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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: 22,776
    11-09-2005, 11:21 PM Go to last post
  1. Lack of homogeneity of Variance in two-way ANOVA

    Hi, I am currently analyzing my data in SPSS. Since I am testing the effect of two independent variables on a dependent one, I was planning on...

    Started by Klaro26‎, Yesterday 07:56 AM
    homogeneity, levene's, significance, spss anova
    • Replies: 1
    • Views: 117
    Today, 12:58 AM Go to last post
  2. Interpreting my data (bias?)

    Hello everyone! I had participants learn items from a list and afterwards do a recognition test on them. (EXPERIMENTAL GROUP) the same...

    Started by laraa‎, 03-24-2017 11:47 AM
    • Replies: 0
    • Views: 204
    03-24-2017, 11:47 AM Go to last post
  3. Correct way of reporting Chi square with IV 4 levels results

    Sorry, if the question is silly. Cannot find anywhere what will be a correct way of reporting Chi Square results for the case when IV has 4 levels (4...

    Started by Liliana‎, 03-23-2017 07:28 AM
    • Replies: 4
    • Views: 221
    03-23-2017, 10:02 PM Go to last post
  4. Signal Detection Theory - Calculating d'

    Hi there. I'm currently doing the analysis for my undergraduate study, and I'm wondering if someone could help me with Signal Detection Theory,...

    Started by iwsmuir105‎, 03-23-2017 10:56 AM
    • Replies: 3
    • Views: 153
    03-23-2017, 12:43 PM Go to last post
  5. Need help in Polynomial Regression : constant value and control variables

    Solved. Please remove thank you : )

    Started by angelove114‎, 03-22-2017 11:50 PM
    • Replies: 0
    • Views: 88
    03-22-2017, 11:50 PM Go to last post
  6. Which post-hoc test for a One way repeated measures ANOVA

    Can I use a Tukey test to test all pairwise comparisons for a repeated measures design? :) THANKS

    Started by rachel_joke‎, 03-22-2017 06:03 AM
    • Replies: 3
    • Views: 161
    03-22-2017, 10:45 PM Go to last post
  7. How to organize Multilevel Model in R

    Hello, I am currently running an experiment where we measure escape latency and seeing if the presence of a drug has an effect on this. Each rat...

    Started by atamalu‎, 03-22-2017 10:40 PM
    • Replies: 0
    • Views: 79
    03-22-2017, 10:40 PM Go to last post
  8. Two-way MANOVA

    Hi, how do I fully follow up this MANOVA, please??? 2 IVs: Exposure Therapy (2 levels: control, or virtual reality) and Medication (2 levels:...

    Started by Quickquez‎, 03-22-2017 04:02 PM
    follow-up, manova, two-way
    • Replies: 0
    • Views: 78
    03-22-2017, 04:02 PM Go to last post
  9. Which ANOVA to use

    I have 20 subjects who are all presented with 12 pictures. These 12 pictures are split into 4 categories: Big Inanimate, Big Animate, Small...

    Started by rachel_joke‎, 03-21-2017 01:29 PM
    • Replies: 2
    • Views: 145
    03-22-2017, 06:04 AM Go to last post
  10. Help finding a term used in validity - psychometric testing

    A colleague has asked me for help with the name of a recognised situation whereby truncated information (e.g. a short questionnaire) is used to...

    Started by VBee‎, 03-15-2017 10:04 AM
    • Replies: 10
    • Views: 452
    03-22-2017, 04:22 AM Go to last post
  11. Likert scale data -can I use paired t-test? What about normality testing?

    Hey all! I have read many contradicting manuals and advice, so I decided to ask the best experts –you guys :) I have data from 40 subjects. I...

    Started by Labestia‎, 03-16-2017 01:10 PM
    likert, likert scale, normality, t test
    • Replies: 6
    • Views: 367
    03-19-2017, 05:19 PM Go to last post
  12. Interaction follow-ups

    Hi! I have ran a 2x2x2 ANOVA (B-W-W). There was no 3-way interaction, but there was a 2-way interaction for my 2 within-subjects factors. I'm a...

