Questions tagged [psychology]

Psychology is an academic and applied discipline that involves the scientific study of mental functions and behaviors.

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MANOVA or multiple regression, multivariate regression?

I am looking at the association between feature [ vividness, content specificity, and content narrative] - to three variables on the levels of Depression ( 4 levels - normal, mild, severe, and very ...
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comparing images and narratives for generating an emotion

I am a psychology student. I am doing my dissertation on the ability of images and narratives to generate emotion. I am planning to compare the two. Before doing the same, I am getting the two rated ...
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Can paired t-test be used when data comes from different task conditions at a single time point?

In my experiment a single group of participants performed a cognitive task with two interleaved types of blocks (A and B). Blocks A and B differed in terms of the type of stimuli used but were ...
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Can I use different dimensions from several scales to compile my own measurement?

How can I use different dimensions from several scales to compile my own measurement? Like there are several different structures about burnout, MBI, OLBI and so on. May I use some of their dimensions ...
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Sanity checking survival model

I have some basic statistics foundations (Lean Six Sigma, Industrial Engineering in College), but I'm completely new to survival analysis, and relatively new to Data Science. So I'm looking to sanity-...
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Can I use TukeyHSD to explore my anova interaction in an repeated measures 2 factor experiment? [duplicate]

I am very new to statistics. I have a within subjects, 2 factor experiment in which I will be required to explore an interaction. I was wondering if I can use the TukeyHSD test for this. Any help ...
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Analysing the relationship of the mediating variable with the dependant and independent variable

My research study's hypothesis is Social norms will mediate the relationship between taypayers' perceived fairness of the tax system and voluntary tax compliance behaviour. My scales consists of ...
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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)/...
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Building a research model/path analysis

I'm conducting psycho-oncology research. I am struggling with my model. Could you please help me if the model could look like this? Moreover, I'd like to check the model with the path analysis in AMOS ...
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Correlation between a single item of scale 1 with total score of scale 2

I'm trying to figure out which analysis is most suitable to find whether the correlation between a single item in scale 1 is significantly correlated to the total score of scale 2 (mental wellbeing). ...
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ANCOVA with one factor/independent variable and two covariates in R

I did a study in which participants were randomly divided into 3 conditions, each of which completed a different memory test (with different difficulty levels). Additionally, all participants did an ...
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Which test would be best for my thesis study with 2 variables and 2 levels? I'm considering to run on SPSS, 4 separate correlation tests, OR a MLR

My thesis questions on whether a certain type of thoughts are associated with stress levels. There are two types of thoughts and two different levels. What should I use? The first variable is the ...
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How to use the bwwtrim function of the WRS package? (robust 3-way mixed ANOVA)

in our study, we look at the effects of typical/enhanced body checking on eating pathology before and after the intervention, depending on the level of body concern (see below). Since the assumptions ...
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Mixed effects model for paired subjects in a complex design

I'm new to the mixed effects approach and I'm struggling to understand how to apply it to my relatively complicated experimental design given that all tutorials and articles I read are not directly ...
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Using AIC to compare mediation models with inverted IV and mediator

We have collected correlational data, and are trying to figure out which model could best explain our data. We have two competing mediation models: DV explained by A, mediation by B DV explained by ...
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Getting trustworthy results from small samples and small population

I am an undergraduate student of psychology from Indonesia. Right now I am doing a mini research project where I correlate geographical data to outcomes at the provincial level. The hypotheses is that ...
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how does poLCA work differently when using a three-response format compared to a binary response format?

I am using poLCA on a dataset and I am comparing using binary indicators to a three-response format. Is there any reason why most LCA studies use binary indicators? How will poLCA work differently on ...
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Polynomial Regression sensible in case with 6 cross-sectional points of experience?

I have a dataset of 300 cases of police students, spread over 6 semesters. They all filled out a survey at the same time (cross section), thus their experience is interval scaled since semester 1 ...
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Are there a levels of "goodness" for Adjusted R-Squared values?

In a psychological experiment with an explanatory and a response variable, are there a levels of "goodness" for Adjusted R-Squared to explain the variability of data? I an experimental test, ...
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SPSS Statistics HELP - Likert data

I have a cross sectional sample of around 300 respondents. The sample collects data on individuals living with a certain mental health disorder. The variables are as follows: Continuous dependent ...
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R: lmer test the fixed effect by anova(Model) or anova(Model, model2)?

I have read some tutorials about doing ANOVA to linear mixed model. However, I've faced some problems with testing interaction, main effects, etc. This is what I used to do: Test interaction & ...
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Error Terms in the ANOVA Summary Table

my lecturers require us to write the error term for the effect/source in the ANOVA summary table. Such as below: I don't understand how to find which S(error) term goes to which source. And I do know ...
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How to quantify the effect of a mediator, SPSS, Psychology experiment

I have collected data to answer the question “Does Neuroticism Mediate the effect of a Mindfulness Intervention?” I Have collected pre-intervention Mindfulness Score and a post intervention measure (...
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Unequal sample sizes in 2x2 between-subjects ANOVA

I have a 2x2 between-subjects design consisting of Gender (Male, Female), and Relationship status (Married, Single). The DV is completion of a certain behaviour (Yes, No). I plan to use SPSS. I plan ...
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Computing ICCs in Matlab, to assess rater consistency (inter-rater agreement)

In an experiment, participants rated each of several musical stimuli on 5 aspects (ratings A to E), across ~3,000 trials. Stimuli were performed (by a previous set of subjects) either solo or duo (...
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How to model multi-response data with subjects across multiple experiments?

