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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: 24,260
    11-10-2005, 12:21 AM Go to last post
  1. Help with multiple covariates and moderators in analyses

    Hi all, I am trying to figure out the appropriate analyses for a project and I am hitting a bit of a wall. My primary question involves whether...

    Started by spiritcaravan‎, 03-17-2014 02:11 PM
    • Replies: 0
    • Views: 519
    03-17-2014, 02:11 PM Go to last post
  2. Question Need data analysis direction.

    Im a grad student (clinical psychology) and research neophyte and need some direction. Once I gain statistical ground I would be more than happy to...

    Started by Neophyte5‎, 03-16-2014 07:35 PM
    data analysis, psychology, quasi-experimental
    • Replies: 0
    • Views: 544
    03-16-2014, 07:35 PM Go to last post
  3. Non-parametric data analysis - 2 questions

    I have 1 independent variable with 3 levels and four dependent continuous variables The four dependent variables within the levels of the IV...

    Started by hannou‎, 03-16-2014 01:53 PM
    • Replies: 1
    • Views: 522
    03-16-2014, 03:29 PM Go to last post
  4. Analysis of linear regression

    Hi guys, I am working on my dissertation and I stuck on basics... Can you please remind me few things. I've done linear regression of...

    Started by aleksss‎, 03-16-2014 04:37 AM
    • Replies: 0
    • Views: 540
    03-16-2014, 04:37 AM Go to last post
  5. Please Point Me To Resources I Can Use To Interpret This Data

    Okay, So there's this forum devoted to a communication-based game that, in each game, divides players into two different groups. The groups...

    Started by Psyche‎, 03-16-2014 02:42 AM
    • Replies: 0
    • Views: 524
    03-16-2014, 02:42 AM Go to last post
  6. Which test of reliability to use?

    Hi, I am unsure of if I am to use different tests of reliability for different types of data sought by the same questionnaire, or if one test may...

    Started by Riley‎, 03-13-2014 11:49 AM
    cronbach's alpha, data type, reliability test
    • Replies: 1
    • Views: 709
    03-15-2014, 10:46 PM Go to last post
  7. What do I do once I have found an order effect in a within subjects design?

    I have found an order effect in my repeated measures design and am having difficulty figuring out how to run further analyses that control for the...

    Started by kjm8675‎, 02-22-2014 02:22 PM
    • Replies: 4
    • Views: 847
    03-12-2014, 08:07 PM Go to last post
  8. Two way unrelated ANOVA

    Hi, I was wondering whether anybody could help me, i've ran the data in SPSS and can see I have found some significant findings. However I'm...

    Started by abcd123‎, 03-12-2014 04:23 PM
    • Replies: 0
    • Views: 504
    03-12-2014, 04:23 PM Go to last post
  9. Why impose equality constraints on the factor loadings?

    Hi all, I have a few basic SEM questions that I would love to get your feedback on: (1) I have recently read two articles where the authors decided...

    Started by myautumn28‎, 03-12-2014 12:57 PM
    • Replies: 2
    • Views: 818
    03-12-2014, 03:00 PM Go to last post
  10. Unequal Group Sizes

    Hello, I am presently examining questionnaire data and the two groups I am interested in examining are unequal: n = 25 and n = 118. The...

    Started by baddeleywm‎, 03-12-2014 04:35 AM
    • Replies: 4
    • Views: 932
    03-12-2014, 06:56 AM Go to last post
  11. Inter rater reliability (multiple raters, multiple items)

    Hello, I am struggling with inter rater reliability measure. I have measures of perceptions of different items performed by multiple raters....

    Started by Ted Brasil‎, 03-11-2014 06:08 AM
    • Replies: 0
    • Views: 753
    03-11-2014, 06:08 AM Go to last post
  12. please help with analysis confusion

    Hello Could you please help I am doing a study on leadership for my dissertation. I trying to find out which leadership style and the degree...

    Started by Codenamekid91‎, 03-09-2014 01:55 PM
    • Replies: 0
    • Views: 658
    03-09-2014, 01:55 PM Go to last post
  13. Question Power Analysis and Sample Size determination help!

    Hi all! I am new here so I hope my post is appropriate! I have searched the web and this forum and haven't been able to figure out how exactly...