    Started by fffrost‎, 03-19-2017 09:47 AM
    • Replies: 0
    • Views: 136
    03-19-2017, 09:47 AM Go to last post
  13. MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV) (both n=...

    Started by K_T‎, 03-17-2017 01:25 PM
    assumptions, heterogeneity, mancova, manova, regression slopes
    • Replies: 0
    • Views: 103
    03-17-2017, 01:25 PM Go to last post
  14. Smile MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several Likert scale type questions: DV) for refugees (n=100) and...

    Started by K_T‎, 03-17-2017 12:11 PM
    assumptions, heterogeneity, mancova, manova, regression slopes
    • Replies: 0
    • Views: 45
    03-17-2017, 12:11 PM Go to last post
  15. What are the limitations to feeling thermometers?

    Hi there, I received the following comment from a reviewer and am a bit stuck on how I should answer: The comment is referring to our use...

    Started by jm2209‎, 03-16-2017 03:18 PM
    • Replies: 2
    • Views: 160
    03-16-2017, 03:52 PM Go to last post
  16. Green's scaling analysis of 3 items

    I'm doing a study on helping behaviour in toddlers, trying to see if the three forms of helping I've measured are scalable. I'm using Green's...

    Started by JessR‎, 03-14-2017 09:03 PM
    • Replies: 0
    • Views: 135
    03-14-2017, 09:03 PM Go to last post
  17. Does it make sense to conduct a Hierarchical Principal Compomnent Analysis (PCA)?

    So I have twelve variables that theoretically belong to the same dimension and I want do reduce them to one single item. A hierarchical factor...

    Started by favoone‎, 03-07-2017 11:24 AM
    factor analysis, hierarchical method, principal component
    • Replies: 1
    • Views: 300
    03-13-2017, 08:56 AM Go to last post
  18. Which test to use?

    I have to analyze a within-subject experiment with a continuous dependent variable and a categorical dependent variable (brain stimulation: Anode,...

    Started by mathieu‎, 03-10-2017 09:36 AM
    ancova, anova, covariate
    • Replies: 1
    • Views: 196
    03-13-2017, 08:53 AM Go to last post
  19. Assumptions of Bonferroni correction

    Hi everyone, I recently learned that the Bonferroni correction assumes that all of the hypothesis tests we're conducting on the same data are...

    Started by myautumn28‎, 03-10-2017 04:18 PM
    • Replies: 3
    • Views: 290
    03-13-2017, 08:52 AM Go to last post
  20. how to calculate ICC for sample of 10 with two assessor

    i have two assessors rating on picture cue . SME rateds each stories respective to picture in TAT like test with rating on likert 5 point scale from...

    Started by Dr.A.Suresh‎, 03-13-2017 02:22 AM
    icc for sample (n=10)
    • Replies: 1
    • Views: 165
    03-13-2017, 08:49 AM Go to last post
  21. Simple Mediation Model - output using Mplus

    Hi, Can someone help me interpret my output from Mplus 7 please? The model is simple i.v = x1a mediator = M dv = Y1 I have attached the...

    Started by laula‎, 03-10-2017 02:42 PM
    • Replies: 0
    • Views: 154
    03-10-2017, 02:42 PM Go to last post
  22. Statistical analysis

    Hi there I'm a student doing a dissertation about the influence of reward satisfaction on turnover intention. At the moment I'm wondering how to...

    Started by Hypnoz‎, 02-05-2017 01:29 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 1,311
    03-09-2017, 11:18 AM Go to last post
  23. Cohen's Kappa on Categorical Data in R - Gestural Repertoires

    Hi There, First time user here. I am a Master's student of Primatology, I wasn't sure Psychology Stats was the way to go but it seems to fit...

    Started by KayBaby555‎, 03-08-2017 03:44 AM
    • Replies: 0
    • Views: 211
    03-08-2017, 03:44 AM Go to last post
  24. How should I analyse this data?

    Hello! I've been banging my head against the wall trying to work out the best way of looking at this data. I think I'm missing something simple,...

