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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: 21,942
    11-10-2005, 12:21 AM Go to last post
  1. heterogeneity measures (betwwen-subject variability)

    in a word association test, computing ADOM,NUR,NMR how can I use H statistic to compare distribution of responses of two groups? thanks.

    Started by nikta‎, 10-10-2013 11:05 AM
    • Replies: 0
    • Views: 426
    10-10-2013, 11:05 AM Go to last post
  2. SEM in AMOS, residual errors

    Hello everybody, I need to report on a paper a model tested through SEM analyses in AMOS graphic, In the figure referees asked me to report...

    Started by PsychoSport‎, 10-10-2013 09:16 AM
    amos, residuals, standard error, structural equation model
    • Replies: 0
    • Views: 1,199
    10-10-2013, 09:16 AM Go to last post
  3. Bayesian for dummies

    I saw this blog post: http://vasishth-statistics.blogspot.com/2013/10/new-course-on-bayesian-data-analysis.html And opened the notes on Bayesian...

    Started by trinker‎, 10-09-2013 09:51 AM
    • Replies: 0
    • Views: 783
    10-09-2013, 09:51 AM Go to last post
  4. Re-post: R, pwr: Proper test to determine multi-stage random sample size?

    Hello. Thanks for participating in this forum. I'm here to confirm or revise my plans for a multi-stage sample of an existing data set. ...

    Started by Binip‎, 10-09-2013 12:25 AM
    • Replies: 0
    • Views: 717
    10-09-2013, 12:25 AM Go to last post
  5. Eliminate effects of covariate for each item

    Hi, I hope that somebody can help me with my little stats problem in regard to my memory study. In my study, participants are tested for their...

    Started by Student1111‎, 10-08-2013 03:02 AM
    • Replies: 1
    • Views: 577
    10-08-2013, 09:34 PM Go to last post
  6. Interpreting time invariant covariate - repeated measures

    I conducted a 3 x 2 x 2 x 2 repeated measures ANOVA with 2 time invariant / between subjects covariates (research details below). While covariates...

    Started by RPS‎, 10-04-2013 08:14 PM
    • Replies: 0
    • Views: 1,021
    10-04-2013, 08:14 PM Go to last post
  7. Therapeutic Outcomes for a single group at 3 time points

    Hi, I would be very grateful for some advice because I am getting really confused! I have been collecting outcomes data (3 different...

    Started by AlexdPerry‎, 09-30-2013 07:17 AM
    anova, pre-post, single group, t-test
    • Replies: 1
    • Views: 694
    10-04-2013, 05:51 PM Go to last post
  8. Repeated measures ANOVA : problem with interpretation

    My repeted factor represents an effect of an antipsychotic drug on some quantitative variable measured in 5 time points. When that is the only factor...

    Started by Anchyboom‎, 10-04-2013 05:22 PM
    post hoc, repeated measures
    • Replies: 0
    • Views: 574
    10-04-2013, 05:22 PM Go to last post
  9. Unsure if what I am doing is OK... advice?

    Thanks I actually ended up doing something else. I just had to think things through.

    Started by eyeaye‎, 10-01-2013 04:47 PM
    • Replies: 1
    • Views: 578
    10-01-2013, 05:18 PM Go to last post
  10. post-hoc test after principal coordinate analysis

    Hello, I'm going to explore my dataset, composed by 100 subjects and 14 binary (1,0) variables. I was wondering if my protocol makes sense: ...

    Started by Marco777‎, 09-27-2013 07:30 AM
    binary data, discriminant analisys
    • Replies: 2
    • Views: 702
    09-27-2013, 11:18 AM Go to last post
  11. Three groups two linear regressions

    Hello friends,:wave: I am analyzing data that has three groups (type I treatment - the new treatment, type 2 treatment - is the "regular"...

    Started by Galit‎, 09-27-2013 06:31 AM
    • Replies: 0
    • Views: 471
    09-27-2013, 06:31 AM Go to last post
  12. Post-hoc Power, effect size for Chi-square

    I need help with my post-hoc power analysis, specifically the effect size: I measure children's successrate under four conditions. My dependent...