    Started by carlyhylton‎, 03-08-2014 06:33 PM
    2 way anova, power analysis, psychology, sample size, sas
    • Replies: 5
    • Views: 944
    03-08-2014, 11:01 PM Go to last post
  14. Score for categorical data

    Hi! I'm looking for some method to create some kind of a general score for several categorical variables, all of them on Likert Scale. Any...

    Started by raphaelsaldanha‎, 03-05-2014 08:38 AM
    • Replies: 0
    • Views: 633
    03-05-2014, 08:38 AM Go to last post
  15. Unhappy Degrees of freedom don't match participants? (F-test)

    Hi everybody! I'm currently working on my Master thesis, which is going to be a meta-analysis (I hope..). Now me and my thesis partner ran into...

    Started by Jiske‎, 03-04-2014 08:32 AM
    • Replies: 4
    • Views: 1,956
    03-04-2014, 12:10 PM Go to last post
  16. Analysing Multiple Categorical Variables

    I am conducting a study about behavioural practices in a psychological setting (restrictive interventions). The purpose is to determine the...

    Started by Iainoh‎, 02-25-2014 07:10 AM
    • Replies: 8
    • Views: 1,022
    03-04-2014, 07:13 AM Go to last post
  17. One Factor Repeated Measures ANOVA questions

    Hi all, I have conducted a repeated measures ANOVA that has one factor with two levels. I also have a one between-subjects factor that has been...

    Started by GC92‎, 03-01-2014 09:58 AM
    anova, interpretation, one factor, psychology, regression, repeat measures, statisics
    • Replies: 1
    • Views: 863
    03-01-2014, 10:40 PM Go to last post
  18. Talking Rosenberg's Self-Esteem Scale

    I am working on my stats for a final year project and was wondering if anybody here could help answer a few questions? I am using SPSS. I am...

    Started by jcnimmer‎, 02-27-2014 01:14 PM
    • Replies: 2
    • Views: 2,063
    02-28-2014, 06:28 AM Go to last post
  19. If In doubt - which test is best? Para/non Para

    Hi, Which test is best to use with a small sample size? Parametric or non-parametric? (with even distribution), I've got a repeated measures...

    Started by Gpsych‎, 02-26-2014 02:52 PM
    non-parametric, small sample
    • Replies: 1
    • Views: 889
    02-28-2014, 12:20 AM Go to last post
  20. Which size effect with planned comparison?

    Hello. I couldn't find the answer to my question in the forum so sorry if it was already answered. I've conducted an ANOVA (repeated...

    Started by LeoN‎, 02-27-2014 04:36 AM
    • Replies: 0
    • Views: 673
    02-27-2014, 04:36 AM Go to last post
  21. Calculating effect size when conducting planned contrasts/comparisons

    Does anyone know how (if it is in fact possible) to calculate the effect size (say Cohen's d) between planned contrasts/comparisons? For example,...

    Started by Tanned Man‎, 02-25-2014 05:14 PM
    • Replies: 0
    • Views: 985
    02-25-2014, 05:14 PM Go to last post
  22. Reference to justify the use of bootstrap

    Dear all, My colleagues and I conducted a research involving a dichotomous outcome (i.e., the detection of an unexpected event in a particular...

    Started by Fgabarrot‎, 02-21-2014 01:10 AM
    binary dependent variable, bootstrap
    • Replies: 3
    • Views: 1,269
    02-24-2014, 03:14 PM Go to last post
  23. Question Reliability - ω Omega (total/hierarchical

    Hola! I would like to ask about the total (ωt) and hierarchical omega (ωh) as far as interpretation differences are concerned. And one more...

    Started by Martin Marko‎, 02-24-2014 01:17 PM
    • Replies: 0
    • Views: 12,534
    02-24-2014, 01:17 PM Go to last post
  24. Hierarchical multiple regression, from a forum and stats novice

    Hi, I have data from 584 people comprising five personality factors scored for each individual, and their reaction times on a test following random...

    Started by Buff Davis‎, 02-22-2014 02:20 PM
    • Replies: 0
    • Views: 617
    02-22-2014, 02:20 PM Go to last post
  25. Post Which statistical analysis needs to be run ? ANOVA/Paired T-Tests

    So i trying to figure out what analysis i need to use,but im a tad stuck. Im doing a pre and post test design. So a primary school with a...