    Started by Sin_Nie‎, 02-21-2017 10:10 AM
    • Replies: 6
    • Views: 508
    03-07-2017, 04:37 AM Go to last post
  25. Smile Which inferential stats test to use? PLEASE HELP

    Hello all, Someone please help. I'm conducting a study on how group gender ratios influences stereotype threat within career choices and level of...

    Started by ashleymichelle‎, 03-02-2017 08:45 AM
    anova, ordinal, psychology, regression analysis
    • Replies: 11
    • Views: 424
    03-06-2017, 11:40 AM Go to last post
  26. Quick Cronbach's Alpha Question

    Hi all, This may seem like a silly question, but I was wondering if I should remove outliers prior to running reliability analysis or run the...

    Started by Aegislash‎, 02-27-2017 04:32 AM
    cronbach's alpha, outliers, reliability
    • Replies: 14
    • Views: 720
    03-03-2017, 01:16 AM Go to last post
  27. pre post design - analysis help

    Hi everyone, I'm analyzing some data for a research project and need some help selecting the appropriate test that will answer my questions of...

    Started by xmorphicx‎, 03-02-2017 08:33 PM
    • Replies: 0
    • Views: 237
    03-02-2017, 08:33 PM Go to last post
  28. Help Please

    A local United Way and a group of community agencies in a large urban area have decided that making sure young children are ready to enter the school...

    Started by Ktina‎, 02-27-2017 07:30 PM
    • Replies: 0
    • Views: 342
    02-27-2017, 07:30 PM Go to last post
  29. Which test to run?

    I have been getting conflicting results from a few people on what test to use, so please let me know what you think. The design: We have 3...

    Started by atamalu‎, 02-14-2017 06:51 PM
    2 Pages
    1 2
    • Replies: 26
    • Views: 1,166
    02-25-2017, 03:40 PM Go to last post
  30. Test for assessing if gender, organisation, management level and age have an impact

    Hi, I am looking to carry out a multiple regression analysis to assess the factors that predict participant's post-training scores on the...

    Started by EmmaL‎, 02-19-2017 05:28 AM
    • Replies: 10
    • Views: 528
    02-23-2017, 10:29 PM Go to last post
  31. reversed, inverted items... MANOVA

    Do I necessarily need to recode my inverted (negatively worded) items before running a MANOVA? I am running the MANOVA on all items of a...

    Started by T.H.‎, 02-23-2017 06:30 AM
    likert scale, manova, negative wording, recode, reversed items
    • Replies: 0
    • Views: 239
    02-23-2017, 06:30 AM Go to last post
  32. mixing within trial, and between trial effects?

    Hi I'm hoping someone can suggest to this stats dunce an elegant way to analyse the following data. We make a recording from a neuron and apply a...

    Started by ar123‎, 02-22-2017 11:52 AM
    • Replies: 0
    • Views: 215
    02-22-2017, 11:52 AM Go to last post
  33. Inferential results interpretation? Please help

    two players number of games attended per player. t(66)= -3.09, p < .05 d = .35 What does this mean?

    Started by Deanabrown36‎, 02-15-2017 11:21 PM
    • Replies: 2
    • Views: 347
    02-16-2017, 07:56 AM Go to last post
  34. How to conduct a mixed-model analysis in SPSS?

    Hi! I am trying to conduct the following analysis on human subjects data using SPSS. It is my understanding that it requires mixed modeling, and I...

    Started by genericity‎, 02-07-2017 12:24 PM
    • Replies: 1
    • Views: 429
    02-14-2017, 12:26 PM Go to last post
  35. Inter rater agreement - Mezzich's Kappa

    Dear all, I want to assess the quality of the categorization handbook and the accordance between multiple raters who have categorized articles...

    Started by AnnaCop‎, 02-09-2017 08:27 AM
    • Replies: 0
    • Views: 381
    02-09-2017, 08:27 AM Go to last post
  36. general correlation question

    hello! if variable A is correlated to var B (.37) and var B is correlated to var C (.32), can we infer the correlation between var A and var C?...

    Started by mdc333‎, 02-07-2017 03:23 PM
    correlation
    • Replies: 7
    • Views: 521
    02-07-2017, 10:28 PM Go to last post
  37. Unhappy Statistical analysis, where to start with 2600 participants?

