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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: 22,783
    11-09-2005, 11:21 PM Go to last post
  1. Mixed Model ANOVA Error terms

    Can someone show me, or point me to a resource, that would show how to compute the resulting Error sums of squares that would be produced in a...

    Started by DrJBN‎, 03-27-2013 11:37 AM
    anova, error terms, mixed
    • Replies: 3
    • Views: 978
    04-01-2013, 11:48 AM Go to last post
  2. P values, correlation analysis and sample size.

    Hi all, A question regarding the relationship between p values, correlation analysis and sample size... If I obtain a p = .036 for a...

    Started by Jasmine‎, 03-23-2012 06:42 AM
    • Replies: 8
    • Views: 20,641
    03-31-2013, 09:55 PM Go to last post
  3. By subjects versus by items - Also: Bots rule

    hi, I am doing some stats work at the moment and I have run mixed ANOVA's for both subject and item analysis, but they have come up showing...

    Started by resresd‎, 03-31-2013 10:44 AM
    • Replies: 3
    • Views: 740
    03-31-2013, 05:23 PM Go to last post
  4. Exclamation SPSS Help! What tests to use?

    Hello friends! I am currently analysing some data I have collected about some patients, which includes their demographics and scale ratings based...

    Started by oneleggedalbinopigeon‎, 03-27-2013 04:58 PM
    psychology, spss, statistics, test data
    • Replies: 0
    • Views: 543
    03-27-2013, 04:58 PM Go to last post
  5. Differing Wilk's p values bwteen factors and subscales?

    HI, I am conducting a normality analysis on a paper and pencil test psychological . The test has main factors and sub-scales. The factor score is...

    Started by statdane‎, 03-27-2013 08:47 AM
    • Replies: 0
    • Views: 514
    03-27-2013, 08:47 AM Go to last post
  6. spss - crisis in psychology

    Hello Everyone! I am begging for help!!! i have stupid questions just to make sure i am going in the right direction. I have three questionnaires...

    Started by LuckyKate‎, 03-25-2013 01:29 PM
    • Replies: 1
    • Views: 576
    03-25-2013, 01:50 PM Go to last post
  7. HLM how do I insert control variables on level 1 and on level 2?

    Hi, I´m a beginner, so I´d be greatful for help. I use HLM 7: MY model: employees nested in organizations y= individual´s wellbeing...

    Started by paulina‎, 03-25-2013 10:44 AM
    control variables, fixed effects, hlm, multilevel
    • Replies: 0
    • Views: 1,431
    03-25-2013, 10:44 AM Go to last post
  8. [r] coefficient that compares ellipses

    I'm working on an undergraduate dissertation in Phonetics. (I am on a Linguistics programme so my knowledge of Statistics and Maths in general is...

    Started by jrodd‎, 03-24-2013 09:34 AM
    • Replies: 0
    • Views: 529
    03-24-2013, 09:34 AM Go to last post
  9. Gpower report help

    I am very stuck and wiould really appriciate if someone could read over my results section to make sure I am along the right lines?

    Started by rjf8383‎, 03-23-2013 03:26 PM
    • Replies: 1
    • Views: 518
    03-23-2013, 04:52 PM Go to last post

    Hi, I am a bit confused as to which variables should I include in the factor analysis. I have a huge questionnaire which i know i definitely...

    Started by Astero‎, 03-20-2013 06:14 PM
    demographics, factor analysis, principal components
    • Replies: 3
    • Views: 707
    03-22-2013, 01:38 PM Go to last post
  11. Factorial ANCOVA on reaction times (model using R)

    Hello everyone, I'm currently working on a project in psycholinguistics : we measure RTs in an auditive lexical decision task to determine wether...

    Started by carabosse‎, 03-13-2013 02:50 PM
    • Replies: 1
    • Views: 1,189
    03-21-2013, 03:13 AM Go to last post
  12. Problems with survey answers - answers in wrong spot, inconsistencies in responses

    Thank for all your help, sorry this is so long. I created my own survey as part of my dissertation and have run into problems with responses...

