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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: 29,992
    11-10-2005, 12:21 AM Go to last post
  1. 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: 1,420
    03-12-2014, 03:00 PM Go to last post
  2. 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: 1,751
    03-12-2014, 06:56 AM Go to last post
  3. 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: 1,473
    03-11-2014, 06:08 AM Go to last post
  4. 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: 1,456
    03-09-2014, 01:55 PM Go to last post
  5. 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: 2,061
    03-08-2014, 11:01 PM Go to last post
  6. 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: 1,514
    03-05-2014, 08:38 AM Go to last post
  7. 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: 3,107
    03-04-2014, 12:10 PM Go to last post
  8. 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: 1,818
    03-04-2014, 07:13 AM Go to last post
  9. 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: 1,544
    03-01-2014, 10:40 PM Go to last post
  10. 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: 3,598
    02-28-2014, 06:28 AM Go to last post
  11. 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: 1,623
    02-28-2014, 12:20 AM Go to last post
  12. 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: 1,142
    02-27-2014, 04:36 AM Go to last post
  13. 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: 1,738
    02-25-2014, 05:14 PM Go to last post
  14. 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: 2,457
    02-24-2014, 03:14 PM Go to last post
  15. 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: 14,373
    02-24-2014, 01:17 PM Go to last post
  16. 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: 1,224
    02-22-2014, 02:20 PM Go to last post
  17. 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: 1,080
    02-22-2014, 08:38 AM Go to last post
  18. 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: 3,137
    02-22-2014, 04:22 AM Go to last post
  19. 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: 1,647
    02-19-2014, 03:40 PM Go to last post
  20. 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: 1,522
    02-18-2014, 05:20 PM Go to last post
  21. 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: 1,189
    02-13-2014, 10:50 AM Go to last post
  22. 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: 1,240
    02-12-2014, 11:54 AM Go to last post
  23. 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: 1,274
    02-12-2014, 05:14 AM Go to last post
  24. "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: 1,992
    02-09-2014, 05:25 AM Go to last post
  25. 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: 1,461
    02-08-2014, 05:35 PM Go to last post
  26. 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: 3,666
    02-07-2014, 05:17 PM Go to last post
  27. 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: 1,472
    02-07-2014, 05:12 PM Go to last post
  28. 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: 1,271
    02-07-2014, 01:45 PM Go to last post
  29. 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: 1,725
    02-07-2014, 03:32 AM Go to last post
  30. 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: 16,833
    02-06-2014, 10:31 PM Go to last post
  31. 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: 3,684
    02-05-2014, 01:01 PM Go to last post
  32. 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: 1,542
    02-05-2014, 11:56 AM Go to last post
  33. 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: 1,527
    02-04-2014, 09:10 AM Go to last post
  34. 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: 1,365
    02-02-2014, 02:01 PM Go to last post
  35. 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: 1,442
    01-29-2014, 09:43 AM Go to last post
  36. 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: 2,597
    01-27-2014, 07:21 AM Go to last post
  37. 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: 3,440
    01-24-2014, 06:26 PM Go to last post
  38. 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: 1,269
    01-24-2014, 10:50 AM Go to last post
  39. 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: 2,720
    01-23-2014, 04:45 AM Go to last post
  40. 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: 1,761
    01-22-2014, 10:01 PM Go to last post
  41. 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: 1,576
    01-21-2014, 12:00 PM Go to last post
  42. 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: 1,288
    01-21-2014, 03:26 AM Go to last post
  43. 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: 1,269
    01-21-2014, 03:22 AM Go to last post
  44. 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: 1,500
    01-21-2014, 03:13 AM Go to last post
  45. 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: 2,202
    01-19-2014, 02:18 PM Go to last post
  46. 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: 2,369
    01-18-2014, 09:13 PM Go to last post
  47. 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: 1,893
    01-18-2014, 09:08 PM Go to last post
  48. 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: 1,594
    01-17-2014, 10:09 AM Go to last post
  49. 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: 1,408
    01-17-2014, 01:45 AM Go to last post
  50. 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: 1,663
    01-15-2014, 06:06 PM Go to last post
  51. 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: 1,710
    01-14-2014, 01:17 PM Go to last post
  52. 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: 2,102
    01-14-2014, 10:53 AM Go to last post
  53. Statistical significance of age difference between male and female subjects

    "The ages of the male group were 20.51.2 and the ages of the females 19.22.3. The difference in mean age between the groups is not...

    Started by wildetudor‎, 01-12-2014 09:30 AM
    • Replies: 4
    • Views: 2,328
    01-13-2014, 04:35 PM Go to last post
  54. what (depedent) variable to use when checking normality test

    Hi there, I'm testing whether there is a difference in binge drinkers or Non-binge drinkers verbal declarative memory and processing speed. I...

    Started by Bullseye‎, 01-11-2014 11:07 AM
    • Replies: 3
    • Views: 1,822
    01-12-2014, 07:51 AM Go to last post
  55. Please advise me on the best kind of regression for ordinal data which was factored

    I started with a large number of Likert-type questions containing 5-point attitude scores. I then ran these questions through principal component...

    Started by memomemootoo‎, 01-11-2014 03:39 PM
    • Replies: 0
    • Views: 1,486
    01-11-2014, 03:39 PM Go to last post
  56. Which test should I use?

    Hi all! I'm studying the expression of C-Fos (a stress hormone) in mice brains. Basically, I'm analysing one specific area of the brain and I...

    Started by OlivierJoyal‎, 01-11-2014 02:50 PM
    anova, spss
    • Replies: 2
    • Views: 1,110
    01-11-2014, 03:30 PM Go to last post
  57. Need help choosing statistical test

    Hey, I am conducting a study for my dissertation and I would like to know whether binge drinkers scored worse than non-binge drinkers on 3...

    Started by LehcarP‎, 01-10-2014 03:59 PM
    • Replies: 1
    • Views: 1,182
    01-10-2014, 05:03 PM Go to last post
  58. Exploratory Study -- ordinal data questions

    Hello all, Im a first time poster but have gained much insight reading through past threads. Im running an exploratory study, containing a few...

    Started by JB12‎, 01-10-2014 10:11 AM
    ordinal data
    • Replies: 3
    • Views: 1,752
    01-10-2014, 12:22 PM Go to last post
  59. Scale conversion based on previous research

    Hello, I am using an agent-based model to simulate emotional contagion in teams. I have an article that has determined the "shift" of within person...

    Started by Chauny27‎, 01-09-2014 05:48 PM
    • Replies: 0
    • Views: 1,723
    01-09-2014, 05:48 PM Go to last post
  60. Methods for verifying intependent variable integrity. How?

    Can you help me by describing a few methods for verifying independent variable integrity in single subject experiments? Thank you! :)

    Started by AllieViet‎, 01-09-2014 01:06 PM
    independent variable, integrity, single subject experiment
    • Replies: 0
    • Views: 1,147
    01-09-2014, 01:06 PM Go to last post

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