    Started by a_schaman‎, 09-25-2013 02:13 PM
    chi sq test, cohen's w, cramer's v, effect size, power
    • Replies: 0
    • Views: 1,799
    09-25-2013, 02:13 PM Go to last post
  13. Question About MANOVA (assumptions violated)

    Hi everyone, I am doing a research on demographical factors (e.g. family income, step family, gender etc.) and aggressiveness/delinquency of...

    Started by acchan‎, 09-22-2013 06:13 AM
    • Replies: 5
    • Views: 1,346
    09-24-2013, 03:43 AM Go to last post
  14. Research stats & power analysis

    Hi please could someone help as I am very confused and I'm sure the answer is very straight forwaard. I am doing a study looking at beliefs about...

    Started by Psy86‎, 09-16-2013 08:34 AM
    • Replies: 1
    • Views: 681
    09-24-2013, 02:09 AM Go to last post
  15. [SOLVED] Stats question..Please help!

    Need help with this question ASAP. It is very important. Fiona takes part in two different choice-reaction time tasks as part of her research...

    Started by AmJ‎, 09-23-2013 05:39 AM
    standard, statistics
    • Replies: 1
    • Views: 576
    09-23-2013, 07:12 AM Go to last post
  16. Singular correlation matrix problem

    I'm using principal components to reduce problem dimension. I obtain correlation matrix whose determinant is about 10^(-13) as the result of ...

    Started by kobylkinks‎, 08-04-2008 07:30 AM
    • Replies: 5
    • Views: 14,476
    09-20-2013, 01:46 AM Go to last post
  17. Interaction between two causally related IVs

    I am interested in studying an interaction effect of two variables that have been shown to have a causal relationship by previous research. I am...

    Started by hemivar‎, 09-15-2013 01:48 AM
    • Replies: 2
    • Views: 782
    09-16-2013, 01:13 PM Go to last post
  18. Help! Repeated Measures ANOVA SPSS

    Context of study: 32 participants completed a self-esteem questionnaire (scores can go from 0-40). Then they are scanned in a fMRI so we can see...

    Started by kristall‎, 09-14-2013 12:46 AM
    anova, newbie, repeated measures, spss
    • Replies: 2
    • Views: 1,057
    09-14-2013, 02:09 PM Go to last post
  19. Question about model validation.

    I'm working on a problem on my own (not for class or work) and I just wanted to get some outside opinions before I progress further. As far as my...

    Started by dberma15‎, 09-12-2013 07:14 PM
    bayesian, data analysis, model validation, statistical methods
    • Replies: 0
    • Views: 722
    09-12-2013, 07:14 PM Go to last post
  20. Using T tests in a multimediational model

    I have used Andrew Hayes PROCESS to construct a multimediational model. Does anyone know if it is possible to run T tests to compare the strengths...

    Started by rosenmarsh‎, 09-11-2013 02:32 PM
    • Replies: 0
    • Views: 552
    09-11-2013, 02:32 PM Go to last post
  21. quasi experimental design

    HI, I/\'m doing a thesis on non-compliance in procurement looking at or trying to show that noncompliance is due to psychological and economical...

    Started by Tamzylou‎, 09-07-2013 07:51 AM
    • Replies: 2
    • Views: 679
    09-10-2013, 12:15 PM Go to last post
  22. Exclamation Thesis Statistics - - Outcome Known, but want to categorize Participant responses

    Hi! I am beginning the process of determining which statistical tests to use for my thesis research involving high school dropouts and their...

    Started by abruno‎, 09-09-2013 06:32 PM
    • Replies: 8
    • Views: 1,024
    09-09-2013, 09:21 PM Go to last post
  23. Outcome is Ranking Variable--What is the best test?

    Hi all, I am working with a dataset in which the outcome is a rank or an ordered variable. Essentially, participants are given some information...

    Started by eveisdawning‎, 09-09-2013 03:19 PM
    rank regression, ranks
    • Replies: 1
    • Views: 531
    09-09-2013, 04:17 PM Go to last post
  24. help

    hello im not really sure if im on the right thread but anyways i really need ur help, i am conducting a study about knowledge attitude and practice...

    Started by noobieta‎, 09-06-2013 10:05 AM
    • Replies: 2
    • Views: 641
    09-07-2013, 10:02 AM Go to last post
  25. psi matrix warning--is my cure worse than the malady?