    Started by nerdboy2317‎, 03-20-2013 03:26 PM
    • Replies: 0
    • Views: 451
    03-20-2013, 03:26 PM Go to last post
  13. Can I calculate a pooled Standard Deviation with this information?

    This has left me very frustrated, especially as I believe it to be a very straightforward calculation for a completely standard problem. In the...

    Started by Bevers‎, 03-20-2013 10:47 AM
    • Replies: 0
    • Views: 2,037
    03-20-2013, 10:47 AM Go to last post
  14. Journal Article - which research method used? (Case-control?)

    Heys guys, I am trying to figure out the experimental method used in an article...

    Started by hermes014‎, 03-11-2013 01:11 PM
    • Replies: 6
    • Views: 968
    03-19-2013, 04:55 PM Go to last post
  15. Is a time series model the most appropriate to answer my questions

    I would like to know if I should analyze my data using a time series model (ARMA,...). Context: I want to test a detailed language grid-analysis...

    Started by DaBow‎, 03-19-2013 01:17 PM
    time series analysis
    • Replies: 0
    • Views: 582
    03-19-2013, 01:17 PM Go to last post
  16. Analysing ranked answers


    Started by 50footwoman‎, 03-19-2013 07:47 AM
    help neded, psychology, ranks, statistics, telepathy
    • Replies: 0
    • Views: 513
    03-19-2013, 07:47 AM Go to last post
  17. Missing Value Analysis, Little's test sig (so not MCAR), how to tell if MAR or MNAR?

    Hi Everyone, I have a 7 variable dataset with 500+ participants, and 5.5% of values are missing for a single variable (V7). I'm using SPSS. I...

    Started by Statsallgood‎, 03-18-2013 04:21 PM
    little's, mar, mcar, missing value, mnar
    • Replies: 1
    • Views: 5,736
    03-18-2013, 04:27 PM Go to last post
  18. Desperate for help ASAP

    A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student...

    Started by starfire117‎, 03-16-2013 08:16 PM
    • Replies: 4
    • Views: 1,496
    03-17-2013, 09:09 AM Go to last post
  19. Bad fitting models - what to do next?

    In my study I was doing studying attitudes and their influence on eachother using existing 7-point likert scales. To goal was to models these...

    Started by MrJP‎, 03-14-2013 10:40 AM
    fit indices, reporting statistics, structural equation model
    • Replies: 3
    • Views: 3,059
    03-15-2013, 02:28 PM Go to last post
  20. Very Urgent, please help

    In order to determine the relationship among variables, a Pearson product-moment correlation coefficient matrix was computed pretest measures....

    Started by shiva‎, 03-15-2013 06:56 AM
    • Replies: 1
    • Views: 588
    03-15-2013, 08:59 AM Go to last post
  21. Multiple comparisons of economic game data

    Hi, Any help would be greatly appreciated! I am analyzing some data to which I think I need to make some kind of multiple comparisons correction....

    Started by JonoBone‎, 02-28-2013 06:49 AM
    bonferroni, corrections, multiple comparisons
    • Replies: 1
    • Views: 528
    03-14-2013, 12:31 AM Go to last post
  22. Likert Type Questionnaire Analysis.

    Hi everyone, any help you can offer me with my stats would be so greatly appreciated! Everytime i think i've worked it out, i end up confusing myself...

    Started by statshelpneeded‎, 03-11-2013 11:21 AM
    analysis, chi square, interval data, likert scale
    • Replies: 1
    • Views: 969
    03-14-2013, 12:23 AM Go to last post
  23. Unhappy Moderation with continuous IV and continuous moderator?

    Hi, I am doing a thesis with IVs and proposed moderators are continuous variables, I have read in other threads and webs telling me that I should...

    Started by alanyhl.go‎, 03-12-2013 09:52 PM
    • Replies: 4
    • Views: 811
    03-13-2013, 10:44 PM Go to last post
  24. Confirmatory factor analysis: How to deal with non-normal data

    Hello, I have 12 manifest variables, none of which is normally distributed. As far as I know this makes my data unsuitable for a CFA with maximum...