    Started by retroandbeyond‎, 02-22-2014 08:38 AM
    anova, pre post test analysis, ttest
    • Replies: 0
    • Views: 571
    02-22-2014, 08:38 AM Go to last post
  26. Smile One way ANOVA/ Repeated measures help to choose a test to run

    Hi all, I have some questions that I need to be working on that are related to one way anova and repeated measures. I am not quite sure what tests...

    Started by ari2015‎, 02-18-2014 01:30 AM
    • Replies: 3
    • Views: 1,961
    02-22-2014, 04:22 AM Go to last post
  27. Red face Paired samples t test or ANOVA

    Good evening, I am glad I found this forum, as I have what some might find to be a simple question, but what is a neural pathway creating question...

    Started by Prohet‎, 02-18-2014 11:33 PM
    • Replies: 5
    • Views: 1,028
    02-19-2014, 03:40 PM Go to last post
  28. Comparison of psychophysical methods for sensitivity to small changes

    Hi all I have two different psychophysical clinical test methods I can use to measure a particular quality. For the sake of explanation, lets say...

    Started by Zorro‎, 02-14-2014 04:53 PM
    evaluate, physhophysics, test method
    • Replies: 1
    • Views: 856
    02-18-2014, 05:20 PM Go to last post
  29. Lightbulb Comparing populations of Twins

    Hey guys, first post here, would really appreciate some clarification on a few things in my study. I'm currently performing an online study in...

    Started by Schwartz Champ‎, 02-13-2014 10:50 AM
    • Replies: 0
    • Views: 715
    02-13-2014, 10:50 AM Go to last post
  30. NO COMMON FACTOR VARIANCE in factoral analysis?

    Hi all, I have been told there is a term to describe the scenario when there is no (significant) common factor variance in a factor analysis...

    Started by ShoeBee‎, 02-12-2014 11:54 AM
    factor analysis, terms
    • Replies: 0
    • Views: 708
    02-12-2014, 11:54 AM Go to last post
  31. What can I do with this data?

    Hi, I want to assess the impact of an intervention on social climate on an inpatient ward. I have the mean scores on a questionnaire across a...

    Started by Gpsych‎, 02-12-2014 05:14 AM
    • Replies: 0
    • Views: 612
    02-12-2014, 05:14 AM Go to last post
  32. "Repeated measures" = "within subjects"?

    Hi everyone, I realised I have a doubt about a very simple concept in statistics, that of 'repeated measures'. I've always thought this is just...

    Started by wildetudor‎, 02-07-2014 06:42 AM
    • Replies: 5
    • Views: 1,188
    02-09-2014, 05:25 AM Go to last post
  33. Mixed ANOVA difficulty ! HELP NEEDED

    Hello... im relatively new to psychology statistics and struggling to understand some things. My experiment is a 2 (common vs distinct faces )x 2...

    Started by retroandbeyond‎, 02-08-2014 05:35 PM
    anova, interaction, psychology, statistics
    • Replies: 0
    • Views: 780
    02-08-2014, 05:35 PM Go to last post
  34. Paired T-test effect size

    Can someone please direct me to a calculation for an effect size for a paired samples t-test along with a reference? Thanks in advance.

    Started by mbetennis01‎, 02-07-2014 09:58 AM
    effect size, paired samples t-test
    • Replies: 6
    • Views: 2,091
    02-07-2014, 05:17 PM Go to last post
  35. Implications of low standard deviation for a moderator

    Hello I have a model where Y = b0 +b1*X+ b2*Z +b3*XZ. Z is a moderator in my theory. In my data, Z is measured on a 5 point Likert type scale with...

    Started by rsg‎, 02-07-2014 05:12 PM
    interaction effects, low variance in moderator, moderation
    • Replies: 0
    • Views: 792
    02-07-2014, 05:12 PM Go to last post
  36. questinnaire help for a noob :)

    i am a statsitics newbie and have to do a questionnaire research on pain in children. it's a simple questionnaire with 12 questions, and the...

    Started by ivn‎, 02-07-2014 07:54 AM
    • Replies: 1
    • Views: 790
    02-07-2014, 01:45 PM Go to last post
  37. Simultaneous regressions (?)

