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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: 26,084
    11-10-2005, 12:21 AM Go to last post
  1. Compare Sexes Within Groups in Multilevel Data

    Hi everyone, I have a large data set including about 50 groups of 6 participants, with about 2/3 same-sex groups and 1/3 mixed-sex groups. ...

    Started by Hann‎, 01-23-2016 07:22 AM
    multilevel modeling
    • Replies: 1
    • Views: 469
    01-23-2016, 10:17 AM Go to last post
  2. which statistical analysis to use? MLM, t tests, ANOVA?

    Hi, my research question is "do large cognitive changes precede a period of mood stability?" (N = 30), I have 20 therapy sessions data for each...

    Started by rubelzain83‎, 01-22-2016 12:18 AM
    • Replies: 1
    • Views: 603
    01-22-2016, 06:23 AM Go to last post
  3. ANOVA vs MANCOVA

    Hello. I'm doing a study on people with high vs. low self-compassion and I want to compare them on a number of variables. Self-compassion in this...

    Started by psychoneurologist‎, 01-21-2016 09:44 AM
    ancova, mancova, spss
    • Replies: 0
    • Views: 409
    01-21-2016, 09:44 AM Go to last post
  4. Which STAT to use? Compare one persons total Seizures in a month over 12 months

    My goal is to find out if there is a significant difference between the total numbers of seizures in a month over the course of a year for one...

    Started by Shaks‎, 01-17-2016 03:37 PM
    anova, epilepsy, software search
    • Replies: 1
    • Views: 625
    01-17-2016, 10:23 PM Go to last post
  5. 1-way vs 2-way repeated measures ANOVA with missing data

    I have performed an experiment where I tested how long it took users to reach various points on table and their perception of how difficult the task...

    Started by blooop‎, 01-16-2016 03:03 PM
    • Replies: 4
    • Views: 1,999
    01-17-2016, 12:11 PM Go to last post
  6. Difference Measurement (compare means) between two continuous variables

    Hello, I'm looking for a test and need some help :( .. Variable 1: value (continuous) Variable 2: expectation (continuous) Dependent...

    Started by yologer‎, 01-15-2016 09:08 AM
    compare means
    • Replies: 5
    • Views: 679
    01-15-2016, 12:36 PM Go to last post
  7. Question What is best method to calculate correlation for 2 nominal variables?

    Hello, I am analyzing data that looks at several nominal variables (e.g. employment status, race, gender, etc.) to determine if it plays a factor...

    Started by greathl21‎, 01-14-2016 02:27 PM
    correlation, cramer's v, nominal variable
    • Replies: 5
    • Views: 1,086
    01-14-2016, 05:03 PM Go to last post
  8. Dealing with Score Dependency in Repeated Measures ANOVA

    I am writing a report for my company looking at the impact of a relationship education curriculum on participants. Prior to the class, immediately...

    Started by statsgirl87‎, 01-11-2016 05:20 PM
    repeated measures anova, score dependency
    • Replies: 3
    • Views: 911
    01-13-2016, 01:36 AM Go to last post
  9. Between-subjects or mixed design depending on ANCOVA conducted

    Hello, In a study I'm evaluating,*participants experienced the same stressful event and were then split into 5 different experimental conditions....

    Started by bedalo94‎, 01-11-2016 08:49 AM
    • Replies: 1
    • Views: 573
    01-12-2016, 02:16 PM Go to last post
  10. curvilinear regression using 2covariates

    Hello, For my dissertation I am looking at the effects of overparenting (cont. variable) on students' self-regulated learning (cont. variable). I...

    Started by bre384‎, 01-11-2016 09:21 PM
    • Replies: 1
    • Views: 546
    01-12-2016, 06:37 AM Go to last post
  11. Gender differencies + effect size

    Hi, I have just received some results from various tests. I would like to check the gender differencies (boys vs girls) in test scores. I am...

    Started by lohengrin‎, 12-27-2015 11:37 AM
    cohen function, wilcox test
    • Replies: 2
    • Views: 1,542
    12-30-2015, 05:52 PM Go to last post
  12. Factorial MANOVA or multivariate multiple linear regression? (2 DVs and 6 IVs)

    Hello, Very briefly, I'm working on my research proposal for my Psych MSc, and I'm trying to work out which tests would be best to use. As it...

