1. 10-14-2010
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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: 21,875
    11-10-2005, 12:21 AM Go to last post
  1. Face validity VS Content Validity

    Dear respected members, I'm developing an instrument to measure care dependency in home dwelling elderly. I want to test the validity of the...

    Started by febriana_zz‎, 04-21-2013 02:17 AM
    content validity, face validity, interpretability
    • Replies: 0
    • Views: 1,586
    04-21-2013, 02:17 AM Go to last post
  2. Missing Data

    Hi :wave:, I have a database that I am using data imputation techniques, but is not a normal matrix to apply a multivariate normal test, my question...

    Started by adejota‎, 04-20-2013 06:41 PM
    little's, missing data analysis, missing data imputation
    • Replies: 0
    • Views: 709
    04-20-2013, 06:41 PM Go to last post
  3. mean or median for reaction times?

    Hi all, I have two groups who made a simple detection task in which reaction times was the only dependent variable (observed in different...

    Started by .elena.‎, 04-19-2013 05:04 AM
    • Replies: 2
    • Views: 2,132
    04-19-2013, 10:03 AM Go to last post
  4. finding the effect of X on the relationship between Y and Z

    I had a huge explanation and it got deleted, so here's a briefer version: I'm trying to find whether high trait empathy predicts a greater effect...

    Started by cairoan‎, 04-18-2013 08:00 PM
    correlation, problem, regression, science
    • Replies: 0
    • Views: 656
    04-18-2013, 08:00 PM Go to last post
  5. Research methods - Comparing high and low risk sports

    I am currently conducting a piece of research that aims to find if there is a difference between personality traits between participants of high and...

    Started by dannydoy‎, 04-18-2013 01:37 PM
    • Replies: 2
    • Views: 681
    04-18-2013, 01:59 PM Go to last post
  6. Help with which type of ANOVA to use?!

    Hello, I'm trying to figure out which type of ANOVA I'd use in this situation. My question involves 3 different groups with measurements taken at...

    Started by amycardinal‎, 04-13-2013 08:49 PM
    anova, help needed, repeated measures
    • Replies: 2
    • Views: 701
    04-18-2013, 12:51 PM Go to last post
  7. How do you report Effect sizes for ANCOVA?

    For ANOVA effect sizes you report n2 (in the correct format) but what do you do for effect sizes of ANCOVA? is it n2, r or r2??? Please HELP!

    Started by emmaPex‎, 04-18-2013 10:11 AM
    • Replies: 1
    • Views: 1,147
    04-18-2013, 10:22 AM Go to last post
  8. What should I do with this data?

    Hello, I am a work psychologist and have been asked to evaluate some data as part of my job. I rarely get the opportunity to do something like...

    Started by Psychobabblist‎, 04-17-2013 01:21 PM
    • Replies: 1
    • Views: 613
    04-18-2013, 03:33 AM Go to last post
  9. Awful Design - how to handle it ?

    Dear all, I have data from an experiment with what I think is an awful design. I need to type it into Excel (or directly into a statistical...

    Started by Yankel‎, 04-15-2013 07:59 AM
    • Replies: 8
    • Views: 919
    04-17-2013, 01:18 AM Go to last post
  10. combining two scales with different number of items into one measurement

    Hi, I have two different scales that measure children's' exposure to family violence. One is based on children's report on a single item, the other...

    Started by shiradvir‎, 04-16-2013 06:38 AM
    • Replies: 5
    • Views: 1,663
    04-16-2013, 09:45 AM Go to last post
  11. Maximum Likelihood Estimation, Ordered Logit

    Just a quick question, which might or might not be interesting. If attempting to estimate paramaters of a multinominal logit model by maximum...

    Started by tahslacks‎, 04-16-2013 06:20 AM
    • Replies: 0
    • Views: 724
    04-16-2013, 06:20 AM Go to last post
  12. Exclamation Multiple Linear Regression

    Hi all, Any help on this question would mean the absolute world to me. I have been in the emergency room with my boyfriend for the past 56 hours...

    Started by woodenspoon‎, 04-15-2013 04:40 AM
    • Replies: 3
    • Views: 1,093
    04-15-2013, 07:57 AM Go to last post
  13. Relative size of a p-value for a second hypothesis, compared to the first.

    Hi all, I apologise in advance if this is a very easy question - I may be struggling with the wording, or I might just be a bit slow. The...