We have shown people different images and asked them to give a text response. They had unlimited time to provide their response. We have 14 different images, and each person only saw each image once. ...
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Correlation coefficients when oversampling the extremes of a normal distribution

Running some simulations in which I generated two correlated normal variables (rho=0.3), and then took samples of this population in which the extremes of the population where oversampled (...
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Calculating Cronbach's Alpha for New Study Sample

I have been asked to calculate Cronbach's alpha for the instruments used in a completed study which utilized multiple questionnaires composed of Likert-type questions. These questionnaires are already ...
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Can trial-level reaction-times be used to predict subject-level scores of another task?

I would like to predict whether single Reaction-Times (RTs) in a computer task can predict subject performance on a comprehension task. For each subject, I have many RTs but only 1 comprehension score....
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Why will a T value be lower for between subject design then within subject design?

You have run a within-subject experiment. You conduct a t-test and find a t-statistic of 3.5 Because you have no life, you also conduct a t-test suitable for a between-subject design on the data and ...
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How to confirm (for reviewers) that possible nuisance variables have not affected my experimental outcome?

We are undergoing review on an auditory perception experiment. We purposely used naturalistic stimuli, which differ in various acoustic features. To deal with this natural variability, we produced 8 ...
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Power Analysis result weird for multiple regression in R

I have a glmer model: glmer(kept ~ agent_liking*.loneliness + (1|participant_id),family = "binomial", data = d) We collected 150 participants for study 1 ...
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How to interpret EQUIVALENCE TEST results?

The aim of my study is to study the differences between stages of sleep based on the proportion of response when subjects are faced with some stimuli. To begin with I used a classical frequentist ...
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Matchit - Distance between 2 Propensity scores for findings specific pairs

I'm trying to find "spare" controls in case of drop-out in my primary control. I took my primary control sample (n=29), and ran Optimal match for find secondary match sample (N=350 optional ...
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Linear mixed model with one categorical and one continuous fixed effect possible?

I'm planning on using a (linear mixed model) LMM for my analyses but am not 100% sure if it is actually suitable. This is what my data are like: I have one variable measured 4 times for each ...
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Latent Profile Analysis and Statistical Methods in Psychology

There has been a popular phenomenon that has several ‘hallmark’ components, and are uniquely associated with sexual abuse survivors. I would like to verify that the components can stand as a construct,...
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Which statistical test to apply?

I'm trying to find out which delivery time is the best to give out instructions, my data consists of 3 conditions (1st, receive instructions at the beginning) (2nd, receive instructions halfway ...
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Conceptual Question about Effect Size

I have a couple of conceptual questions about Effect Size, hope someone can guide me here. I am told that when I am designing my experiment and I want to establish sample size, I need to specify an ...
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What test to run for multiple IVs predicting multiple DVs?

I am doing my dissertation on the relationship between schizotypy and cognitive functioning. For my main research question, I want to understand if certain subscales of the STA (schizotypy ...
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Can Splithalf Reliability Be Caclulated for an Aggregate Measure?

I have been asked by a journal editor to provide the splithalf reliability for an aggregate dependent variable, d', which is a Signal Detection parameter that captures perceptual sensitivity. However, ...
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I am doing a simple Moderation regression: there is multicolinearity in my model when I add the interaction term. I want to check if this is ok

The first step of my regressionmodel with both predictor variables and the outcome variable meet all assumptions. However when I add the second term there is multicolinearity. This seems obvious since ...
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Significant interaction but non-significant pairwise comparisons

I ran a 3-way ANCOVA (3 within x 3 within x 2 between) and ended up with a significant 3-way interaction (p=0.047, so the significance wasn't large to begin with). I ran additional 3 2-way ANCOVAs for ...
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what type of data analysis should I carry out

In my experiment I have two groups each with 30 participants (experimental group and a control group) The experimental group consists of autistic individuals and the control consists of neurotypical ...
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Should I use a repeated measures MANOVA or several repeated measures ANOVAs?

I'm doing a randomised controlled trial, it has four dependant variables each measured at three time points. The data is normally distributed. My question is how to analyse this. I'm wondering whether ...
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ROC curve as predictive tool in human performance--relationship between $\beta$, $X_C$, and signal probability

I am taking an engineering psychology course in which we are using ROC curves to evaluate human performance in signal detection. Many of the questions on this site about ROC curves are using them as a ...
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Is comparing the errors of k-fold cross validations meaningful if the data was not standardized?

in psychological studies, you measure data from different participants. In order to be able to compare the responses between participants you standardize the data. The other day I was talking to a ...
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What statistical tests or procedures should I conduct for analyzing a repeated measures design experiment?

I have conducted a repeated measures design experiment on Paivio 1971's dual coding experiment, but my two conditions are Dual-Coding (visual + auditory) and Auditory on Animal Sounds. There are two ...
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What issues arise when you perform stats on scores attributed to concepts/objects rather than people? (2-way independent ANOVA example)

• Pianos have 5 different types of black note, and 7 different types of white note, on them. • A famous music psychology paper examined the effects of note colour (black vs white) and instrument (...
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goodness of fit for psychometric data (perceptual threshold)

I'm running an experiment on perceptual thresholds in audio. I'll try not to bog you down with too many details: The experiment is about vibrato speed; specifically, when can you tell the difference ...
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Which test should I use for a three alternative forced choice experiment?

I am running an online survey experiment where participants are randomly assigned to different treatment groups. They are asked to make a three alternative forced choice (3AFC) decision, i.e., pick A, ...
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