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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: 21,233
    11-10-2005, 12:21 AM Go to last post
  1. Non-parametric Chi-square test outputs *different* when order is reversed?

    Hello, I am a physics graduate student and am conducting research on physics learning and teaching. I surveyed n=63 students Likert scale 1 to 4...

    Started by snowfalcon_cu‎, 04-11-2013 09:57 AM
    chi-square, non-parametric test, spss
    • Replies: 5
    • Views: 863
    04-12-2013, 06:20 AM Go to last post
  2. non-parametric ANCOVA?

    Dear all, I would appreciate any help on a much debated issue of non-parametric ANCOVA. I compare 2 gourps (group is a factor, categorical), y...

    Started by akh‎, 04-11-2013 07:17 AM
    ancova, non-parametric
    • Replies: 7
    • Views: 4,250
    04-11-2013, 02:11 PM Go to last post
  3. non-parametric equivalence /non-inferiority test for ratio variable?

    Good day , I'm comparing subjects' success rates in two conditions A and B. All subjects run both conditions, so the data is paired. Each subject...

    Started by akh‎, 04-11-2013 07:01 AM
    equivalence testing, non-inferior, non-parametric, ratio
    • Replies: 0
    • Views: 953
    04-11-2013, 07:01 AM Go to last post
  4. Confidence intervals. Correct interpretation?

    Hi there, I am hoping someone can let me know if I have made the correct inferences regarding confidence intervals on a Pearson correlation...

    Started by Maybel‎, 04-08-2013 10:52 PM
    • Replies: 2
    • Views: 1,273
    04-09-2013, 08:58 PM Go to last post
  5. Chi-square help

    hey guys I need help! I need to make a background research on a chi-square test of independence and I'm having trouble getting the two nominal...

    Started by randya456‎, 04-09-2013 08:45 AM
    • Replies: 1
    • Views: 647
    04-09-2013, 09:04 AM Go to last post
  6. Help needed with 3 condition mixed design stats (ANOVA / T-TEST?)

    Hi, I have conducted an experiment on short-term media violence using a GSR machine (measures physiological response) and questionnaire. The aim...

    Started by Psychostats‎, 04-06-2013 09:38 AM
    • Replies: 6
    • Views: 1,056
    04-09-2013, 05:59 AM Go to last post
  7. 4 X 2 Chi Square with small n

    I'm trying to run a chi-square looking at ethnicity (4) across group (3). Some of my cells have less than n = 5. I've been unable to locate any...

    Started by evrobinson‎, 03-29-2013 11:10 PM
    • Replies: 3
    • Views: 996
    04-08-2013, 09:16 AM Go to last post
  8. Question Need help for ANOVA test !!

    Hi guys ! Hope everyone is all good ! My question: I conducted a mixed design ANOVA for my experiment. My SD/Mean and interaction graph...

    Started by psychtalk‎, 04-06-2013 08:40 AM
    • Replies: 1
    • Views: 518
    04-08-2013, 09:14 AM Go to last post
  9. Help with hypothesis

    I came across this forum when searching for help with my homework. I have to write a simple correlation hypothesis and a mediation hypothesis. I...

    Started by Agape000‎, 04-06-2013 10:55 PM
    • Replies: 0
    • Views: 579
    04-06-2013, 10:55 PM Go to last post
  10. Interpretation of Monte Carlo Significance for Chi-Square Analysis

    I am currently utilizing a 4x7 chi-square and cannot collapse any columns or rows, resulting in expected cell counts of less than 5 in 14 cells...

    Started by Psychology.Christine‎, 04-05-2013 10:33 PM
    chi-square, exact tests, interpretation, monte carlo
    • Replies: 0
    • Views: 1,229
    04-05-2013, 10:33 PM Go to last post
  11. Testing for homogeneity of variance for a LARGE sample

    I am wondering if someone can help me determine if I have met the assumption of homogeneity of variance within a sample size of 5,000. I have read...

    Started by PikeyJM‎, 04-04-2013 06:37 PM
    • Replies: 1
    • Views: 1,263
    04-05-2013, 10:33 AM Go to last post
  12. multiple mediators and multiple dvs - different results AMOS and MEDIATE (Hayes)

    I have a path model (longitudinal data): 1 independent variable (iv), 4 potential mediators (ms), 4 dependent variables (dvs); I compared models (chi...

