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# Forum: Psychology Statistics

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

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: 32,112
11-10-2005, 12:21 AM
1. ### Which stats test would be best to use?

I've got an emotional recognition task. There are 3 emotions (disgust, sad, fear), each with 10 different intensities. I only have 1 group (the...

• Replies: 1
• Views: 2,862
07-08-2016, 08:17 AM
2. ### Which statistical test should be used?

Take a quiz and refresh your knowledge in selecting the appropriate statistical test/procedure to answer a given research question. This...

• Replies: 0
• Views: 1,715
07-07-2016, 03:08 PM
3. ### Reporting Binomial Fully

Hi All! I have completed a number of binomial distributions with published results for my PhD thesis - however I only reported the binomial p...

• Replies: 0
• Views: 839
07-05-2016, 05:43 AM
4. ### What is the chance of finding a partner ?

Hello I am a short film maker who knows nothing about stats. I stumbled across a silly white paper by Peter Backus, that seems to be quite famous...

• Replies: 4
• Views: 2,215
07-03-2016, 12:15 PM
5. ### What is the appropriate test for testing the difference between 3 variables?

Hi all, I have a group of n subjects. Each subject has 3 measurements x, y, and z. 1-What kind of statistical analysis I should perform to see...

• Replies: 3
• Views: 1,586
06-30-2016, 01:37 AM
6. ### Pearson VS Spearman — Choosing and interpreting the test

Hello, I need to fix the problem choosing and interpreting the correct statistical test for my data. I have data from (a) Minnesota Job...

• Replies: 1
• Views: 2,648
06-29-2016, 08:38 AM
7. ### Experimental design: find the deviant

I have a group of trained raters for speech recordings, their rating should be based on the content. not by the gender of the speech. I want to run a...

• Replies: 0
• Views: 1,306
06-27-2016, 12:24 AM
8. ### Non-Normality - Measuring of stereotypes

Hello :) I'm researching a moderated mediation (2x2) with two mediators. To test my MANOVA and moderated mediation I have to check the normality...

• Replies: 0
• Views: 789
06-26-2016, 03:43 PM
9. ### Guidance for type of statistical test to use

I am self doubting myself as I have been looking at this screen for too long. I am interested in testing emotion discrimination in adults using a...

• Replies: 1
• Views: 1,050
06-24-2016, 11:32 PM
10. ### Deleting outliers to boost correlation. A sound practice?

Dear all, I have two measures with a correlation of .20, the sample size is 210. I expected a higher correlation. I deleted around 60 outliers and...

• Replies: 5
• Views: 2,103
06-24-2016, 06:25 PM
11. ### Bonferroni vs. Modified Bonferroni

Hello, I was wondering if anyone knows when it is appropriate to use a Bonferroni correction over a Modified Bonferroni correction? Thanks :)

• Replies: 1
• Views: 1,654
06-18-2016, 07:24 AM
12. ### Factor analysis

Hello! Apologies if the answer is very obvious but i am new to this. I am running an exploratory factor analysis for a scale developement study....

• Replies: 22
• Views: 6,380
06-15-2016, 06:34 PM
13. ### Help me (Bachelor Project) Rank Order Scale

hi, i am from indonesian sorry for bad ENGLISH grammar. i have problem with Rank Scale Order. so here we go, i have questionnaire for 10...

• Replies: 1
• Views: 1,289
06-13-2016, 12:04 PM
14. ### Survey item analysis, two ways to report low rated items. Is my friend wrong?

My friend and I analyzed the same data but came up with two different sets of results :shakehead . I'd like help to understand why. Situation:...

• Replies: 1
• Views: 790
06-09-2016, 07:41 PM
15. ### parametric or non-parametric in comparison of a dependent variable within several gro

down vote favorite I am comparing maths and chemistry scores of students in several schools. I am not comparing the schools with each other. I am...

• Replies: 0
• Views: 1,052
06-09-2016, 04:15 PM
16. ### How often is the null hypothesis true in psychology?

Hullo all, Something that I'm really interested in is the question of what should be the "default" form of statistical analysis used by everyday...

• Replies: 29
• Views: 5,325
06-08-2016, 09:30 PM
17. ### Meta-analysis to compare 3 randomized control trials?

I'm proposing to evaluate an outcome in three completed randomized controlled trials. The primary goal is to analyze a new outcome in each data set...

• Replies: 0
• Views: 1,362
06-07-2016, 11:15 PM
18. ### Studying the combined effects of mothers and fathers depression on child outcomes

Hello everyone! I am new here and am really needing some advice on what is the best statistical method to use for my doctoral research. The...