    Started by Regina‎, 03-12-2013 03:01 PM
    cfa, maximum likelihood, normality
    • Replies: 3
    • Views: 4,978
    03-13-2013, 05:35 PM Go to last post
  25. Fitting log-linear models to survey data with cluster variance corrections.

    Dear folks-- This is not exactly a psych question, but I thought this was the forum wher I would find the most knowledge about log-linear models. ...

    Started by andrewH‎, 03-12-2013 02:03 AM
    clusters, log linear, poisson distribution, survey design
    • Replies: 0
    • Views: 1,237
    03-12-2013, 02:03 AM Go to last post
  26. ANOVA Power Analysis G*Power

    Hi there, i am trying to work out what sample size i need for an anova. I'm not sure which ANOVA mine fits into in G* power. I have 2...

    Started by statshelpneeded‎, 03-11-2013 06:19 PM
    • Replies: 0
    • Views: 813
    03-11-2013, 06:19 PM Go to last post
  27. Calculating descriptive stats for a multiple columns in SPSS 18

    Hi I have transposed survey monkey data into SPSS. I now have data from several questionnaires (approx 12 questions each) and I need to calculate...

    Started by rosenmarsh‎, 03-08-2013 11:42 AM
    • Replies: 1
    • Views: 1,065
    03-10-2013, 01:55 PM Go to last post
  28. Need help with comparing regression coefficients between different models

    Hello, I am estimating two multinomial logistic regression models, each with the same dependent variable, but with different main independent...

    Started by nanerly‎, 03-10-2013 08:55 AM
    compare coefficients, compare groups
    • Replies: 0
    • Views: 732
    03-10-2013, 08:55 AM Go to last post
  29. Please help with my psychology dissertation

    Hi everyone, I'm a third year psychology student currently doing by dissertation and my knowledge of statistics is appalling at best. I was...

    Started by Adderz‎, 03-06-2013 01:58 PM
    • Replies: 2
    • Views: 1,575
    03-08-2013, 02:47 PM Go to last post
  30. Anova manova or regression

    Greetings Statistician Wizards! Firstly, please forgive my silly questions which are following Secondly, I would GREATLY APPRECIATE if you...

    Started by triunk‎, 03-08-2013 08:57 AM
    • Replies: 2
    • Views: 664
    03-08-2013, 09:16 AM Go to last post
  31. Chi-square value less than 1

    In my results, the Pearson x^2 (2, N=54) = 0.307, p = 0.580. Can anyone tell me if there is usually an appropriate range for the critical values?...

    Started by MJH91‎, 03-06-2013 06:08 PM
    • Replies: 0
    • Views: 807
    03-06-2013, 06:08 PM Go to last post
  32. Need help with SPSS20 - to add points for each question and how to enter multiple ans

    I am working on my undergraduate project and struggling with SPSS 20. If some person could have a quick look at what I have done so far, I would be...

    Started by x_sal‎, 03-06-2013 05:48 PM
    • Replies: 0
    • Views: 474
    03-06-2013, 05:48 PM Go to last post
  33. Paired sample t-test and ANOVA

    Hello, I've tried searching for the answer to this question (because I feel it is rather basic) but I haven't had much luck. Anyway, here are the...

    Started by beemer889‎, 03-05-2013 04:58 PM
    • Replies: 2
    • Views: 1,422
    03-06-2013, 08:45 AM Go to last post
  34. Using skewed data in a regression

    Hi, I was wondering if anyone could help me. I am conducting a mediation analysis with regression and one of the variables in negatively skewed the z...

    Started by Jfield7‎, 03-01-2013 06:06 AM
    mediation analysis, regression, skewed
    • Replies: 6
    • Views: 11,577
    03-04-2013, 02:12 PM Go to last post
  35. Correlation and partial correlation

    Hi all, I am having difficult time interpreting my correlations and partial correlations and was hoping someone could help me- thanks in advance....

    Started by melissa88‎, 03-02-2013 03:18 PM
    • Replies: 0
    • Views: 745
    03-02-2013, 03:18 PM Go to last post
  36. Confirmatory factor analysis - MAJOR CONFUSION!!!

    Good afternoon, I'm conducting a study that is evaluating the staff agreement levels when deciding patient attachment styles. Staff were given a...