    Started by ArielPsych‎, 12-30-2015 08:57 AM
    psychology statistics, stats help
    • Replies: 0
    • Views: 978
    12-30-2015, 08:57 AM Go to last post
  13. Repeated Measures of Latent Variable DV? [Which Test?]

    Hello, I'm attempting to analyze the effects of 1 categorical IV (before and after participants complete a program) on 1 latent variable DV that...

    Started by magwai‎, 12-22-2015 09:24 AM
    • Replies: 0
    • Views: 660
    12-22-2015, 09:24 AM Go to last post
  14. Power analysis for GEE

    I am designing a study that would require using GEE (generalized estimating equations) to analyze repeated measures of a dichotomous variable. Is...

    Started by blc‎, 12-07-2015 02:48 PM
    dichotomous dv, gee, repeated measures design
    • Replies: 2
    • Views: 1,169
    12-18-2015, 07:32 PM Go to last post
  15. What analysis do IQ tests use?

    I can't find anywhere what statistical analysis IQ tests (like Weschler scales, BAS, etc.) use. It is not stated in any of their material (that I...

    Started by cmms‎, 12-13-2015 01:53 PM
    factor analysis
    • Replies: 3
    • Views: 1,009
    12-13-2015, 08:34 PM Go to last post
  16. Comparing between correlation coefficients

    Hi, I have experimental design which includes 3 dependent variables (Reading Mind in the Eyes test and 2 other measures of social cognition, for...

    Started by Gilina78‎, 12-13-2015 04:33 PM
    correlations; dependancy, correlations; time series, mancova, regression analysis, zsteiger's z
    • Replies: 0
    • Views: 804
    12-13-2015, 04:33 PM Go to last post
  17. What does it mean to norm an instrument say mathematics attitudes scale?

    Hello I was wondering if norming an instrument is the same as developing an instrument say some mathematics attitudes survey or something? I...

    Started by Ilma‎, 12-12-2015 10:21 PM
    • Replies: 1
    • Views: 873
    12-13-2015, 04:22 AM Go to last post
  18. marginally significant 3-way interaction ANOVA

    Hi everyone, I have to analyze the data of an intervention study, in which a treatment and control group were tested before and after the...

    Started by dejam‎, 12-12-2015 12:24 PM
    • Replies: 1
    • Views: 608
    12-12-2015, 06:23 PM Go to last post
  19. ANCOVA assumptions SPSS help..!

    Hi everyone, Just wondering if someone could help me. I need to conduct a repeated measures ancova (4 levels) with no between subjects factor....

    Started by ANCOVA'D‎, 12-10-2015 06:54 AM
    • Replies: 0
    • Views: 742
    12-10-2015, 06:54 AM Go to last post
  20. When to use Bonferroni

    I am working with a mark-all-that-apply survey question that has 8 categorical response options. I am comparing responses statistically between two...

    Started by N. Adams‎, 12-09-2015 03:42 PM
    bonferroni correction, groups, multiple response
    • Replies: 0
    • Views: 1,045
    12-09-2015, 03:42 PM Go to last post
  21. "bias" in chi-square GOF tests?

    Simple question (simple for some people) about the chi-square GOF test: Let's say we do a chi-square GOF test where the the expected values are...

    Started by bruin‎, 12-07-2015 02:14 PM
    • Replies: 1
    • Views: 1,511
    12-07-2015, 02:40 PM Go to last post
  22. Disagreement with my advisor about Cronbach's alpha for my thesis

    My psychology thesis is for an interdisciplinary degree, so I wasn't able to take any advanced methods before completing the research. I took two...

    Started by adtree74‎, 12-06-2015 03:30 PM
    • Replies: 2
    • Views: 809
    12-06-2015, 05:34 PM Go to last post
  23. What's a good resource to brush up on college level psychology stats?

    I've taken quite a few different courses, but have since forgotten some of the details. I'm interested in the applied aspects of sampling, all sorts...