• Replies: 1
• Views: 950
06-07-2016, 03:06 PM
19. ### How to analyze categorical data with repeated measures?

Dear all, I struggle with the analysis of my data and thought someone here has a suggestion for me. I measured the categorical responses in a...

• Replies: 0
• Views: 937
06-07-2016, 10:51 AM
20. ### Two-way or one-way MANOVA?

Hi all! I'm struggling with the following design: I had 257 respondents filling in my survey with a manipulated website. The website was...

• Replies: 3
• Views: 1,051
06-07-2016, 09:03 AM
21. ### Interpreting repeated measures ANOVA results in Intervention Study

I'm having one of those late night working problems, where I'm suddenly second guessing all my work and I seem to have lost all my statistics...

• Replies: 3
• Views: 2,962
06-06-2016, 06:51 AM
22. ### Identify Outlier

Hi, I need help to identify outlier for my research project :) Model: 2x2 moderated mediation 1.) IV: both are nominal (rich vs. poor & public...

• Replies: 2
• Views: 1,635
06-04-2016, 05:49 PM
23. ### Choosing the right statistical analysis for my research

Hi all, I was wondering if anyone could help me. I'm struggling to figure out which type of analysis I need to use for my research: I have 900...

• Replies: 2
• Views: 1,127
06-04-2016, 04:41 AM
24. ### Methods and Data Analysis for Experimental Study Design

Good day! I am working on my methods section for my dissertation proposal and want to ensure I am thinking through my methods and data analysis...

• Replies: 2
• Views: 2,048
06-03-2016, 06:54 PM
25. ### calculating variance of mean proportions for meta-analysis

We aim to do a meta-analysis on mean proportions using. Thus, individual proportions (accuracy scores) within a study are already averaged to a mean...

• Replies: 1
• Views: 1,126
06-03-2016, 11:51 AM
26. ### Reporting participant numbers for meta analysis

Hi there, I am hoping you may be able to help me with a query I have. I am conducting a meta analysis on Random Control Trials using REVMAN. I...

• Replies: 2
• Views: 976
tcr
06-03-2016, 07:31 AM
27. ### How to adjust means?

I have two teachers giving marks to two groups of students in one class.I find that one of the teachers is more lenient in marking therefore he gives...

• Replies: 3
• Views: 1,209
06-01-2016, 11:05 PM
28. ### Question about performing ANOVA

Hello Everyone! I am Andrew and i am a new member! I have conducted my own research and i am about to report the results and i would appreciate...

• Replies: 3
• Views: 1,389
05-29-2016, 04:18 PM
29. ### Compare means of subgroups of same population

Hi :wave: I tested life satisfaction on a sample of 500 respondents. In the same questionaire I also tested whether the respondent was a smoker or...

• Replies: 2
• Views: 2,309
05-27-2016, 03:54 PM

I'm asking a group of young people who have experienced loss to complete the Posttraumatic Growth Inventory and then a sheet about different factors...

• Replies: 2
• Views: 902
05-27-2016, 01:28 PM
31. ### Help with Nested Design

Hello members, I'm hoping you astute scholars can help me with a stat problem that I can't figure out. I'm stuck at one part of the analysis,...

• Replies: 1
• Views: 1,278
05-26-2016, 11:44 AM
32. ### Designing a chi square test

Hi, I have some doubts about designing in the most correct form a chi-square test. In my experiment, I used 41 visual stimuli (pictures), which...

• Replies: 0
• Views: 698
05-25-2016, 09:59 AM
33. ### Repeated Measures Design & Effect Sizes, Normality

My question is about calculating effect sizes for a repeated measures design with a small sample size. I want to calculate Cohen's d.av (as...

• Replies: 1
• Views: 1,135
05-22-2016, 06:25 AM
34. ### t-test: very odd p value..

Hello, I have a strange p value and I am not sure how to interpret it: t = 5.3592, df = 46.353, p-value = 2.56e-06 Anyone know what to do...

• Replies: 5
• Views: 1,501
05-20-2016, 09:05 AM
35. ### Comparing two means of small sample groups - which statistic should I use?

Hello, As I am struggling a bit with the statistics part of my bachelors thesis, I would appreciate your help and opinions a lot! I've got two...

• Replies: 4
• Views: 1,399
05-18-2016, 09:28 AM
36. ### Analysis of rhythm precision - Which test should I use?

Greetings everyone, I am currently analysing the data which I gathered from my master thesis experiment. My experiment involves measurements of...

• Replies: 0
• Views: 1,121
05-16-2016, 08:58 AM
37. ### Organizing data within SPSS for 2x2x2 repeated measures ANOVA

Hello, I have some data derived from a 2x2x2 experimental design. There are 3 IV's, each with 2 levels. My DV is reaction time (measured in...