    Hi, I wonder whether some of you may have some modelling suggestions. I have a dyadic dataset. For example, the DV could be "I like the other...

    Started by lbv‎, 02-06-2014 04:06 AM
    • Replies: 2
    • Views: 1,007
    02-07-2014, 03:32 AM Go to last post
  38. How to enter ordinal data into SPSS?

    Hi I just wanted to know if there is supposed to be a different way to enter ordinal data, I have never done this before!

    Started by Preeti21‎, 04-12-2011 11:46 PM
    • Replies: 12
    • Views: 14,112
    02-06-2014, 10:31 PM Go to last post
  39. Is 3x2 Factorial ANOVA the right test for this situation??

    I'm helping a friend do some research in public schools. He is trying to determine if the achievement growth of 6th graders in K-8 schools is...

    Started by aballard‎, 02-04-2014 09:04 PM
    • Replies: 6
    • Views: 2,110
    02-05-2014, 01:01 PM Go to last post
  40. HELP PLEASE - TEST (and general) CONFUSION

    Hi, coudl someone please advise me on which test I should be using for the following - I'm assessing the affect of a new ward timetable on...

    Started by Gpsych‎, 02-05-2014 09:19 AM
    • Replies: 3
    • Views: 777
    02-05-2014, 11:56 AM Go to last post
  41. Comparing binary response rates from unequally-sized populations

    Hi all, I would greatly appreciate some help with a behavioural economics experiment I am running. It is a within-subjects design with 3...

    Started by ShrewsMile‎, 02-04-2014 09:10 AM
    • Replies: 0
    • Views: 849
    02-04-2014, 09:10 AM Go to last post
  42. Wanted: Psychology genius who can help me figure out an experimental design

    Hi everyone, Thanks for popping in to help! I have a study idea but i'm getting into a little bit of a muddle with the most important part..the...

    Started by Ant_Thompson‎, 02-02-2014 11:38 AM
    • Replies: 1
    • Views: 826
    02-02-2014, 02:01 PM Go to last post
  43. How to report pairewise comparisons in your article?

    I found a main effect with some significant differences between my variables (i.e. as seen in the pairewise comparisons with Bonferroni correction)....

    Started by Jeroen‎, 01-29-2014 09:43 AM
    • Replies: 0
    • Views: 655
    01-29-2014, 09:43 AM Go to last post
  44. Question Relative and absolute bias - Likert-type data

    I'm working on a data set which was collected through a questionnaire by a certain regulatory institution. 50 institutions (whole population of that...

    Started by ajvar‎, 01-24-2014 04:25 AM
    absolute, bias, likert, relative
    • Replies: 1
    • Views: 1,426
    01-27-2014, 07:21 AM Go to last post
  45. Is it okay to allow insignificantly correlated error terms in SEM models

    Hi, I am running an SEM model and I am allowing two error terms to be correlated because their indicators come from the same test. The correlation...

    Started by myautumn28‎, 01-23-2014 01:55 PM
    • Replies: 4
    • Views: 2,395
    01-24-2014, 06:26 PM Go to last post
  46. URGENT** ANOVA or Regression - Please help

    Hi, I would really appreciate some help with this. I am looking to see if employees' organisational history (such as voluntary/involuntary turnover)...

    Started by CA92‎, 01-24-2014 10:50 AM
    anova, assumptions, levene, levene's test, regression analysis
    • Replies: 0
    • Views: 636
    01-24-2014, 10:50 AM Go to last post
  47. Decomposing ANOVAs - several questions...

    Hi everyone, I am rather unclear about several aspects of how decomposition of effects in ANOVAs should be done. I'll try to phrase these doubts...

    Started by wildetudor‎, 12-18-2013 06:41 PM
    • Replies: 6
    • Views: 1,572
    01-23-2014, 04:45 AM Go to last post
  48. propensity score matching (chatbox conversation)

    01/22 17:35 Jake: i have never studied PSM in any detail but the wikipedia-level summaries i have read make it sound like exactly the same thing as...

    Started by Jake‎, 01-22-2014 08:12 PM
    • Replies: 1
    • Views: 923
    01-22-2014, 10:01 PM Go to last post
  49. Best Omnibus in Lieu of Multiple Ind.-Samples t-Tests

    Howdy Stats Talkers, I was hoping you guys might be able to help me figure out which statistical technique would be best here. I'm analyzing data...