    1. purpose of the study / research question / hypotheses, if possible, provide some background or context for us. I'm looking at the dark triad...

    Started by triad‎, 02-06-2017 03:24 PM
    • Replies: 3
    • Views: 454
    02-06-2017, 08:26 PM Go to last post
  38. Very Quick Mediation question

    I want to know if the direct effect of X on Y is significant, whether it is still possible for X to be mediated through M? Thanks a million

    Started by pr15371‎, 02-05-2017 09:54 AM
    • Replies: 2
    • Views: 421
    02-06-2017, 11:34 AM Go to last post
  39. Sample size calculation for a one way anova (three conditions)??

    Hi there, I am designing a study that compares three conditions (differences in glass shape) on one main DV (drinking rate) (as well as some...

    Started by tirl2‎, 01-26-2017 08:13 AM
    effect size, one way anova, power calculation, sample size calculation, sample size determination
    • Replies: 0
    • Views: 710
    01-26-2017, 08:13 AM Go to last post
  40. Raykov's rho

    In relation to Raykov's rho, this might be a naive question but, is appropriate to report it as a consistency index in a multifactorial solution? I...

    Started by ernesthor‎, 01-18-2017 01:27 AM
    • Replies: 1
    • Views: 467
    01-25-2017, 04:38 PM Go to last post
  41. Help responding to a journal reviewer on reliability of scale

    Hey all, My team has been working on a paper that looks at the psychometric properties of an 8-item scale. This scale has items that we pulled...

    Started by jdark7‎, 01-21-2017 01:59 PM
    • Replies: 4
    • Views: 698
    01-25-2017, 01:18 AM Go to last post
  42. Repeated measures analysis with ordinal data

    Hello, I have data on subjects' ratings of 5 potential side effects (rated as: none, mild, moderate, considerable, strong) following three...

    Started by Siobh‎, 01-14-2017 11:01 AM
    intervention, likert-type scale, repeated measures, within-subjects
    • Replies: 1
    • Views: 686
    01-19-2017, 07:35 AM Go to last post
  43. Construction und reliability of scales

    Hello, I'm checking a moderated mediation with two mediators (altruism & egoism). I've constructed two scales (altruismus with 8 items and egoism...

    Started by yologer‎, 08-07-2016 06:06 AM
    • Replies: 1
    • Views: 715
    01-18-2017, 01:51 AM Go to last post
  44. Repeated Measures Anova question

    Thanks so much for taking a minute to read this! I am planning a dissertation and IF could get some feedback as to if I am on the right track,...

    Started by sr1226‎, 01-14-2017 10:02 AM
    anova, nominal data analysis, repeated measures anova, within subjects
    • Replies: 1
    • Views: 576
    01-16-2017, 11:36 AM Go to last post
  45. Exploratory factor analysis with forced number of factors?

    Dear colleagues, SPSS has an option for exploratory factor analysis where you can choose the number of factors before performing the analysis. In...

    Started by Anthony_1000‎, 01-11-2017 02:02 AM
    • Replies: 3
    • Views: 647
    01-13-2017, 11:32 AM Go to last post
  46. Compare differences between exp. and contr. of two groups

    Hi! I already used lots of search engines without finding an answer to my problem. I am testing two methods for manipulating religious belief....

    Started by rothmann1510‎, 01-10-2017 07:20 AM
    anova, interaction, interaction effects, two factor anova, two factors
    • Replies: 5
    • Views: 646
    01-12-2017, 02:45 AM Go to last post
  47. [SPSS-ANOVA] Should I use a mixed ANOVA design?

    Good evening I am writing to inquire how I should tackle the data for my dissertation research paper. I have two main problems that I will point...

    Started by AnaC‎, 01-08-2017 01:34 PM
    anova, theory of mind
    • Replies: 1
    • Views: 571
    01-09-2017, 02:41 AM Go to last post
  48. Interactions in count data

    Hi all, I've run a multi-tasking behavioural paradigm with volunteers grouped according to 2 characteristics 1) Age (young, mid) 2) Risk (high,...

