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Dason ‎(Devorador de queso)
05-10-2017
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# Forum: Psychology Statistics

Psychological statistics, quantitative psychology. Statistics in social sciences. Experimental design, data analysis.

1. ### Sticky: Please Read This Before Posting

Please provide us with some basic information before we can give useful advice: 1. purpose of the study / research question / hypotheses, if...

• Replies: 0
• Views: 31,392
11-10-2005, 12:21 AM
1. ### Power analysis for GEE

I am designing a study that would require using GEE (generalized estimating equations) to analyze repeated measures of a dichotomous variable. Is...

• Replies: 2
• Views: 1,551
12-18-2015, 07:32 PM
2. ### What analysis do IQ tests use?

I can't find anywhere what statistical analysis IQ tests (like Weschler scales, BAS, etc.) use. It is not stated in any of their material (that I...

• Replies: 3
• Views: 1,416
12-13-2015, 08:34 PM
3. ### Comparing between correlation coefficients

Hi, I have experimental design which includes 3 dependent variables (Reading Mind in the Eyes test and 2 other measures of social cognition, for...

• Replies: 0
• Views: 1,528
12-13-2015, 04:33 PM
4. ### What does it mean to norm an instrument say mathematics attitudes scale?

Hello I was wondering if norming an instrument is the same as developing an instrument say some mathematics attitudes survey or something? I...

• Replies: 1
• Views: 1,707
12-13-2015, 04:22 AM
5. ### marginally significant 3-way interaction ANOVA

Hi everyone, I have to analyze the data of an intervention study, in which a treatment and control group were tested before and after the...

• Replies: 1
• Views: 1,068
12-12-2015, 06:23 PM
6. ### ANCOVA assumptions SPSS help..!

Hi everyone, Just wondering if someone could help me. I need to conduct a repeated measures ancova (4 levels) with no between subjects factor....

• Replies: 0
• Views: 1,400
12-10-2015, 06:54 AM
7. ### When to use Bonferroni

I am working with a mark-all-that-apply survey question that has 8 categorical response options. I am comparing responses statistically between two...

• Replies: 0
• Views: 1,893
12-09-2015, 03:42 PM
8. ### "bias" in chi-square GOF tests?

Simple question (simple for some people) about the chi-square GOF test: Let's say we do a chi-square GOF test where the the expected values are...

• Replies: 1
• Views: 2,988
12-07-2015, 02:40 PM
9. ### Disagreement with my advisor about Cronbach's alpha for my thesis

My psychology thesis is for an interdisciplinary degree, so I wasn't able to take any advanced methods before completing the research. I took two...

• Replies: 2
• Views: 1,332
12-06-2015, 05:34 PM
10. ### What's a good resource to brush up on college level psychology stats?

I've taken quite a few different courses, but have since forgotten some of the details. I'm interested in the applied aspects of sampling, all sorts...

• Replies: 1
• Views: 1,218
12-02-2015, 08:24 PM
11. ### Comparing absolute values of difference scores between two groups

I have two groups (A and B) that each completed a different version of an experimental measure (measure A and measure B). Both groups also completed...

• Replies: 4
• Views: 1,706
12-02-2015, 06:19 PM
12. ### Dealing with Missing Data...

So I have ran into an issue with my study. We utilized Qualtrics to design an online survey/study that had subjects complete 10 questionnaires and...

• Replies: 9
• Views: 3,568
12-01-2015, 07:19 PM
13. ### I failed the 4/5ths Rule. Can I prove it is not significant?

I am a (hypothetical) employer who used an aptitude test to screen candidates for their trainability before hire. I am being sued for discriminating...

• Replies: 1
• Views: 2,147
12-01-2015, 04:47 PM
14. ### 3 experiments and the same 3 scales as DV - run Factorial Analysis together or sep

Hi! I realized three experiments (varying only the marketing context) and used as dependent variables the same three scales (attitude, purchase...

• Replies: 1
• Views: 1,116
12-01-2015, 08:09 AM
15. ### Repeated measures ANCOVA in SPSS help needed with multiple covariates

Hello everyone. Hope someone can help. I have a repeated measures (4) ancova I need to run with no between subjects factor. I have 5 covariates....

• Replies: 2
• Views: 1,389
11-27-2015, 06:14 AM
16. ### Help me in two way anova please

After using log transformation, my data is homogenous. So i want to use two way anova analysis. In that analysis should i data that has been...

• Replies: 3
• Views: 1,448
11-26-2015, 03:32 AM
17. ### Is this data normally distributed?

Got my question answered. Thank you guys

• Replies: 5
• Views: 3,184
11-26-2015, 02:25 AM
18. ### Help in Levene's test, Please

Hi, I did an experiment, studying on the effects of types of sugar and their concentrations on milk spoilage. The sugars I was using are sucrose,...

• Replies: 13
• Views: 37,514
11-25-2015, 03:39 PM
19. ### Incremental validity testing

Hi everyone, The short story first: I was asked by reviewers to formally test whether a variable V1 is incrementally valid (explains more...

• Replies: 0
• Views: 1,470
11-25-2015, 01:00 AM
20. ### t-test help- what is the IV???