    Started by avantgardener‎, 01-13-2014 08:01 AM
    • Replies: 4
    • Views: 955
    01-21-2014, 12:00 PM Go to last post
  50. which statistical analysis is suitable for this study?

    Hi guys, Briefly describing the study: - 1 IV with three levels (boring, neutral, & fun condition) - 3 DV's (time perception, task rating,...

    Started by buket93‎, 01-19-2014 01:42 PM
    psychology, reporting statistics, research design
    • Replies: 1
    • Views: 744
    01-21-2014, 03:26 AM Go to last post
  51. Should this really be an ANOVA study?

    Hi, I am running a between subjects study for my senior capstone. I will be looking at smell accuracy in either the right or left nostril of my...

    Started by shayriv‎, 01-19-2014 11:07 PM
    • Replies: 2
    • Views: 707
    01-21-2014, 03:22 AM Go to last post
  52. Which model fit indices should I use?

    I am trying to use multi-group CFA to evaluate measurement invariance of a new scale. The scale is 5 items (scores for each item range from 0-112...

    Started by mem162000‎, 01-20-2014 11:37 AM
    • Replies: 2
    • Views: 843
    01-21-2014, 03:13 AM Go to last post
  53. Extrapolating percentile ranks?

    Hi all, I have a feeling my question has a simple answer but I've searched and searched and cannot find it anywhere, perhaps you can help! I...

    Started by nineotwo‎, 01-19-2014 02:18 PM
    • Replies: 0
    • Views: 1,190
    01-19-2014, 02:18 PM Go to last post
  54. Use z-scores in Repeated Measures ANCOVA?

    Hi everyone, My dissertation has participants answer three questions at four different timepoints in a video. For each timepoint, I have averaged...

    Started by rkprice‎, 12-18-2013 07:51 AM
    ancova, repeated measures, standardize, z-scores
    • Replies: 1
    • Views: 1,668
    01-18-2014, 09:13 PM Go to last post
  55. correlated dependent variables with repeated measures

    Should I use classic repeated measures, classic MANOVA, mixed model or none of the above? Study: IV treatment - dichotomous - treatment or...

    Started by alisa‎, 12-27-2013 07:35 AM
    • Replies: 1
    • Views: 1,016
    01-18-2014, 09:08 PM Go to last post
  56. Is a factorial design appropriate here?

    My study will investigate children's vocabulary development during parent-mediated interactive electronic storybook reading. I want to design 6...

    Started by bernardpar‎, 01-17-2014 08:49 AM
    • Replies: 3
    • Views: 939
    01-17-2014, 10:09 AM Go to last post
  57. Comparing differences between groups over time with nominal variables

    Hi all, I'd like to compare differences between groups over time, but I only have a nominal variable to work with ('yes', 'no', 'unsure'). It's a 2 x...

    Started by Ella_10‎, 01-17-2014 01:45 AM
    • Replies: 0
    • Views: 718
    01-17-2014, 01:45 AM Go to last post
  58. How to perform contrast analyses on ANOVA interaction?

    Hi all! :) For my research I have a 2 x 3 design, both variables are nominal. Therefore I performed a two-way ANOVA, or Univariate in SPSS. For...

    Started by jant90‎, 01-15-2014 12:23 PM
    • Replies: 2
    • Views: 989
    01-15-2014, 06:06 PM Go to last post
  59. Do I need to worry about normality, if the DV is a 1-item 10point likert scale ?

    Dear all, I hope you can help me with the following question My design was a 2 x 2 with a single item measuring responsibility on a 10 point...

    Started by plush‎, 01-14-2014 11:29 AM
    normality, parametric, ranked
    • Replies: 3
    • Views: 1,130
    01-14-2014, 01:17 PM Go to last post
  60. What Is F in Univariate Anova Report?

    Hi, can someone tell me where/what is F(_,_) when reporting a univariate anova result? where do i get this from?

    Started by Gpsych‎, 11-21-2013 11:23 AM
    • Replies: 7
    • Views: 1,322
    01-14-2014, 10:53 AM Go to last post

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