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Forum: Psychology Statistics

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

  1. Arrow Sticky Thread 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...

    Started by quark‎, 11-10-2005 12:21 AM
    • Replies: 0
    • Views: 29,846
    11-10-2005, 12:21 AM Go to last post
  1. What analysis should I run?

    Hi, I am not sure which analysis to run based on what I am trying to figure out, any guidance is appreciated. The research question is- are...

    Started by audreye‎, 06-25-2013 03:59 PM
    analysis, data analysis, spss
    • Replies: 6
    • Views: 1,475
    07-22-2013, 05:42 PM Go to last post
  2. Question Meaning of "n" when analyzing data

    Hi all, I am a bit confused with "n" in the context of data analysis. Is "n" (1) the number of participants OR (2) the number of observations? ...

    Started by aceadimeins‎, 07-18-2013 06:00 PM
    • Replies: 4
    • Views: 1,587
    07-20-2013, 05:43 AM Go to last post
  3. Survey Design.

    I have a question about survey design. I'm fairly new to it and am looking to see if such a technique is valid. I am hosting a conference with ~20...

    Started by xelink‎, 07-12-2013 06:26 PM
    • Replies: 6
    • Views: 1,182
    07-19-2013, 05:46 PM Go to last post
  4. Repeated measures MANOVA follow-up

    Greetings everyone. I am new to the forum, so I hope I picked the right section for this thread. Apologies if that's not the case. As you can see...

    Started by Fabio‎, 07-15-2013 05:53 AM
    • Replies: 1
    • Views: 1,476
    07-19-2013, 06:09 AM Go to last post
  5. What is formula for calculating Simple Contrasts test for within-groups ANOVA?

    I need to be able to calculate long hand some Planned Comparison test for a Within-Groups ANOVA framework. I understand the most common tests in such...

    Started by guy‎, 07-08-2013 01:41 PM
    planned comparisons, post hoc test, within-subject anova
    • Replies: 3
    • Views: 2,622
    07-18-2013, 09:37 PM Go to last post
  6. SPSS: Handling Multiple Responses

    Hi Everyone, I have a survey question where participants can select more than one option (e.g. if they have a mood disorder, and an anxiety...

    Started by statsgi‎, 07-11-2013 10:52 AM
    • Replies: 1
    • Views: 1,956
    07-18-2013, 04:56 PM Go to last post
  7. Which ICC to choose if there are missing values?

    I want to say that I am really sorry if this question has already came up but after looking in different posts I could not find good answer. I...

    Started by ata‎, 07-15-2013 06:57 AM
    agreement, icc, missing values
    • Replies: 1
    • Views: 3,314
    07-18-2013, 04:46 PM Go to last post
  8. Survey data analysis - question about sampling weights

    I am analyzing some survey data, and I am confused about how best to weight it. The survey was placed on the internet, and respondents from different...

    Started by oncearunner‎, 07-13-2013 02:45 AM
    • Replies: 1
    • Views: 1,027
    07-18-2013, 04:37 PM Go to last post
  9. Multinomial Logistic Regression

    Hi everyone, I was wondering if I would be able to use Multinomial Logistic Regression in my study. I want to see whether scores on tests of...

    Started by Ant_Thompson‎, 07-13-2013 08:26 AM
    • Replies: 3
    • Views: 2,068
    07-18-2013, 04:09 PM Go to last post
  10. MANCOVA help!

    Hello, Can anybody help me out? I have had my head in books for ages now and I feel like I am going a little mad! They are either too basic or too...

    Started by EmilyMB‎, 07-17-2013 08:16 AM
    mancova
    • Replies: 2
    • Views: 1,618
    07-18-2013, 05:09 AM Go to last post
  11. Is it possible to compare (with ANOVA) results from cross-correlations data?

    Hello, Id appreciate any thoughts or direction to resources for this dilemma. I like to think myself pretty reasonable at statistics, however I'm...

    Started by Laura_Prsn‎, 07-16-2013 06:11 AM
    anova, cross-correlation
    • Replies: 3
    • Views: 1,906
    07-16-2013, 03:25 PM Go to last post
  12. Comparing correlation coefficients from the same sample

    Can anyone tell me how I can do this using SPSS? So I have self-criticism - self-compassion correlation and brooding-self-compassion correlation and...