I did an experiment where I got data on children’s playmate choices (like if they chose to play with boys or girls or both or neither). My...

• Replies: 8
• Views: 1,547
11-19-2015, 06:07 AM
21. ### multiple regfression

Hello forum.I am very new in statistics so pardon me if the questions are too silly:) Within the frameworks of a lab report, i conducted a multiple...

• Replies: 8
• Views: 1,459
11-16-2015, 11:16 PM
22. ### creating scores based on LCA classification

With LCA (Mplus) on 11 variables, we grouped 1100 patients into 3 classes. Now, we want to create a score, to classify future patients to one of...

• Replies: 0
• Views: 1,195
11-13-2015, 10:13 AM
23. ### How to create norms for a new assessment?

If a novel assessment is created and tested on hundreds of participants, what is the process of converting raw scores to standard scores with a mean...

• Replies: 1
• Views: 1,879
11-12-2015, 11:30 AM
24. ### Bar graph showing difference of means

Is there a way to create a bar graph, with multiple DVs, showing the difference between the means of the IV? I have two experimental conditions and...

• Replies: 8
• Views: 2,183
11-11-2015, 04:57 PM
25. ### Regression to the mean

Hello, I have a question concerning regression to the mean. Suppose there is a test X, which is taken by 30 people. Person A has a score of 10...

• Replies: 1
• Views: 1,237
11-10-2015, 03:09 AM
26. ### What statistical test should I use.

So I am writing a report on whether mean intelligence through an IQ test and mean psychopathy scores (DV) are significant in different types of crime...

• Replies: 0
• Views: 1,448
11-04-2015, 01:17 PM
27. ### How do you display the correlation significance level (.08**) in AMOS

Sorry this is a basic question but I can't figure out how to display the significance level asterisks associated with the correlations/covariances on...

• Replies: 0
• Views: 806
11-03-2015, 03:23 PM
28. ### (SPSS) Meta-analysis about control variables in psychology research

Hello everyone, I'm doing a research on the use of control variables in studies about 'the psychological contract'. I'm almost done with my...

• Replies: 0
• Views: 1,360
11-03-2015, 12:58 PM
29. ### Z-Scores: Finding the score which separates the top 40% from the bottom 60%?

Hi there I am struggling a little with my z-scores. This was one of my questions which I do not understand: For a normal distribution with a mean...

• Replies: 1
• Views: 2,061
11-03-2015, 09:56 AM
30. ### If total variance explained is less than 60%...

I am conducting an exploratory factor analysis of some data exploring bullying behaviour. In my initial EFA I have found that 11 factors were...

• Replies: 4
• Views: 2,928
11-03-2015, 05:17 AM
31. ### How to analyze dichotomous DV with between- and within-subjects factors?

Hello everybody, I am designing a study and need to make sure I'll be able to analyze the data (or else I will modify the design). For the...

• Replies: 2
• Views: 1,579
blc
10-28-2015, 02:55 PM
32. ### Physiological response to musical stimuli

I have performed a study whereby I measure participant’s physiological response (HRV which is a continuous variable) to different musical stimuli....

• Replies: 4
• Views: 1,425
10-28-2015, 06:59 AM
33. ### How to analyse data when subjects received both control and experimental condition?

Dear all, I hope to get some suggestions on how to analyse the data from an experiment I recently ran. My question is whether a new treatment has a...

• Replies: 2
• Views: 1,213
10-27-2015, 10:37 AM
34. ### Checking homogeneity of regression with multiple covariates

Hi, I am running an ANCOVA with 2 fixed factors, while controlling for 3 covariates, and I would like to test the assumption of homogeneity of...

• Replies: 0
• Views: 649
10-27-2015, 08:56 AM
35. ### Help please with bootstrapping HMR SPSS output interpretation and reporting

Hi I am in the middle of writing up a lab that is due in 12 hours (eeekkkk!!) and I am having issues interpreting the SPSS output on a bootstrapped...

• Replies: 0
• Views: 1,308
10-25-2015, 05:01 AM
36. ### Non-parametric and parametric tests combined ??

Hi everyone, I'm achieving a postdoc study in Psychology (75 participants) in Belgium and I need your help... The aim of the study is to look at...

• Replies: 6
• Views: 1,595
10-20-2015, 01:37 PM
37. ### presenting the results of logistic regression with dichotomous IVs

I have a question about how to present the results of a series of 6 logistic regressions in which I have the same 2 dichotomous/binary IVs. The...

• Replies: 1
• Views: 1,329
10-19-2015, 08:13 AM
38. ### w-score vs. z-score with age/sex covariate

Hi everyone, I want to predict gray matter (GM) volume in a group of patients based on their degree of cognitive impairment, corrected for age and...

• Replies: 0
• Views: 1,519
10-15-2015, 10:14 AM
39. ### Research statistics conundrum!

Hello, I'm completing my proposal for my dissertation and I've gotten to the statistical analysis and having a bit of a me***own, hoping to get some...

• Replies: 0
• Views: 1,074
10-15-2015, 04:16 AM
40. ### MANOVA vs Chi Square (and continuous variables?)