    Hi all- I've been struggling with a psi matrix warning in my multiple indicator growth model for a few weeks. I found a tentative solution this...

    Started by MattH‎, 09-07-2013 08:56 AM
    • Replies: 0
    • Views: 527
    09-07-2013, 08:56 AM Go to last post
  26. Unhappy I need help with Inter-Rater agreement

    I'm developing a scale and my items were already checked by a group of 4 judges. They gave a dichotomica response (yes, leave the item or no,...

    Started by le.peppermint‎, 09-04-2013 07:42 PM
    interrater agreement, interrater reliability
    • Replies: 4
    • Views: 926
    09-06-2013, 10:46 AM Go to last post
  27. Is Mann Whitney test appropriate when N=1?

    Hello everyone, Im working on my phd (psychology), finished collecting data, now dealing with their analysis. I have a question regarding the...

    Started by Gianna‎, 09-02-2013 12:58 PM
    • Replies: 5
    • Views: 918
    09-04-2013, 10:45 AM Go to last post
  28. Ranges in survey questions

    I am working on some survey research. One of the questions is something like... This is how the colleague phrased the question but I know...

    Started by trinker‎, 09-02-2013 11:14 AM
    • Replies: 12
    • Views: 1,427
    09-02-2013, 06:45 PM Go to last post
  29. Paired t-Test: 7 means which do I compare?

    Hi, I've been running research trying to ascertain if retroactive priming is possible facilitated by Extra Sensory Perception. It is based on a...

    Started by cf156‎, 08-31-2013 03:29 PM
    • Replies: 0
    • Views: 701
    08-31-2013, 03:29 PM Go to last post
  30. Comparing two tests

    I was hoping someone could give me some advice on a stats homework assignment. Most of it is pretty easy but the last question (even though its...

    Started by balanar‎, 08-30-2013 10:24 AM
    • Replies: 0
    • Views: 542
    08-30-2013, 10:24 AM Go to last post
  31. Do I have a Type 1 or Type 2 error here?

    Ok, so.. I am testing the effectiveness of an intervention on work outcome variables, using MANOVAs. For one of my MANOVAs I have a significant...

    Started by Lolly‎, 08-27-2013 09:14 AM
    • Replies: 8
    • Views: 967
    08-28-2013, 04:51 PM Go to last post
  32. Testing Group Equivalence

    Hi, I am doing an intervention study for my thesis. I need to check that the control groups and experimental groups are equal at the outset on...

    Started by Lolly‎, 08-26-2013 06:35 PM
    • Replies: 3
    • Views: 693
    08-28-2013, 04:40 PM Go to last post
  33. Help with comparing stanines across groups

    I am trying to put together some stats on a simple questionnaire (10 items) administered to approx 200 respondents from 5 different organisations....

    Started by PeterGi‎, 08-20-2013 10:01 PM
    • Replies: 1
    • Views: 639
    08-28-2013, 10:01 AM Go to last post
  34. Choosing Scales and determing if difference between questions are significant

    Hi I'm pilot testing a survey on innovation. Survey objective is to find out whether the factors affecting innovation are present in a specific work...

    Started by cookydough‎, 08-02-2013 03:29 AM
    • Replies: 2
    • Views: 627
    08-28-2013, 02:18 AM Go to last post
  35. data transformation- varied result using log10- better method?

    To transform or not to transform and how to transform data? Hi, My study: - 2 groups- 1. Not allowed to work; 2. Allowed to work (control) -...

    Started by psy_vm‎, 08-26-2013 02:21 PM
    data transformation, normal distribution, psychology statistics, spss
    • Replies: 2
    • Views: 1,196
    08-27-2013, 04:42 PM Go to last post
  36. Quick question: When running an Independent Samples MANOVA...

    Where are the univariate output tables?!! I cant see any in SPSS (I am using Syntax). I had univariate outputs for my mixed MANOVAs, but I have...

    Started by Lolly‎, 08-26-2013 06:46 PM
    • Replies: 7
    • Views: 721
    08-27-2013, 09:07 AM Go to last post
  37. Chi Square Expected Count less than 5!

    Hi there, any help needed with my problem would be MUCH appreciated. I have a 2x7 design. Gender VS different treatment options. I did a...

