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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, 11-09-2005 11:21 PM
    • Replies: 0
    • Views: 22,541
    11-09-2005, 11:21 PM Go to last post
  1. Help needed with analyzing sensitivity to changes in Musical sounds

    Thank you so much for your advice in advance, I owe you a pint if you are in London! :) I am trying to analyze whether kids with autism are more...

    Started by icsgreen‎, 08-26-2013 10:18 AM
    change detection, music, perception, psychology, statistics
    • Replies: 1
    • Views: 503
    08-26-2013, 11:58 AM Go to last post
  2. Type I and type II errors in multiple factor ANOVA

    Hello, I wonder if someone can explain to me what happens with type I and type II errors as you add more factors to ANOVA design, specifically to...

    Started by dangor‎, 08-26-2013 08:17 AM
    anova, multivariate analysis, type 2 errors, type i error
    • Replies: 0
    • Views: 656
    08-26-2013, 08:17 AM Go to last post
  3. The importance of 'breaching zero' in a bootstrapping mediation Analysis

    Dear all, I am using mediation analaysis as part of my research and I am bit confused about the idea of 'breaching zero' in the confidence...

    Started by kaz‎, 08-25-2013 10:34 AM
    • Replies: 2
    • Views: 999
    08-25-2013, 11:22 AM Go to last post
  4. Exclamation is it possible to convert a pass or fail data into quantifiable data for thesis?

    our thesis is about personality factors affecting performance. and their performance is evaluated to either pass or fail only since its for a...

    Started by mikeecomendador‎, 08-11-2013 11:55 AM
    psychology, statistics, thesis
    • Replies: 9
    • Views: 1,620
    08-24-2013, 10:29 AM Go to last post
  5. T-test vs nonparametric for likert scale (very small sample size)

    Hi everyone, I'm in the process of completing my masters thesis, and while I did my share of psych stats in my undergrad it's been YEARS and I'm a...

    Started by romy‎, 08-24-2013 06:02 AM
    likert scale, nonparametric, parametric, small sample size
    • Replies: 1
    • Views: 923
    08-24-2013, 10:00 AM Go to last post
  6. how to calculate for unbalanced panel data Lagrange-multiplier test

    Hi, I have unbalanced panel data. Using SAS, the null hypthesis of Hausman Test was not rejected (means the random effects model is better than...

    Started by tantan‎, 04-24-2010 10:37 AM
    • Replies: 2
    • Views: 3,189
    08-23-2013, 12:00 PM Go to last post
  7. Smile Data transformation

    Hi all, I have used Fraley's ECR-RS with two subscales, one on attachment-related anxiety and the other on attachment-related avoidance to collect...

    Started by Brownie‎, 08-22-2013 01:46 AM
    • Replies: 3
    • Views: 1,087
    08-22-2013, 06:40 PM Go to last post
  8. Question Urgently need help with data analysis

    Hey folks, i really am desperate for help with this, since I have to present my results at a conference in less than two weeks. I am a...

    Started by Comfort Eagle‎, 08-21-2013 10:10 AM
    correlation, multiple regression, small sample size
    • Replies: 6
    • Views: 1,065
    08-22-2013, 09:42 AM Go to last post
  9. ANOVA question.. no interaction but significant main effect

    Okay.. here it goes.. i have two variables (A and B). A has 4 levels (A1,A2,A3,A4) B has 6 levels (B1, B2, B3, B4, B5, B6) In order to answer my...

    Started by chocolatesummer‎, 08-20-2013 04:56 PM
    • Replies: 2
    • Views: 842
    08-20-2013, 05:26 PM Go to last post
  10. Question nonparametric tests to check the effect of independent variable on dependent variable

    hi im hoping that some one might help me. i want to check the effect of metacognitive skills (MCS) on students presentation and report writing...

    Started by gksiddiqui‎, 08-18-2013 03:22 PM
    • Replies: 2
    • Views: 936
    08-18-2013, 05:25 PM Go to last post
  11. My supervisor got mad. I need help!

    She read a draft of my results and I have a million and one things to correct. I am running mixed MANOVAs on my intervention study data. But...