    Started by rosenmarsh‎, 07-03-2013 12:22 PM
    • Replies: 6
    • Views: 5,533
    07-12-2013, 07:07 AM Go to last post
  13. 3*3 Mixed ANOVA - non parametric test to use??

    Quite simple really. The dependent variable procures ordinal data - I have 2 related factors and 1 unrelated factor. No idea what NP test is...

    Started by psychonut26‎, 07-12-2013 05:24 AM
    • Replies: 0
    • Views: 1,243
    07-12-2013, 05:24 AM Go to last post
  14. SPSS: Comparing my data with data from other studies

    Hi Everyone, I'm working with a likert scale measure which I've scored up for participants in my own study. There are two other studies who also...

    Started by statsgi‎, 06-19-2013 03:04 PM
    • Replies: 6
    • Views: 2,969
    07-11-2013, 10:37 AM Go to last post
  15. Question Power analysis and correlations (effect sizes)

    Hi everyone! Im conducting a power analysis to determine the minimum sample size I will need to detect an effect size of 0.3 (i.e., a...

    Started by Abram Rickards‎, 07-08-2013 12:22 PM
    • Replies: 1
    • Views: 1,175
    07-10-2013, 09:46 AM Go to last post
  16. Psychometrics characteristics - AVE measure

    Dear all, I measure validity and reliability of my questionnaire that presents feedback of users who used our system. I have problem how to...

    Started by tomazv‎, 07-10-2013 08:48 AM
    ave
    • Replies: 0
    • Views: 1,335
    07-10-2013, 08:48 AM Go to last post
  17. Most appropriate statistical test for this nested design

    I currently am conducting a study where I have three variables: one that is binary, and two numerical variables as measured on a ratio scale. Each of...

    Started by emblem101‎, 07-08-2013 10:48 PM
    anova, hypothesis test, nested design, significance test, spss
    • Replies: 3
    • Views: 1,475
    07-08-2013, 11:37 PM Go to last post
  18. Big Five Personality Experiment...ANOVA/MANOVA or something else?

    Hi everyone! I've been given a data set to analyse but I'm a little unsure of which statistic to use. I'm looking at whether there are any...

    Started by Ant_Thompson‎, 07-05-2013 03:36 AM
    • Replies: 6
    • Views: 1,799
    07-08-2013, 11:43 AM Go to last post
  19. Lightbulb Interpreting a significant manipulation which the scale for doesn't predict DV

    Hello, I have a stats conundrum I have an MSc thesis in which two groups were manipulated to either include others in their group, or manipulated...

    Started by thlws‎, 07-08-2013 12:14 AM
    • Replies: 0
    • Views: 733
    07-08-2013, 12:14 AM Go to last post
  20. CFA - number of indicators

    The measure I am using has only two (parcel) indicators per factor. I know this is not ideal for CFA, but my question is - Is there anything extra I...

    Started by Shannon3232‎, 07-07-2013 07:50 PM
    • Replies: 1
    • Views: 1,086
    07-07-2013, 08:14 PM Go to last post
  21. Exclamation Statistical test for analyzing 2*3 between-subject design's main & interaction effect

    Hello, I am now having trouble analyzing my data since I got stuck on selecting the proper statistical test to use. My data is a 2*3...

    Started by AnneLearningStats‎, 07-03-2013 12:51 AM
    factorial analysis, friedman two way anova, interaction effect, non-parametric, scheirer-ray_hare test
    • Replies: 3
    • Views: 1,675
    07-05-2013, 02:36 PM Go to last post
  22. Calculating Item Discrimination Index for a Likert Questionnaire

    I am currently in the early stages of developing a scale that measures prejudicial attitudes. I have just run a pilot study with the first draft of...

    Started by glassviolin‎, 07-04-2013 11:48 PM
    discrimination index, item analysis, likert scale, scale development
    • Replies: 0
    • Views: 4,337
    07-04-2013, 11:48 PM Go to last post
  23. Variables correlation out of factor loadings for meta-analysis

    Hi guys, I'm making first steps with the meta-analysis, and I have some dummy questions regarding which I would like to get your help. 1. In...

    Started by Darko‎, 07-02-2013 09:18 AM
    • Replies: 0
    • Views: 928
    07-02-2013, 09:18 AM Go to last post
  24. Calculate effect size from regression estimates for meta-analysis

    Hi, I really hope someone can help me, I'm a bit stuck.. I'm running a meta-analysis looking at childhood predictors of personality disorders, so...