    Started by statshelpneeded‎, 08-26-2013 12:14 PM
    • Replies: 6
    • Views: 7,596
    08-27-2013, 02:28 AM Go to last post
  38. need help with sample size

    Hi all-How do I calculate sample size for a one group repeated measures? I want to know how many subjects I need for a study looking at whether a...

    Started by norajones‎, 08-27-2013 02:01 AM
    • Replies: 0
    • Views: 528
    08-27-2013, 02:01 AM Go to last post
  39. Help needed with analyzing sensitivity to changes in Musical sounds

    Thank you so much for your advice in advance, I owe you a pint if you are in London! :) I am trying to analyze whether kids with autism are more...

    Started by icsgreen‎, 08-26-2013 11:18 AM
    change detection, music, perception, psychology, statistics
    • Replies: 1
    • Views: 483
    08-26-2013, 12:58 PM Go to last post
  40. Type I and type II errors in multiple factor ANOVA

    Hello, I wonder if someone can explain to me what happens with type I and type II errors as you add more factors to ANOVA design, specifically to...

    Started by dangor‎, 08-26-2013 09:17 AM
    anova, multivariate analysis, type 2 errors, type i error
    • Replies: 0
    • Views: 630
    08-26-2013, 09:17 AM Go to last post
  41. The importance of 'breaching zero' in a bootstrapping mediation Analysis

    Dear all, I am using mediation analaysis as part of my research and I am bit confused about the idea of 'breaching zero' in the confidence...

    Started by kaz‎, 08-25-2013 11:34 AM
    • Replies: 2
    • Views: 939
    08-25-2013, 12:22 PM Go to last post
  42. Exclamation is it possible to convert a pass or fail data into quantifiable data for thesis?

    our thesis is about personality factors affecting performance. and their performance is evaluated to either pass or fail only since its for a...

    Started by mikeecomendador‎, 08-11-2013 12:55 PM
    psychology, statistics, thesis
    • Replies: 9
    • Views: 1,593
    08-24-2013, 11:29 AM Go to last post
  43. T-test vs nonparametric for likert scale (very small sample size)

    Hi everyone, I'm in the process of completing my masters thesis, and while I did my share of psych stats in my undergrad it's been YEARS and I'm a...

    Started by romy‎, 08-24-2013 07:02 AM
    likert scale, nonparametric, parametric, small sample size
    • Replies: 1
    • Views: 867
    08-24-2013, 11:00 AM Go to last post
  44. how to calculate for unbalanced panel data Lagrange-multiplier test

    Hi, I have unbalanced panel data. Using SAS, the null hypthesis of Hausman Test was not rejected (means the random effects model is better than...

    Started by tantan‎, 04-24-2010 11:37 AM
    • Replies: 2
    • Views: 3,123
    08-23-2013, 01:00 PM Go to last post
  45. Smile Data transformation

    Hi all, I have used Fraley's ECR-RS with two subscales, one on attachment-related anxiety and the other on attachment-related avoidance to collect...

    Started by Brownie‎, 08-22-2013 02:46 AM
    • Replies: 3
    • Views: 1,058
    08-22-2013, 07:40 PM Go to last post
  46. Question Urgently need help with data analysis

    Hey folks, i really am desperate for help with this, since I have to present my results at a conference in less than two weeks. I am a...

    Started by Comfort Eagle‎, 08-21-2013 11:10 AM
    correlation, multiple regression, small sample size
    • Replies: 6
    • Views: 1,026
    08-22-2013, 10:42 AM Go to last post
  47. ANOVA question.. no interaction but significant main effect

    Okay.. here it goes.. i have two variables (A and B). A has 4 levels (A1,A2,A3,A4) B has 6 levels (B1, B2, B3, B4, B5, B6) In order to answer my...

    Started by chocolatesummer‎, 08-20-2013 05:56 PM
    • Replies: 2
    • Views: 821
    08-20-2013, 06:26 PM Go to last post
  48. Question nonparametric tests to check the effect of independent variable on dependent variable

    hi im hoping that some one might help me. i want to check the effect of metacognitive skills (MCS) on students presentation and report writing...