**edited to add: Hmmm, maybe I should have named the thread MANOVA vs. Chi Square vs. two regression analyses?** Hi all, I'm in the final stages...

• Replies: 0
• Views: 1,036
10-11-2015, 09:22 AM
41. ### BEST STATISTIC TO USE for TWO STATIC GROUPS?

I am formulating a study which involves first separating participants into two groups for a specific sleep disorder experienced either no/low fear ...

• Replies: 0
• Views: 1,571
10-05-2015, 08:14 PM
42. ### psych stats

vampires in rumanian are 315 years old, on average, with a standard deviation of 5, and the distribution of their ages is mound-shaped and...

• Replies: 3
• Views: 1,352
10-02-2015, 07:10 PM
43. ### value for the balance of 2 categories (while controlling for absolute number)

Hi! Thank you so much for any help! Situation: I have different ascriptions per subject which are categorized in female (f), male (m) and...

• Replies: 0
• Views: 850
10-02-2015, 09:07 AM
44. ### Subscale CFA

Hi, An existing questionnaire I am using (23 items, supposedly 2 subscales, N = 700) has shown poor fit to the 2-factor model as specified by its...

• Replies: 2
• Views: 1,409
10-02-2015, 04:34 AM
45. ### four way anova

Hi, I conduct a research with 4 between-subjects independent variables (2 levels each) and 1 dependant variable. I intrested to find out if there...

• Replies: 1
• Views: 1,880
09-30-2015, 11:38 AM
46. ### Implications for analysis of survey data when recall time frames differ bt questions

Hi, I am advising some folks on setting up a brief survey containing questions that measure some well-known health indicators. My curiosity was...

• Replies: 6
• Views: 2,594
09-30-2015, 10:05 AM
47. ### Logistic Regression Question

I have a continuous predictor variable (a score in a class) from 0 to 100 and a binary outcome variable for the passing of a different class...

• Replies: 1
• Views: 1,489
09-28-2015, 12:54 PM
48. ### Inter-rater reliability for multiple choice questions, 5 raters per question

Hi, I'm interested in how people describe messages posted online, so I'm asking people to read messages and choose their topics. My goal is then...

• Replies: 0
• Views: 773
09-27-2015, 08:28 AM
49. ### Check if Groups differ from Expectation Value

Hi! I have data from RCT with one treatment group and one control group. Each participant filled out a questionnaire once a weak (stanine scores),...

• Replies: 0
• Views: 1,023
09-26-2015, 02:16 PM
50. ### R squared in structural equation modeling

Hello I recently started working with structural equation modeling. I am doing a study for which I tested a model like this: Var1 --> var2-->...

• Replies: 8
• Views: 3,890
09-23-2015, 07:49 AM
51. ### Growth Modeling of Longitudinal Data: Growth factors as predictors in Regression

Hey! i have this following situation. I have a dataset of four measurement occasions. In the first three occasions the same test was introduced....

• Replies: 0
• Views: 1,121
09-22-2015, 04:52 AM
52. ### difference between mailed cohorts and control cohorts

what is the difference between mailed cohorts and control cohorts Ive been given this data to analyse but I'm not sure on what cols2 and 3 refer...

• Replies: 1
• Views: 1,478
09-21-2015, 02:24 PM
53. ### experiemental items in factor analysis

Good morning, everyone. We are analyzing a questionnaire data set, which has some core items and some experimental items. The core items are those...

• Replies: 0
• Views: 1,203
09-21-2015, 09:32 AM
54. ### Calculating Partial Correlation from Published Work

I am working on a meta-analysis, and I read in a published meta-analysis that the researchers calculated partial correlations controlling for two...

• Replies: 1
• Views: 1,413
09-21-2015, 02:40 AM
55. ### Calculating effect size at T2 while controling for baseline differences.

Hi Everyone, I would really appreciate some pointers how I might calculate a treatment V control effect size at T2 (using means, SD's, and sample...

• Replies: 0
• Views: 1,171
09-20-2015, 10:56 AM
56. ### Transforming a negatively skewed ikert scale dependent variable for ANOVA and M.Reg

Hello, I have a negatively skewed Likert scale as my dependent variable and would like to use parametric testing (multiple regression and ANOVA)....

• Replies: 4
• Views: 1,493
09-19-2015, 05:01 PM
57. ### Mixed method ANOVA post hoc confusion?

My experiment had a between-subjects variable of condition (experimental and control) and a within-subjects variable of time (baseline and follow-up...

• Replies: 1
• Views: 1,008
09-19-2015, 01:25 PM
58. ### How to measure- effect of additional categorical DV on repeated m. ANOVA?

Hello, I am helping a colleague analyze data from a user study. I am a little unclear how to deal with one of her measures. I would greatly...

• Replies: 4
• Views: 1,354
09-19-2015, 01:03 PM
59. ### HELP PLEASE :) ANOVAs repeated measures

More I read more I get confused, so please help me ! 1. In 2 (2 conditions)x2 (2 time intervals) within subjects Anova if normality assumption is...

• Replies: 0
• Views: 1,021
09-18-2015, 03:47 PM

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