    Started by JoKo‎, 07-01-2013 05:06 AM
    effect sizes, meta-analysis
    • Replies: 3
    • Views: 3,720
    07-02-2013, 01:33 AM Go to last post
  25. Should I use an ANCOVA?

    Hi Everyone, I'm working with two scales (one measuring therapeutic alliance and one measuring client satisfaction). While scores on these two...

    Started by statsgi‎, 06-27-2013 02:07 PM
    • Replies: 3
    • Views: 2,103
    07-01-2013, 02:12 PM Go to last post
  26. Question about contrasts and covariate in cross-design paradigm

    Hello everyone, I need some expert advise for the following stats question. I am evaluating data for a psychological learning experiment with a...

    Started by Martinpescador‎, 06-27-2013 10:21 AM
    anova, covariate, special contrasts, spss syntax
    • Replies: 0
    • Views: 804
    06-27-2013, 10:21 AM Go to last post
  27. Research Issue: Multi item scale/Confirmatory factor analysis

    We conducted a study on information elaboration in teams. After data sampling our supervisor instructed us to also examine the dependent variable...

    Started by 5254‎, 06-23-2013 07:08 AM
    • Replies: 2
    • Views: 1,273
    06-26-2013, 11:31 PM Go to last post
  28. question about degrees of freedom in ANOVA

    Hello, Just figuring out statistics on my own after doing a psycholinguistics study for my undergrad thesis (never taken a statistics class). ...

    Started by dochme‎, 06-24-2013 09:33 PM
    • Replies: 0
    • Views: 1,746
    06-24-2013, 09:33 PM Go to last post
  29. How do you report Fisher's Least Significant Differences results?

    Hi, I've been looking online to see how to report LSD results but I cannot find anything anywhere! :( I understand for a lot of post hoc/planned...

    Started by Vickstar‎, 06-21-2013 10:41 AM
    • Replies: 1
    • Views: 5,456
    06-24-2013, 04:41 PM Go to last post
  30. Confused about causality

    I'm helping a colleague of mine with his homework for his political science master. He's investigating the effect of political orientation on support...

    Started by Junes‎, 06-18-2013 01:44 PM
    causality
    • Replies: 12
    • Views: 3,237
    06-21-2013, 10:35 AM Go to last post
  31. Question Calculating Z-scores for d' (SDT sensitivity)

    Hello, I have a database which contains three distinct groups. My goal is to compare these groups based on the d' sensitivity index which comes...

    Started by foushad‎, 06-20-2013 11:25 AM
    • Replies: 0
    • Views: 2,875
    06-20-2013, 11:25 AM Go to last post
  32. multilevel growth model--should I include random slopes?

    Hi all, I am trying to determine whether I should include random slopes at level 2 of my growth model. I suspect we are right on the borderline...

    Started by MattH‎, 06-14-2013 02:57 PM
    • Replies: 3
    • Views: 1,560
    06-19-2013, 03:11 PM Go to last post
  33. Exclamation PhD - which statistical analysis to use? MLM, t tests, ANOVA?

    Hi, my research question is "do large cognitive changes precede a period of mood stability?" (N = 30), I have 20 therapy sessions data for each...

    Started by scoobydoo‎, 06-17-2013 09:46 AM
    cluster, cognitive, therapy
    • Replies: 1
    • Views: 1,043
    06-19-2013, 08:08 AM Go to last post
  34. Reduce already explained variance?

    Hello there, I am new to this forum and am very excited about it. Everyone here appears to be genuinely nice and talks about statistics. :) I...

    Started by MichaelT‎, 06-05-2013 12:33 AM
    • Replies: 1
    • Views: 917
    06-19-2013, 01:16 AM Go to last post
  35. Lightbulb Beauty Pageant Method of Analysis

    So, I was watching a beauty pageant last night (Miss USA) and I thought about stats. (I know, what's wrong with me?) What kind of analysis method...

    Started by JKru‎, 06-17-2013 09:22 PM
    analysis
    • Replies: 3
    • Views: 2,864
    06-18-2013, 06:18 PM Go to last post
  36. Which test for this Music Perception data?

    Hi Everyone, I'm analysing to what extent a piece of music must be out of tune before people realise that it is so. Subjects were played one of...