    Started by etest‎, 12-02-2015 12:28 PM
    • Replies: 1
    • Views: 834
    12-02-2015, 08:24 PM Go to last post
  24. Comparing absolute values of difference scores between two groups

    I have two groups (A and B) that each completed a different version of an experimental measure (measure A and measure B). Both groups also completed...

    Started by ShakeyD‎, 12-01-2015 09:34 PM
    measurement, reliability, variance
    • Replies: 4
    • Views: 1,006
    12-02-2015, 06:19 PM Go to last post
  25. Dealing with Missing Data...

    So I have ran into an issue with my study. We utilized Qualtrics to design an online survey/study that had subjects complete 10 questionnaires and...

    Started by theemezz0‎, 11-30-2015 12:41 PM
    • Replies: 9
    • Views: 2,247
    12-01-2015, 07:19 PM Go to last post
  26. I failed the 4/5ths Rule. Can I prove it is not significant?

    I am a (hypothetical) employer who used an aptitude test to screen candidates for their trainability before hire. I am being sued for discriminating...

    Started by cellardoor367‎, 12-01-2015 11:10 AM
    eeoc, four fifths rule, t test, uniform guidelines
    • Replies: 1
    • Views: 1,151
    12-01-2015, 04:47 PM Go to last post
  27. 3 experiments and the same 3 scales as DV - run Factorial Analysis together or sep

    Hi! I realized three experiments (varying only the marketing context) and used as dependent variables the same three scales (attitude, purchase...

    Started by fabiorfborges‎, 11-30-2015 06:40 AM
    experiments, factor analysis
    • Replies: 1
    • Views: 663
    12-01-2015, 08:09 AM Go to last post
  28. Question Repeated measures ANCOVA in SPSS help needed with multiple covariates

    Hello everyone. Hope someone can help. I have a repeated measures (4) ancova I need to run with no between subjects factor. I have 5 covariates....

    Started by ANCOVA'D‎, 11-26-2015 01:15 PM
    ancova, repeated measures
    • Replies: 2
    • Views: 992
    11-27-2015, 06:14 AM Go to last post
  29. Help me in two way anova please

    After using log transformation, my data is homogenous. So i want to use two way anova analysis. In that analysis should i data that has been...

    Started by Sabila‎, 11-25-2015 03:42 PM
    • Replies: 3
    • Views: 890
    11-26-2015, 03:32 AM Go to last post
  30. Is this data normally distributed?

    Got my question answered. Thank you guys

    Started by paperrockbazooka‎, 11-24-2015 08:22 PM
    • Replies: 5
    • Views: 1,580
    11-26-2015, 02:25 AM Go to last post
  31. Help in Levene's test, Please

    Hi, I did an experiment, studying on the effects of types of sugar and their concentrations on milk spoilage. The sugars I was using are sucrose,...

    Started by bom_bomkung‎, 11-30-2006 09:51 PM
    • Replies: 13
    • Views: 31,793
    11-25-2015, 03:39 PM Go to last post
  32. Incremental validity testing

    Hi everyone, The short story first: I was asked by reviewers to formally test whether a variable V1 is incrementally valid (explains more...

    Started by katsch‎, 11-25-2015 01:00 AM
    • Replies: 0
    • Views: 693
    11-25-2015, 01:00 AM Go to last post
  33. t-test help- what is the IV???

    I did an experiment where I got data on children’s playmate choices (like if they chose to play with boys or girls or both or neither). My...

    Started by heeeeeellllllpppppppppp‎, 11-18-2015 03:05 PM
    proportion test
    • Replies: 8
    • Views: 1,085
    11-19-2015, 06:07 AM Go to last post
  34. multiple regfression

    Hello forum.I am very new in statistics so pardon me if the questions are too silly:) Within the frameworks of a lab report, i conducted a multiple...

    Started by LEMONIAS‎, 11-14-2015 11:37 PM
    • Replies: 8
    • Views: 1,045
    11-16-2015, 11:16 PM Go to last post
  35. creating scores based on LCA classification

    With LCA (Mplus) on 11 variables, we grouped 1100 patients into 3 classes. Now, we want to create a score, to classify future patients to one of...