    Started by AnneBaeuerle‎, 04-05-2013 09:33 AM
    amos, mediate macro, mediation
    • Replies: 0
    • Views: 1,376
    04-05-2013, 09:33 AM Go to last post
  13. Question is there a Fisher's exact test (or similar) for continuous data?

    I have a simple statistical problem, but am having a hard time identifying a good solution. I am interested in testing to see if an independent...

    Started by abaugh‎, 04-02-2013 06:13 PM
    continuous dv, fisher's exact test
    • Replies: 3
    • Views: 2,749
    04-04-2013, 09:16 PM Go to last post
  14. Comparing results presented as percents. Best method

    Hi folks, I was wondering if you could help me wrap my head around the best way to present some data and the best statistical test to use to...

    Started by Midsummer333‎, 04-03-2013 07:43 PM
    comparisons, hypothesis testing, percentages, psychology
    • Replies: 1
    • Views: 636
    04-04-2013, 08:37 AM Go to last post
  15. Number of Human Subjects

    I'm a high school student, state science fair is coming up, and I've got to make my project the best it can be. Why isn't it already the best it can...

    Started by Sora57‎, 04-03-2013 11:41 PM
    • Replies: 1
    • Views: 626
    04-04-2013, 06:27 AM Go to last post
  16. Utilizing Individual Data Points in an ANOVA, Reliability, Replication

    Hi all. Suppose you are conducting a study with n=10 subjects. Each subject runs through a behavioural experiment for treatment A and treatment...

    Started by jeffbruce‎, 03-28-2013 01:14 PM
    anova, average, reliability, replication
    • Replies: 1
    • Views: 640
    04-03-2013, 09:30 PM Go to last post
  17. Beyond a t-test repeated measures to evaluate scales scores after reeducation ?

    Hi, i'd like to have your advice about statistics methods to apply in my resaerch. I have seven subjects who have been evaluated twice...

    Started by telepro‎, 04-03-2013 08:06 AM
    • Replies: 0
    • Views: 531
    04-03-2013, 08:06 AM Go to last post
  18. How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs?

    How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs? IVS: I manipulated race of a job candidate (black or white) as well as the...

    Started by norajones‎, 04-03-2013 01:22 AM
    • Replies: 0
    • Views: 784
    04-03-2013, 01:22 AM Go to last post
  19. Question Requesting Help with Dissertation

    Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

    Started by orvokki‎, 03-28-2013 03:58 AM
    • Replies: 1
    • Views: 559
    04-01-2013, 06:32 PM Go to last post
  20. 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 12:37 PM
    anova, error terms, mixed
    • Replies: 3
    • Views: 903
    04-01-2013, 12:48 PM Go to last post
  21. 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 07:42 AM
    • Replies: 8
    • Views: 19,853
    03-31-2013, 10:55 PM Go to last post
  22. 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 11:44 AM
    • Replies: 3
    • Views: 692
    03-31-2013, 06:23 PM Go to last post
  23. 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 05:58 PM
    psychology, spss, statistics, test data
    • Replies: 0
    • Views: 509
    03-27-2013, 05:58 PM Go to last post
  24. 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 09:47 AM
    • Replies: 0
    • Views: 464
    03-27-2013, 09:47 AM Go to last post
  25. 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 02:29 PM
    • Replies: 1
    • Views: 517
    03-25-2013, 02:50 PM Go to last post
  26. 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 11:44 AM
    control variables, fixed effects, hlm, multilevel
    • Replies: 0
    • Views: 1,229
    03-25-2013, 11:44 AM Go to last post
  27. [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 10:34 AM
    • Replies: 0
    • Views: 481
    03-24-2013, 10:34 AM Go to last post
  28. 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 04:26 PM
    • Replies: 1
    • Views: 475
    03-23-2013, 05:52 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 07:14 PM
    demographics, factor analysis, principal components
    • Replies: 3
    • Views: 573
    03-22-2013, 02:38 PM Go to last post
  30. 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 03:50 PM
    • Replies: 1
    • Views: 1,025
    03-21-2013, 04:13 AM Go to last post
  31. 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 04:26 PM
    • Replies: 0
    • Views: 393
    03-20-2013, 04:26 PM Go to last post
  32. 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 11:47 AM
    • Replies: 0
    • Views: 1,962
    03-20-2013, 11:47 AM Go to last post
  33. 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 02:11 PM
    • Replies: 6
    • Views: 896
    03-19-2013, 05:55 PM Go to last post
  34. 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 02:17 PM
    time series analysis
    • Replies: 0
    • Views: 511
    03-19-2013, 02:17 PM Go to last post
  35. Analysing ranked answers