    Started by JimRussell440‎, 06-12-2013 08:52 AM
    • Replies: 2
    • Views: 1,401
    06-18-2013, 01:52 PM Go to last post
  37. Bivariate Normal

    Suppose there are two ability tests, on which scores are normally distributed and correlated .7 with one another. Suppose that there's a criterion...

    Started by Cardano‎, 06-17-2013 04:23 PM
    • Replies: 2
    • Views: 1,318
    06-17-2013, 05:40 PM Go to last post
  38. What statistical test to use? Please help!

    I'm working on an assignment for my university stats course, and one of my questions presents me with a data set and asks me, of the continuous and...

    Started by ellenmichellen‎, 06-17-2013 01:29 AM
    • Replies: 1
    • Views: 1,032
    06-17-2013, 09:58 AM Go to last post
  39. what kind of regression tu use for competition results

    hi, we have botanical data and need to analyze this sort of scenario, in terms of students for the simplicity of explenation: we have a series of...

    Started by elalyg‎, 06-13-2013 03:20 AM
    • Replies: 5
    • Views: 1,881
    06-16-2013, 10:46 AM Go to last post
  40. How Do I Create a line graph for a three-way interaction with a continuous variable?

    I ran a 2 (Time 1, Time 2) X 2 (Prime Type: Secure, Neutral), X (Prime Technique: Implicit, Explicit) X Covariate (Anxiety) Mixed-Subjects ANOVA...

    Started by ToriMC11‎, 06-13-2013 09:16 PM
    graphing, three-way interaction
    • Replies: 1
    • Views: 6,542
    06-13-2013, 09:35 PM Go to last post
  41. Four way mixed design ANOVA / MANOVA Please help?

    In reference to the attached paper, I have been asked to comment on the use of a category of five anger groups in the four-way mixed design analysis...

    Started by MuddyOx‎, 06-10-2013 06:24 AM
    • Replies: 3
    • Views: 4,272
    06-12-2013, 02:39 AM Go to last post
  42. Help choosing a method of analyzing data.

    Ok so I need help trying to analyze my data. This isn't my experiment but it involves a similar situation which I'm using as an example. So lets...

    Started by dontcry‎, 05-30-2013 02:00 PM
    anova
    • Replies: 1
    • Views: 1,279
    06-09-2013, 07:18 AM Go to last post
  43. Question What statistical tools should I use?

    Dear Sir/Madam: I would like to know what statistics tools should I use in my research to test my hypothesizes and measure my variables? ...

    Started by wasel‎, 06-05-2013 06:26 AM
    • Replies: 3
    • Views: 2,229
    06-08-2013, 07:26 PM Go to last post
  44. categorical to numerical

    I have a dataframe that is of categorical value. How do I convert it to numerical value? Is there a built in function in r that does that? Or maybe...

    Started by Harry1789‎, 06-08-2013 05:06 AM
    • Replies: 4
    • Views: 1,784
    06-08-2013, 11:53 AM Go to last post
  45. Unhappy Factorial MANOVA

    Hi everyone I've collected some data which, to me at least, represents a 2x3 between groups design. By this I mean I have two conditions which...

    Started by Renzakuken‎, 06-07-2013 07:40 AM
    • Replies: 0
    • Views: 2,732
    06-07-2013, 07:40 AM Go to last post
  46. Use of extracted factors from EFA with Mancova in SPSS

    For a 2x2 between subjects factorial analysis, I need to test interaction effects of 2 IVs each having 2 levels. The questionnaire has multiple items...

    Started by elik‎, 06-05-2013 05:12 AM
    factor analysis, mancova, manova
    • Replies: 0
    • Views: 1,138
    06-05-2013, 05:12 AM Go to last post
  47. HELP! Factor Analysis theory and algebra!! :(

    Dear talkstats board members, Hello! I am having some trouble in my class on Factor Analysis/Structural Equation Modeling. There is this one...

    Started by amanda01‎, 05-29-2013 11:48 AM
    • Replies: 6
    • Views: 2,198
    06-03-2013, 09:15 PM Go to last post
  48. In need of odds ratio explanation please!

    Can someone please explain to me what a good odds ration is and why? Thanks!