    Started by aquabunny101‎, 02-27-2013 09:12 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 1,435
    02-28-2013, 02:52 PM Go to last post
  37. Can a scale item be used in more than one factor?

    I am working on a staff survey dataset and in the past the same survey items where used to calculate scores for more than one factor. Is this valid?...

    Started by hopandsolo‎, 02-27-2013 03:47 PM
    • Replies: 0
    • Views: 488
    02-27-2013, 03:47 PM Go to last post
  38. Use Likert scale mean to calculate a ranking of several answers?

    Hello again, As my last question was very successfully answered, which I am very thankful for, I do it again :) I have 6 Likert type...

    Started by Lehmann‎, 02-26-2013 06:28 PM
    • Replies: 3
    • Views: 2,309
    02-27-2013, 09:59 AM Go to last post
  39. Correlation sizes change depending on which format of data you choose to correlate

    Hi everyone, I have recently encountered a situation that sort of drives me crazy: I have two variables that I have converted into percentages. I...

    Started by myautumn28‎, 02-26-2013 02:26 PM
    • Replies: 2
    • Views: 763
    02-26-2013, 03:52 PM Go to last post
  40. Can I say: the data is "almost normally distributed?"

    hello experts, I have data from a questionnaire, in particular musicians spending time on specific music related tasks per week. I calculated a...

    Started by Lehmann‎, 02-20-2013 02:33 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 2,173
    02-25-2013, 05:06 PM Go to last post
  41. a priori power analysis to work out participant numbers

    Hi I am writing up my Methods section for Clinpsych doctorate and I have to write something about how many participants are needed for the...

    Started by rosenmarsh‎, 02-20-2013 01:14 PM
    • Replies: 5
    • Views: 5,856
    02-25-2013, 04:48 PM Go to last post
  42. WANTED: statistical basis for subtest weighting

    Hello everyone, I am planning my Master thesis project in Neuropsychology and I am currently facing a statistical/mathematical challenge. ...

    Started by SophieF‎, 02-25-2013 09:00 AM
    diagnosis, sensitivity, testing, weights
    • Replies: 0
    • Views: 507
    02-25-2013, 09:00 AM Go to last post
  43. A desperate call for help

    Hi, I am working on my psychology project and struggling big time with stats. If some lovely person could have a quick look at what I have done...

    Started by melissa88‎, 02-23-2013 07:12 AM
    • Replies: 1
    • Views: 491
    02-23-2013, 10:08 AM Go to last post
  44. Do I need to nomralize samples or not. frequecies differ but Point biserial looks ok

    I am conducting a study of how supervisors would rate an ideal job candidate in a particular industry on the HEXAC-PI. I have N=94 (males=63,...

    Started by statdane‎, 02-22-2013 02:24 PM
    • Replies: 2
    • Views: 571
    02-23-2013, 06:51 AM Go to last post
  45. power analysis repeated measures anova

    Hello, I am trying to do a power analyse to estimate how many participants are necessary for a replication. The analysis is a repeated measures...

    Started by Hfly‎, 02-21-2013 03:17 PM
    • Replies: 2
    • Views: 2,806
    02-21-2013, 04:18 PM Go to last post
  46. Which ANOVA to use

    Difference between two-way ANOVA and repeated measures ANOVA?

    Started by emilywidnall‎, 02-18-2013 11:20 AM
    • Replies: 1
    • Views: 566
    02-20-2013, 08:31 PM Go to last post
  47. Factor Analysis Question

    I have 41 variables measured on a four point likert scale (they are ordinal at least). I have 809 subjects in the test. Since multicolinearity (MC)...

    Started by noetsi‎, 02-20-2013 04:49 PM
    • Replies: 2
    • Views: 731
    02-20-2013, 05:57 PM Go to last post
  48. Testing interaction of two continuous predictors with ANCOVA - Help

    Hi, I’m a PhD student working on my thesis and having a bit of a dilemma on how to test the interaction of two continuous predictors. My design...