    Started by 50footwoman‎, 03-19-2013 08:47 AM
    help neded, psychology, ranks, statistics, telepathy
    • Replies: 0
    • Views: 462
    03-19-2013, 08:47 AM Go to last post
  36. 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 05:21 PM
    little's, mar, mcar, missing value, mnar
    • Replies: 1
    • Views: 5,162
    03-18-2013, 05:27 PM Go to last post
  37. 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 09:16 PM
    • Replies: 4
    • Views: 1,320
    03-17-2013, 10:09 AM Go to last post
  38. 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 11:40 AM
    fit indices, reporting statistics, structural equation model
    • Replies: 3
    • Views: 2,668
    03-15-2013, 03:28 PM Go to last post
  39. 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 07:56 AM
    • Replies: 1
    • Views: 533
    03-15-2013, 09:59 AM Go to last post
  40. 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 07:49 AM
    bonferroni, corrections, multiple comparisons
    • Replies: 1
    • Views: 454
    03-14-2013, 01:31 AM Go to last post
  41. 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 12:21 PM
    analysis, chi square, interval data, likert scale
    • Replies: 1
    • Views: 862
    03-14-2013, 01:23 AM Go to last post
  42. 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 10:52 PM
    • Replies: 4
    • Views: 727
    03-13-2013, 11:44 PM Go to last post
  43. 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 04:01 PM
    cfa, maximum likelihood, normality
    • Replies: 3
    • Views: 4,478
    03-13-2013, 06:35 PM Go to last post
  44. 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 03:03 AM
    clusters, log linear, poisson distribution, survey design
    • Replies: 0
    • Views: 982
    03-12-2013, 03:03 AM Go to last post
  45. 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 07:19 PM
    • Replies: 0
    • Views: 759
    03-11-2013, 07:19 PM Go to last post
  46. 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 12:42 PM
    • Replies: 1
    • Views: 936
    03-10-2013, 02:55 PM Go to last post
  47. 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 09:55 AM
    compare coefficients, compare groups
    • Replies: 0
    • Views: 665
    03-10-2013, 09:55 AM Go to last post
  48. 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 02:58 PM
    • Replies: 2
    • Views: 1,357
    03-08-2013, 03:47 PM Go to last post
  49. 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 09:57 AM
    • Replies: 2
    • Views: 592
    03-08-2013, 10:16 AM Go to last post
  50. 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 07:08 PM
    • Replies: 0
    • Views: 699
    03-06-2013, 07:08 PM Go to last post
  51. 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 06:48 PM
    • Replies: 0
    • Views: 401
    03-06-2013, 06:48 PM Go to last post
  52. 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 05:58 PM
    • Replies: 2
    • Views: 1,253
    03-06-2013, 09:45 AM Go to last post
  53. 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 07:06 AM
    mediation analysis, regression, skewed
    • Replies: 6
    • Views: 10,364
    03-04-2013, 03:12 PM Go to last post
  54. 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 04:18 PM
    • Replies: 0
    • Views: 626
    03-02-2013, 04:18 PM Go to last post
  55. 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 10:12 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 1,285
    02-28-2013, 03:52 PM Go to last post
  56. 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 04:47 PM
    • Replies: 0
    • Views: 427
    02-27-2013, 04:47 PM Go to last post
  57. 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 07:28 PM
    • Replies: 3
    • Views: 2,152
    02-27-2013, 10:59 AM Go to last post
  58. 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 03:26 PM
    • Replies: 2
    • Views: 619
    02-26-2013, 04:52 PM Go to last post
  59. 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 03:33 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 1,905
    02-25-2013, 06:06 PM Go to last post
  60. 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 02:14 PM
    • Replies: 5
    • Views: 5,216
    02-25-2013, 05:48 PM Go to last post

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