    Started by Lancaster‎, 01-05-2017 04:35 AM
    • Replies: 0
    • Views: 556
    01-05-2017, 04:35 AM Go to last post
  49. Statistical analysis

    Hi all. I am doing an experiment that looking at relationships between mental imagery and mental disorders, mental disorders and self-regulation...

    Started by Armaghgeddon‎, 01-04-2017 10:40 AM
    • Replies: 2
    • Views: 586
    01-04-2017, 01:10 PM Go to last post
  50. Exploratory factor analysis on grades

    Hi! I'm doing an analysis on a set of 90 test results in 7 different tasks (90 students were given a set of 7 tasks). The results were not given...

    Started by Danrob‎, 01-02-2017 02:28 AM
    • Replies: 0
    • Views: 546
    01-02-2017, 02:28 AM Go to last post
  51. Second language acquisition data analysis

    Hi there, I am writing a research paper about second language acquisition and I would like to confirm my data analysis approach since I am not an...

    Started by bgarcia‎, 01-01-2017 07:33 AM
    • Replies: 0
    • Views: 514
    01-01-2017, 07:33 AM Go to last post
  52. Factor analysis on dichotomously scored items

    Hi have a set of 30 dichotomously scored items (scored 0 and 1) and want to do exploratory factor analysis on them. I have heard that performing EFA...

    Started by Anthony_1000‎, 12-29-2016 10:14 AM
    • Replies: 4
    • Views: 825
    12-31-2016, 12:58 PM Go to last post
  53. Calculating and Reporting Effect Size for Fisher's Exact Test?

    Hi everyone, I am writing a paper for publication. This is my first time doing a survey study, and also my first time working with categorical...

    Started by nporot‎, 12-28-2016 12:42 PM
    effect size, fisher's exact test, odds ratios, phi
    • Replies: 2
    • Views: 864
    12-30-2016, 10:35 AM Go to last post
  54. Does this study design look okay? Thanks :)

    I want to look at: If a school-based CBT intervention has an impact on young people's levels of anxiety and/or depression. I have questionnaires...

    Started by cmms‎, 12-28-2016 05:15 PM
    • Replies: 3
    • Views: 755
    12-29-2016, 05:04 PM Go to last post
  55. Nested within-subjects repeated measures stats?

    Hi people, I am having some confusion over how to carry out the stats for my experiment. In the experiment, there is two condition of teaching...

    Started by sgjustino‎, 12-19-2016 08:41 AM
    linear mixed model, nested, repeated measure, within subject
    • Replies: 2
    • Views: 863
    12-26-2016, 09:13 AM Go to last post
  56. Sample size

    Dear colleagues, I have a question that has become a bone of contention among my colleagues. Id be very grateful if you commented. What are...

    Started by Anthony_1000‎, 12-26-2016 08:28 AM
    • Replies: 0
    • Views: 581
    12-26-2016, 08:28 AM Go to last post
  57. Choosing the right statistical procedure - GLM repeated measure?

    Hello, I would appreciate any help to determine the right statistical method to analyze the next research question. The research population is...

    Started by Netti‎, 12-23-2016 03:11 PM
    glm repeated measure
    • Replies: 2
    • Views: 797
    12-24-2016, 08:26 PM Go to last post
  58. Query about study design

    Dear All, I am currently working on designing a research project for my postgraduate psychology qualification and I am not quite sure if I am on the...

    Started by zammitr‎, 12-23-2016 06:32 AM
    • Replies: 0
    • Views: 543
    12-23-2016, 06:32 AM Go to last post
  59. Which method shall I use?

    Hello, I am working on my first paper and I feel quite lost with the statistical method. Hope you can help me! I am comparing two samples from...

    Started by AJLRB‎, 12-08-2016 02:43 AM
    contingecy table
    • Replies: 4
    • Views: 1,060
    12-12-2016, 09:04 AM Go to last post
  60. Question Which ANOVA?

    Hi there :) I am struggling to determine which would be the most appropriate ANOVA analysis to use for some work I am doing. I have 3...

    Started by roseberry‎, 12-10-2016 06:39 AM
    anova, contrasts, independent groups, one way anova, spss anova
    • Replies: 1
    • Views: 748
    12-10-2016, 05:00 PM Go to last post

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