    Started by darc‎, 11-12-2009 05:09 AM
    • Replies: 3
    • Views: 4,044
    02-20-2013, 05:41 PM Go to last post
  49. Examining whether a repeated measure is stable high, or non-stable over time

    Dear all, I have conducted an experiment with a patient versus a control group, in which I asked them to do a reaction time tasks with control...

    Started by Esmee2000‎, 02-20-2013 02:38 PM
    crosslaged panel design, longitudinal design, repeated measures, stability, structural equation model
    • Replies: 0
    • Views: 500
    02-20-2013, 02:38 PM Go to last post
  50. Confirmatory factor analysis

    Hi there, I have had some reviewer comments back on a manuscript and I'm not sure how to respond: 1. Purpose of the study = development and...

    Started by njt14‎, 02-20-2013 10:56 AM
    • Replies: 3
    • Views: 591
    02-20-2013, 01:23 PM Go to last post
  51. Correspondence Analysis: What to report

    I'm writing up an output for a correspondence analysis run on SPSS and would very much appreciate some guidance. I am going to report the...

    Started by stats-student‎, 02-17-2013 01:47 PM
    • Replies: 7
    • Views: 2,862
    02-18-2013, 04:35 PM Go to last post
  52. Query regarding multiple comparisons

    When you perform a permutation test on a two-factor within-subject repeated measures ANOVA, how should you relabel the category information? For...

    Started by tv2012‎, 02-18-2013 12:00 PM
    anova, permutation test
    • Replies: 0
    • Views: 552
    02-18-2013, 12:00 PM Go to last post
  53. Query regarding linearity assumption in Binary Logistic Regression

    I have modelled a logistic regression analysis which includes the combination of categorical and continous explanatory variables. My understanding...

    Started by Collinsbex‎, 02-13-2013 10:07 AM
    • Replies: 1
    • Views: 2,201
    02-15-2013, 01:23 PM Go to last post
  54. Urgent stats help! Multiple comparisons?

    Hello, I just have a quick question understanding multiple comparisons and I'd appreciate any help because I'm on the verge of failing :( I'm...

    Started by ellenmichellen‎, 02-11-2013 11:46 AM
    • Replies: 7
    • Views: 1,176
    02-12-2013, 07:19 PM Go to last post
  55. Checking the normality of residuals - 2x2 mixed ANOVA (spss)

    Hi there, I've come across advice from various sources that when assessing the assumption of normality before deciding whether it is appropriate...

    Started by freofan‎, 02-11-2013 10:48 PM
    • Replies: 0
    • Views: 2,533
    02-11-2013, 10:48 PM Go to last post
  56. 2x2 mixed ANOVA - significant interaction with non significant follow up tests?

    Hi, I've run a study where high and low trait anxious participants were presented with 2 types of material (lets called 'social' and 'physical')...

    Started by freofan‎, 02-11-2013 10:31 PM
    • Replies: 0
    • Views: 1,458
    02-11-2013, 10:31 PM Go to last post
  57. I cannot find the independent variable from my research question

    Basically i know that dependent variable is the one we measure and independent is the one we manipulate, therefore my research question is ''The...

    Started by Izzabel89‎, 02-09-2013 08:27 PM
    • Replies: 8
    • Views: 1,687
    02-11-2013, 03:58 PM Go to last post
  58. Multiple Imputation for missing data

    Hello, I've been doing some reading of articles on multiple imputation but haven't found my question directly addressed. I am doing correlational...

    Started by PikeyJM‎, 02-11-2013 01:27 PM
    • Replies: 3
    • Views: 1,084
    02-11-2013, 03:37 PM Go to last post
  59. Analysising the relationship between team ID and Brand Recall

    Hi all. I have conducted some research into the impact that team identification has upon brand recall from an international sports event. The...

    Started by Student3291‎, 02-08-2013 05:18 AM
    • Replies: 2
    • Views: 828
    02-11-2013, 06:21 AM Go to last post
  60. Please help me with non-parametric tests

    I'm studying for an upcoming test in my advanced statistics course, and I was wondering if anyone could help me understand how to conduct a post hoc...

    Started by ellenmichellen‎, 02-04-2013 09:51 PM
    • Replies: 7
    • Views: 1,345
    02-10-2013, 09:33 PM Go to last post

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