    Started by hopeless.at.statistics‎, 04-14-2013 01:43 AM
    correlation, hypothesis test, relative size
    • Replies: 0
    • Views: 772
    04-14-2013, 01:43 AM Go to last post
  14. Likert scale, parametric or nonparametric?

    Hello, first post here. I apologize if it is a stupid question (but then again, that'll make it easier to answer:)) I am training to be a...

    Started by 11jono11‎, 12-11-2010 10:02 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 16,741
    04-13-2013, 07:43 PM Go to last post
  15. to use parametric or non-parapetric

    Hi Everyone, If anybody could help or offer any suggestions I would be extremely grateful for my Thesis I am looking at the relationship between...

    Started by 182BECKY‎, 04-13-2013 12:31 PM
    • Replies: 0
    • Views: 595
    04-13-2013, 12:31 PM Go to last post
  16. 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: 898
    04-12-2013, 06:20 AM Go to last post
  17. 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: 4,412
    04-11-2013, 02:11 PM Go to last post
  18. 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: 975
    04-11-2013, 07:01 AM Go to last post
  19. 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: 1,336
    04-09-2013, 08:58 PM Go to last post
  20. 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: 673
    04-09-2013, 09:04 AM Go to last post
  21. 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: 1,087
    04-09-2013, 05:59 AM Go to last post
  22. 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: 1,036
    04-08-2013, 09:16 AM Go to last post
  23. 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: 551
    04-08-2013, 09:14 AM Go to last post
  24. 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: 622
    04-06-2013, 10:55 PM Go to last post
  25. 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: 1,297
    04-05-2013, 10:33 PM Go to last post
  26. 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: 1,302
    04-05-2013, 10:33 AM Go to last post
  27. 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: 1,439
    04-05-2013, 09:33 AM Go to last post
  28. 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: 2,922
    04-04-2013, 09:16 PM Go to last post
  29. 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: 664
    04-04-2013, 08:37 AM Go to last post
  30. 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: 659
    04-04-2013, 06:27 AM Go to last post
  31. 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: 665
    04-03-2013, 09:30 PM Go to last post
  32. 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: 561
    04-03-2013, 08:06 AM Go to last post
  33. 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: 826
    04-03-2013, 01:22 AM Go to last post
  34. 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: 582
    04-01-2013, 06:32 PM Go to last post
  35. 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: 926
    04-01-2013, 12:48 PM Go to last post
  36. 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: 20,185
    03-31-2013, 10:55 PM Go to last post
  37. 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: 714
    03-31-2013, 06:23 PM Go to last post
  38. 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: 523
    03-27-2013, 05:58 PM Go to last post
  39. 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: 490
    03-27-2013, 09:47 AM Go to last post
  40. 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: 553
    03-25-2013, 02:50 PM Go to last post
  41. 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: 1,283
    03-25-2013, 11:44 AM Go to last post
  42. [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: 507
    03-24-2013, 10:34 AM Go to last post
  43. 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: 493
    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: 614
    03-22-2013, 02:38 PM Go to last post
  45. 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: 1,082
    03-21-2013, 04:13 AM Go to last post
  46. 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: 412
    03-20-2013, 04:26 PM Go to last post
  47. 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: 1,983
    03-20-2013, 11:47 AM Go to last post
  48. 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: 927
    03-19-2013, 05:55 PM Go to last post
  49. 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: 539
    03-19-2013, 02:17 PM Go to last post
  50. Analysing ranked answers


    Started by 50footwoman‎, 03-19-2013 08:47 AM
    help neded, psychology, ranks, statistics, telepathy
    • Replies: 0
    • Views: 489
    03-19-2013, 08:47 AM Go to last post
  51. 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: 5,379
    03-18-2013, 05:27 PM Go to last post
  52. 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: 1,406
    03-17-2013, 10:09 AM Go to last post
  53. 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: 2,834
    03-15-2013, 03:28 PM Go to last post
  54. 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: 568
    03-15-2013, 09:59 AM Go to last post
  55. 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: 467
    03-14-2013, 01:31 AM Go to last post
  56. 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: 883
    03-14-2013, 01:23 AM Go to last post
  57. 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: 749
    03-13-2013, 11:44 PM Go to last post
  58. 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: 4,662
    03-13-2013, 06:35 PM Go to last post
  59. 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: 1,059
    03-12-2013, 03:03 AM Go to last post
  60. 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: 773
    03-11-2013, 07:19 PM Go to last post

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