    Started by gksiddiqui‎, 08-18-2013 04:22 PM
    • Replies: 2
    • Views: 885
    08-18-2013, 06:25 PM Go to last post
  49. My supervisor got mad. I need help!

    She read a draft of my results and I have a million and one things to correct. I am running mixed MANOVAs on my intervention study data. But...

    Started by Lolly‎, 08-15-2013 05:58 PM
    • Replies: 11
    • Views: 1,381
    08-18-2013, 02:41 PM Go to last post
  50. Repeated Measures ANOVA : Intervention and control group problem

    Hi everyone, this is my first post and like many others I am a master student writing my thesis. I ran an experiment to test the impact of left...

    Started by Melkor‎, 08-17-2013 03:18 PM
    • Replies: 1
    • Views: 1,181
    08-18-2013, 12:40 PM Go to last post
  51. Likert scale with categories - chart to illustrate results

    Ho there, I am currently analyzing a Likert scale questionnaire (5 points) of 28 items. The items of the questionnaire are grouped into several...

    Started by frederiquef‎, 08-18-2013 04:30 AM
    likert chart
    • Replies: 0
    • Views: 872
    08-18-2013, 04:30 AM Go to last post
  52. ANOVA and regression - "the same thing" but different sample size requirements?

    It is often said that ANOVA and regression are the same thing, and indeed the results are equivalent in the cases I've encountered thus far. So I...

    Started by noise‎, 08-16-2013 08:18 AM
    • Replies: 1
    • Views: 740
    08-16-2013, 08:39 AM Go to last post
  53. Reporting statistics in results section

    Hi, I'm writing the results section for an undergraduate report, and to my surprise, I haven't been able to find an answer to this ridiculously...

    Started by Phoenix91‎, 08-15-2013 10:46 PM
    • Replies: 4
    • Views: 745
    08-16-2013, 04:51 AM Go to last post
  54. MANOVA output- What does this mean?

    As I forgot to ask my supervisor yesterday. I have run a MANOVA on two DVs, and in the Multivariate Tests table it says that the main effects of...

    Started by Lolly‎, 08-06-2013 10:29 AM
    manova
    • Replies: 3
    • Views: 1,050
    08-15-2013, 05:53 PM Go to last post
  55. nonparametric test for group differences?

    Hello, I have a simple question. I am not too familiar with nonparametric tests. I want to see if there are group differences in book selection....

    Started by lauralee‎, 08-15-2013 02:22 AM
    • Replies: 1
    • Views: 514
    08-15-2013, 05:58 AM Go to last post
  56. Testing difference between correlations using fishers exact test?

    Hello everyone, I have a sample n= 92 where I am looking for relationships between characteristics (age, gender, religiosity, education) attitudes...

    Started by RachelH‎, 08-14-2013 02:26 PM
    • Replies: 0
    • Views: 672
    08-14-2013, 02:26 PM Go to last post
  57. a method for calculating the proportional mediating effect

    Dear All Hi I am Amir from Iran where we have no a well know psychologist especially in quantitative.I am not good in mediation. I used Preacher...

    Started by amirpakpour‎, 08-14-2013 09:34 AM
    mediating effect, mediation, r-squared
    • Replies: 0
    • Views: 775
    08-14-2013, 09:34 AM Go to last post
  58. Standard Multiple Regression AND APA format write-up

    Hi all, I was just wondering if anyone knew the correct APA format to write up the results of a standard multiple regression ran in SPSS. I have...

    Started by MPsy‎, 08-14-2013 04:47 AM
    apa 6th ed., spss, write ups
    • Replies: 0
    • Views: 1,827
    08-14-2013, 04:47 AM Go to last post
  59. Statistical tests for a research study

    Dear All, Firstly, I am an absolute novice with respect to quantitative statistical analysis and I need a little guidance and all help would be...

    Started by mjm93‎, 07-30-2013 05:55 AM
    • Replies: 2
    • Views: 1,102
    08-13-2013, 03:08 PM Go to last post
  60. What correlation should I run?

    I have two data sets from identical ordinal scales (Never, Rarely, Occasionally, Often, Very Often). What correlation should I run?

    Started by sonishell‎, 08-13-2013 10:29 AM
    correlation, ordinal
    • Replies: 4
    • Views: 805
    08-13-2013, 01:05 PM Go to last post

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