    Started by Lolly‎, 08-15-2013 04:58 PM
    • Replies: 11
    • Views: 1,404
    08-18-2013, 01:41 PM Go to last post
  12. Repeated Measures ANOVA : Intervention and control group problem

    Hi everyone, this is my first post and like many others I am a master student writing my thesis. I ran an experiment to test the impact of left...

    Started by Melkor‎, 08-17-2013 02:18 PM
    • Replies: 1
    • Views: 1,208
    08-18-2013, 11:40 AM Go to last post
  13. Likert scale with categories - chart to illustrate results

    Ho there, I am currently analyzing a Likert scale questionnaire (5 points) of 28 items. The items of the questionnaire are grouped into several...

    Started by frederiquef‎, 08-18-2013 03:30 AM
    likert chart
    • Replies: 0
    • Views: 931
    08-18-2013, 03:30 AM Go to last post
  14. ANOVA and regression - "the same thing" but different sample size requirements?

    It is often said that ANOVA and regression are the same thing, and indeed the results are equivalent in the cases I've encountered thus far. So I...

    Started by noise‎, 08-16-2013 07:18 AM
    • Replies: 1
    • Views: 759
    08-16-2013, 07:39 AM Go to last post
  15. Reporting statistics in results section

    Hi, I'm writing the results section for an undergraduate report, and to my surprise, I haven't been able to find an answer to this ridiculously...

    Started by Phoenix91‎, 08-15-2013 09:46 PM
    • Replies: 4
    • Views: 770
    08-16-2013, 03:51 AM Go to last post
  16. MANOVA output- What does this mean?

    As I forgot to ask my supervisor yesterday. I have run a MANOVA on two DVs, and in the Multivariate Tests table it says that the main effects of...

    Started by Lolly‎, 08-06-2013 09:29 AM
    manova
    • Replies: 3
    • Views: 1,082
    08-15-2013, 04:53 PM Go to last post
  17. nonparametric test for group differences?

    Hello, I have a simple question. I am not too familiar with nonparametric tests. I want to see if there are group differences in book selection....

    Started by lauralee‎, 08-15-2013 01:22 AM
    • Replies: 1
    • Views: 528
    08-15-2013, 04:58 AM Go to last post
  18. Testing difference between correlations using fishers exact test?

    Hello everyone, I have a sample n= 92 where I am looking for relationships between characteristics (age, gender, religiosity, education) attitudes...

    Started by RachelH‎, 08-14-2013 01:26 PM
    • Replies: 0
    • Views: 697
    08-14-2013, 01:26 PM Go to last post
  19. a method for calculating the proportional mediating effect

    Dear All Hi I am Amir from Iran where we have no a well know psychologist especially in quantitative.I am not good in mediation. I used Preacher...

    Started by amirpakpour‎, 08-14-2013 08:34 AM
    mediating effect, mediation, r-squared
    • Replies: 0
    • Views: 833
    08-14-2013, 08:34 AM Go to last post
  20. Standard Multiple Regression AND APA format write-up

    Hi all, I was just wondering if anyone knew the correct APA format to write up the results of a standard multiple regression ran in SPSS. I have...

    Started by MPsy‎, 08-14-2013 03:47 AM
    apa 6th ed., spss, write ups
    • Replies: 0
    • Views: 1,868
    08-14-2013, 03:47 AM Go to last post
  21. Statistical tests for a research study

    Dear All, Firstly, I am an absolute novice with respect to quantitative statistical analysis and I need a little guidance and all help would be...

    Started by mjm93‎, 07-30-2013 04:55 AM
    • Replies: 2
    • Views: 1,128
    08-13-2013, 02:08 PM Go to last post
  22. What correlation should I run?

    I have two data sets from identical ordinal scales (Never, Rarely, Occasionally, Often, Very Often). What correlation should I run?

    Started by sonishell‎, 08-13-2013 09:29 AM
    correlation, ordinal
    • Replies: 4
    • Views: 825
    08-13-2013, 12:05 PM Go to last post
  23. How to conduct mediation analysis with ordinal (probit) regressions

    Hello everyone, I need to conduct a mediation analysis in which all the variables (i.e., the predictor, mediator, and outcome) are single items...