• Replies: 0
• Views: 1,137
05-14-2016, 05:00 PM
38. ### HELP PLEASE- Correlation between groups

My objective is to see if there is any relationship between sleep, anxiety and depression. I distributed 3 scales measuring sleep, anxiety and...

• Replies: 1
• Views: 1,258
05-14-2016, 03:30 PM

Hey guys i have a few questions below that I need help with. Anyone please. I can't wrap my head around it even after all the reading. QUESTION 1...

• Replies: 0
• Views: 1,284
05-14-2016, 11:01 AM
40. ### How to perform ANOVA with two groups

Dear Stats Gurus, I hope you can help me with my problem. I'm about to develop an old empirical work of mine, but I don't quite know how. In...

• Replies: 4
• Views: 2,177
05-13-2016, 04:12 AM
41. ### Outliers, winorising and t-test

I have two group of 25 and 27 people. I want to compare them on a sex activity score that vary from 0 to 9. My distribution is algedly normal,...

• Replies: 1
• Views: 926
05-13-2016, 02:29 AM
42. ### Need help with the correct analysis

HI I can't wrap my head around what type of Anova i need to use for my data and if my way of thinking is correct. Been to long since i've used...

• Replies: 0
• Views: 706
05-12-2016, 05:14 PM
43. ### Help with clarification of design and statistical procedure of study

Hello forum, I'm desperately looking for some input and help concerning a study for my doctoral project. I will outline the basic setting and my...

• Replies: 1
• Views: 929
05-12-2016, 03:13 PM
44. ### Help with mixed model analysis

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• Replies: 0
• Views: 645
05-12-2016, 02:47 PM
45. ### Which statistical analysis to run?

Hi All, I'm currently working on my psychology project however, struggling with the results section; I'm not quite sure which analysis to run. ...

• Replies: 4
• Views: 2,406
05-10-2016, 05:43 AM
46. ### Proper analysis for group differences in proportion scores

Hello all, I am running analyses looking at group differences in the proportion of time kids were distressed in a task. I have a task that has...

• Replies: 0
• Views: 1,280
05-07-2016, 03:15 PM
47. ### statisical help

A clinical psychologist is studying the efficacy of a new drug medication for depression. The study includes a placebo group (no medication) versus a...

• Replies: 1
• Views: 3,950
05-07-2016, 06:06 AM
48. ### Narcissism in organizations

For my thesis I have to describe (not execute) a research plan. 374 Employees of a certain company need to fill in a survey, which consist of two...

• Replies: 0
• Views: 1,125
05-04-2016, 06:43 PM
49. ### Using repeated measures change/trend as a predictor variable

I have repeated measures of happiness for a sample of participants, and a single measure of satisfaction for each of the participants. I want to...

• Replies: 0
• Views: 733
05-04-2016, 08:20 AM
50. ### Pearson's Partial Correlation - Transforming one non-normally distributed variable

Hi all, I would be really grateful if someone could advise me on an issue I am having. I am carrying out research looking at the relationship...

• Replies: 1
• Views: 2,832
05-02-2016, 11:10 AM
51. ### Having trouble trying to decided which statistical analysis to use.

I'm writing a paper about Birth Order and Big 5 Personality test. I have Birth order in one column separated as 1= first borns and 2= laterborns....

• Replies: 2
• Views: 1,307
04-29-2016, 07:25 AM
52. ### Likert scale analysis - ordinal or interval??

Hi, I would appreciate some help so much as I feel I am going round in circles with every journal article I read! So I am currently trying to...

• Replies: 26
• Views: 3,544
04-26-2016, 06:31 PM
53. ### Age as covariate?

Hi all, I’ve been struggling with this problem for a while now. The answer is probably pretty straightforward, but I’m not sure what to do...

• Replies: 5
• Views: 1,654
04-25-2016, 04:00 AM
54. ### What analysis for within measures on ordinal scale?

Hi All, I have test scores on an ordinal scale (1-5). All participants took the test twice, but with different time intervals. I want to see if...

• Replies: 0
• Views: 902
04-24-2016, 10:01 AM
55. ### Decomposing a mixed model custom ANCOVA

Here is my scenario. The first paragraph tells a bit about the methods we used to give you a frame of reference. The second tells about the first...

• Replies: 0
• Views: 738
04-22-2016, 03:35 PM
56. ### How to handle missing data?

Hi, I just finished an online study in which participants filled out several questionnaires at baseline and after 6 weeks (posttest). There were...

• Replies: 5
• Views: 1,163
04-22-2016, 03:20 PM

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