    Started by Leona9987‎, 05-14-2013 06:38 AM
    • Replies: 6
    • Views: 4,995
    05-31-2013, 03:00 PM Go to last post
  49. HELP needed with ANOVA!

    Hi everyone, I am a complete beginner at statistics so please forgive my confusion! I have gave participants a questionnaire to access whether...

    Started by Leanne‎, 05-29-2013 02:35 PM
    anova
    • Replies: 6
    • Views: 1,598
    05-31-2013, 07:15 AM Go to last post
  50. Question 2x2x3 ANOVA interaction and error term formulas?

    Hey guys, I would really appreciate some help with some ANOVA formulas. :) So I'm running a 2 (between) by 2 (between) by 3 (within) design and I...

    Started by Suede‎, 05-30-2013 09:28 AM
    anova, interaction, split-plot
    • Replies: 0
    • Views: 2,458
    05-30-2013, 09:28 AM Go to last post
  51. Negative combach's alfa in evidence based questionnaire

    Hey everyone, For a small research I had to do I used the Rosenberg Self-esteem scale and tried to look for correlations with aggression using the...

    Started by GentlemanA‎, 05-24-2013 02:27 PM
    cronbach's alpha
    • Replies: 8
    • Views: 2,706
    05-29-2013, 11:07 AM Go to last post
  52. Variance of combined normally distributed scores

    I'm trying to compute a average score of several normally distributed weighted variables. To make myself easy, I'm using z-scores. The weights are X1...

    Started by fraatsr‎, 04-23-2013 11:08 AM
    • Replies: 1
    • Views: 2,979
    05-28-2013, 05:36 PM Go to last post
  53. please help me

    Hey Guys I kind of need help with these questions would really appreciate it 1.)When the assumption of sphericity is violated, correction...

    Started by kavi‎, 05-28-2013 02:08 AM
    homework
    • Replies: 1
    • Views: 1,035
    05-28-2013, 02:35 AM Go to last post
  54. Mixed models, Repeated Measures, multiple DVs, SPSS- help!

    Hi there, My data is approximately as follows: 400 participants split over 2 interventions. The participants are school students from 14...

    Started by lir6777‎, 05-27-2013 05:42 AM
    mixed models
    • Replies: 0
    • Views: 2,013
    05-27-2013, 05:42 AM Go to last post
  55. Within-subject comparison

    I randomly exposed subjects (students) to one of two experimental conditions before each of four exams, with their exam performance as the dependent...

    Started by Phoenix123‎, 05-25-2013 06:35 AM
    • Replies: 0
    • Views: 1,865
    05-25-2013, 06:35 AM Go to last post
  56. Can I use a two way repeated measures ANOVA?

    Hi, I'm doing an acoustic experiment where I have the same 10 subjects listening to/undergoing 18 different conditions. I have 3 independent...

    Started by mAcA‎, 05-24-2013 01:39 PM
    • Replies: 0
    • Views: 1,002
    05-24-2013, 01:39 PM Go to last post
  57. omega squared as effect size measure in repeated measure ANCOVA

    Hi, I would like to report the effects size for a repeated measure ANCOVA. Instead of the eta squared it seems that the omega squared is more...

    Started by Flavia‎, 05-24-2013 05:19 AM
    • Replies: 0
    • Views: 1,875
    05-24-2013, 05:19 AM Go to last post
  58. Main effects in factorial ANOVA

    Hello helpful people, I'm doing my comps exam and I have an issue determining what constitutes a main effect in my design. I will conduct a 3x3...

    Started by navigo‎, 05-22-2013 08:41 PM
    • Replies: 1
    • Views: 1,685
    05-23-2013, 07:31 AM Go to last post
  59. Paired-sample or Independent T-test?

    Hi, I have read all of the examples available but I can't tell which test to use because none of the examples use the kind data that I do! Please...

    Started by codma269‎, 05-22-2013 04:45 AM
    -test, archaeology, independent
    • Replies: 1
    • Views: 1,620
    05-22-2013, 06:34 AM Go to last post
  60. Question Performing Pearson Correlation On Multiple (more than 2) Variables

    Greetings all, I am struggling with finding out the Pearson's coefficient when there are more than 2 variables, and would welcome any assistance...

    Started by billcurtis‎, 12-13-2008 06:25 AM
    • Replies: 8
    • Views: 63,108
    05-22-2013, 05:09 AM Go to last post

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