    Started by rezarta‎, 08-12-2013 04:17 PM
    mediation, ordinal regression, probit, spss
    • Replies: 0
    • Views: 1,549
    08-12-2013, 04:17 PM Go to last post
  24. Interaction of two variables

    Hello all, I am using the effort reward imbalance questionnaire in my thesis research. I am really struggling on how to calculate the imbalance of...

    Started by kaz‎, 08-06-2013 04:07 AM
    • Replies: 6
    • Views: 984
    08-10-2013, 07:51 AM Go to last post
  25. What's the best test - I'm totally confused

    Hi Everybody, I could do with so help here. The main source of my problem is that I'm a little confused as to whether the members of my sample...

    Started by sophie2cu2‎, 08-10-2013 05:06 AM
    • Replies: 0
    • Views: 609
    08-10-2013, 05:06 AM Go to last post
  26. Wink Wilcoxon test

    I encountered the following stats in a results section: Wilcoxon test: z = 2.48, tied p < .007. What does "tied" mean?

    Started by psnoice‎, 08-07-2013 05:09 PM
    wilcoxon-test
    • Replies: 8
    • Views: 944
    08-08-2013, 11:08 AM Go to last post
  27. Interaction and negative binomial regression analysis for criminological thesis

    Hello, For my master's thesis I'm conducting a research on the influence of morality and self-control on self-reported delinquency. Morality is a...

    Started by eneirync‎, 08-06-2013 03:12 PM
    criminology, interaction, negative binomial, ols
    • Replies: 6
    • Views: 2,886
    08-07-2013, 06:59 AM Go to last post
  28. Post Likert scale - categories

    Hello there, For my doctoral thesis, I am analyzing a Likert scale questionnaire (5 points) of 28 items. The items of the questionnaire are...

    Started by frederiquef‎, 08-07-2013 03:48 AM
    • Replies: 0
    • Views: 810
    08-07-2013, 03:48 AM Go to last post
  29. Not sure how to present data - 3D scatter?

    To help aid the reader of my thesis I want to present some perceptual data in a graph or table format, but am unsure what approach to use as I want...

    Started by helpless2k‎, 08-02-2013 11:17 AM
    3 way, perception, psychology
    • Replies: 4
    • Views: 858
    08-06-2013, 07:10 AM Go to last post
  30. Computing the reliability of a single item scale

    I am using a single item measure of self-esteem for my study and have computing the scale reliabilities of my other measures using cronbach's alpha....

    Started by Lolly‎, 08-05-2013 04:58 PM
    • Replies: 2
    • Views: 1,113
    08-06-2013, 07:04 AM Go to last post
  31. Quick question: When reporting on Cronbach's Alpha..

    Do you round up? So if using 2 decimal places, would .885 be rounded up to .89, or do you report it as .88? Many thanks! Lolly

    Started by Lolly‎, 08-05-2013 03:45 PM
    • Replies: 6
    • Views: 5,142
    08-05-2013, 04:51 PM Go to last post
  32. Question Literature review: comparing prevalences calculated from existing data. Chi-squared?

    I am currently conducting a systematic review of the literature on the prevalence and topography of challenging behaviours (such as self-injury and...

    Started by rlh432‎, 08-05-2013 10:56 AM
    compare rates, prevalence, review
    • Replies: 0
    • Views: 962
    08-05-2013, 10:56 AM Go to last post
  33. Stuck on MANOVAs: How do I run a MIXED MANOVA in SPSS?

    I have been searching everywhere online and I really can't find the answer! No uni lecture notes, youtube tutorials, nothing. I need to conduct a...

    Started by Lolly‎, 08-03-2013 09:47 AM
    • Replies: 3
    • Views: 4,895
    08-05-2013, 03:02 AM Go to last post
  34. Chi-square analysis for (possibly) not independent observations?

    Hello all, I have recently passed my PhD viva, and one of the examiners asked me to make a correction in my statistical analysis. I would greatly...

    Started by Leloni‎, 08-02-2013 11:19 AM
    • Replies: 5
    • Views: 1,258
    08-03-2013, 01:25 PM Go to last post
  35. Data not normally distributed-what to do?

    `Hey guys, I'm hoping someone can give me some advice on this. I collected data for 4 continuous DVs from 408 people. I want to do ANCOVAs and so...

