of Default Mode Network?

I have three groups each with 30 participants. I have 30 binary adjacency/connectivity matrix for each group which represents the connectivity between regions of Default Mode Network . I want to find ...
Haya's user avatar
  • 1
0 votes
0 answers
50 views

What kind of statistical analysis is suitable for this simple but unresearched data?

The data is regarding the perceived roundedness of given word stimuli (n=36). Each participant (n=44) rates each stimuli on two scales, roundedness & familiarity (both from 1-7 not round (sharp)/...
WiccanKarnak's user avatar
0 votes
0 answers
44 views

Alternative metrics to assess test validity/reliability

I have two versions of calculating a score for a test (which assesses how well they perform a task). One takes into account the difficulty of the items, the other does not. These tests are ...
user2855666's user avatar
0 votes
0 answers
474 views

How to determine the sample size for a Confirmatory Factor Analysis CFA

I'm in the process of developing a scale. Overall, my question is how do I determine how many participants to include in my sample for the first Confirmatory Factor Analysis procedure? More ...
stephan_phd's user avatar
0 votes
0 answers
22 views

How Really Effective are the Measures of Psychological Tests in Jobs Interviews and Worker Performance After Inside the Workplace

Hello I work doing smalls gig with datasets and also sometimes I create for myself some infographics and data-visualizations of interesting topics for me. for example football, cryptos, virus, etc. I ...
rubengavidia0x's user avatar