    Started by lir6777‎, 08-02-2013 06:42 AM
    • Replies: 5
    • Views: 1,268
    08-02-2013, 10:32 AM Go to last post
  36. Imputation at the item level vs scale level

    Hello all. I wonder if someone could help me to clarify a doubt. It is usually said that it is always better (if possible) to impute at the...

    Started by Holmes‎, 08-02-2013 04:18 AM
    • Replies: 3
    • Views: 866
    08-02-2013, 05:08 AM Go to last post
  37. Which statistical test to use

    Hi everyone, I'm a little bit confused as to what kind of analysis to do, and would really appreciate some advice from people more statistically...

    Started by lindles‎, 07-29-2013 12:02 PM
    • Replies: 10
    • Views: 1,287
    07-31-2013, 07:20 AM Go to last post
  38. Optimal clustering

    I have demographic data which includes birth dates and some binary variables for each of several hundred people sampled. An example for a binary...

    Started by jobxyz1‎, 07-30-2013 06:02 AM
    • Replies: 0
    • Views: 471
    07-30-2013, 06:02 AM Go to last post
  39. Statistically Challenged Psychology student!!!

    Hi everyone, I am really hoping that someone here can help me out. I am really struggling with the analysis for a Psychology study I have conducted,...

    Started by Lolly‎, 07-28-2013 01:05 PM
    3x2, intervention, manova, psychology, stress
    • Replies: 1
    • Views: 1,047
    07-29-2013, 06:37 PM Go to last post
  40. How to concluded surveyed data to result

    I am working on a survey where I have to prove/diprove my hypothesis. I am seeking this help/guidance since I am getting hard time to related my...

    Started by x509‎, 07-28-2013 04:41 AM
    anova, survey, survey analysis
    • Replies: 4
    • Views: 830
    07-29-2013, 11:48 AM Go to last post
  41. Linear discriminant analysis

    Hi All, Here is my problem. I ran a LDA analysis in SPSS and I go a quite high classification accuracy (72.7%) what I find odd is that the Wilk's...

    Started by ilaria‎, 07-26-2013 08:43 AM
    • Replies: 0
    • Views: 655
    07-26-2013, 08:43 AM Go to last post
  42. Lightbulb ANOVA and mediation- could someone CHECK over this with me? Help gratefully received

    Hi, I really hope someone could help me out. I'm having a crisis of confidence. I have a PhD in psychology but it's been a while since I did...

    Started by Binka‎, 05-30-2013 02:47 AM
    anova, mediation, mediation analysis
    • Replies: 8
    • Views: 4,938
    07-26-2013, 05:02 AM Go to last post
  43. Obtaining the standard error?

    I'm trying to calculate the standard error for some data I have collected for my dissertation. It is a factorial design with a within subjects...

    Started by Phoenix91‎, 07-20-2013 11:16 PM
    • Replies: 2
    • Views: 743
    07-24-2013, 05:45 AM Go to last post
  44. 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: 1,211
    07-22-2013, 05:42 PM Go to last post
  45. 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: 803
    07-20-2013, 05:43 AM Go to last post
  46. 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: 858
    07-19-2013, 05:46 PM Go to last post
  47. 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: 1,020
    07-19-2013, 06:09 AM Go to last post
  48. 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: 1,488
    07-18-2013, 09:37 PM Go to last post
  49. 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: 803
    07-18-2013, 04:56 PM Go to last post
  50. 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: 1,823
    07-18-2013, 04:46 PM Go to last post
  51. 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: 558
    07-18-2013, 04:37 PM Go to last post
  52. 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: 1,074
    07-18-2013, 04:09 PM Go to last post
  53. 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: 781
    07-18-2013, 05:09 AM Go to last post
  54. 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: 936
    07-16-2013, 03:25 PM Go to last post
  55. 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: 4,152
    07-12-2013, 07:07 AM Go to last post
  56. 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: 565
    07-12-2013, 05:24 AM Go to last post
  57. 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: 1,757
    07-11-2013, 10:37 AM Go to last post
  58. 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: 686
    07-10-2013, 09:46 AM Go to last post
  59. 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: 642
    07-10-2013, 08:48 AM Go to last post
  60. 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: 817
    07-08-2013, 11:37 PM Go to last post

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