    Started by fengyuwuzu‎, 11-13-2015 10:13 AM
    • Replies: 0
    • Views: 656
    11-13-2015, 10:13 AM Go to last post
  36. How to create norms for a new assessment?

    If a novel assessment is created and tested on hundreds of participants, what is the process of converting raw scores to standard scores with a mean...

    Started by blc‎, 11-12-2015 11:19 AM
    • Replies: 1
    • Views: 1,099
    11-12-2015, 11:30 AM Go to last post
  37. Bar graph showing difference of means

    Is there a way to create a bar graph, with multiple DVs, showing the difference between the means of the IV? I have two experimental conditions and...

    Started by Tigerlily‎, 11-09-2015 04:10 PM
    bar graph, difference of means, multiple dv's
    • Replies: 8
    • Views: 1,318
    11-11-2015, 04:57 PM Go to last post
  38. Regression to the mean

    Hello, I have a question concerning regression to the mean. Suppose there is a test X, which is taken by 30 people. Person A has a score of 10...

    Started by Helge‎, 11-06-2015 02:15 PM
    • Replies: 1
    • Views: 789
    11-10-2015, 03:09 AM Go to last post
  39. What statistical test should I use.

    So I am writing a report on whether mean intelligence through an IQ test and mean psychopathy scores (DV) are significant in different types of crime...

    Started by TomXD1‎, 11-04-2015 01:17 PM
    analysis, psychology, test
    • Replies: 0
    • Views: 819
    11-04-2015, 01:17 PM Go to last post
  40. How do you display the correlation significance level (.08**) in AMOS

    Sorry this is a basic question but I can't figure out how to display the significance level asterisks associated with the correlations/covariances on...

    Started by Cardale‎, 11-03-2015 03:23 PM
    • Replies: 0
    • Views: 497
    11-03-2015, 03:23 PM Go to last post
  41. Question (SPSS) Meta-analysis about control variables in psychology research

    Hello everyone, I'm doing a research on the use of control variables in studies about 'the psychological contract'. I'm almost done with my...

    Started by Paolo‎, 11-03-2015 12:58 PM
    coding, control variables, psychological contract, spss
    • Replies: 0
    • Views: 693
    11-03-2015, 12:58 PM Go to last post
  42. Z-Scores: Finding the score which separates the top 40% from the bottom 60%?

    Hi there I am struggling a little with my z-scores. This was one of my questions which I do not understand: For a normal distribution with a mean...

    Started by gpmp1996‎, 11-03-2015 04:36 AM
    z-scores
    • Replies: 1
    • Views: 1,103
    11-03-2015, 09:56 AM Go to last post
  43. If total variance explained is less than 60%...

    I am conducting an exploratory factor analysis of some data exploring bullying behaviour. In my initial EFA I have found that 11 factors were...

    Started by rubyred89‎, 11-01-2015 04:25 PM
    • Replies: 4
    • Views: 1,765
    11-03-2015, 05:17 AM Go to last post
  44. How to analyze dichotomous DV with between- and within-subjects factors?

    Hello everybody, I am designing a study and need to make sure I'll be able to analyze the data (or else I will modify the design). For the...

    Started by blc‎, 10-27-2015 11:04 PM
    dichotomous dv, logit regression, mixed design, multilevel modeling, within-subject
    • Replies: 2
    • Views: 967
    10-28-2015, 02:55 PM Go to last post
  45. Physiological response to musical stimuli

    I have performed a study whereby I measure participant’s physiological response (HRV which is a continuous variable) to different musical stimuli....

    Started by p_billy_c‎, 10-26-2015 04:10 AM
    • Replies: 4
    • Views: 878
    10-28-2015, 06:59 AM Go to last post
  46. How to analyse data when subjects received both control and experimental condition?

    Dear all, I hope to get some suggestions on how to analyse the data from an experiment I recently ran. My question is whether a new treatment has a...

    Started by Marieke21‎, 10-27-2015 10:09 AM
    control condition, pre-post, repeated measures, treatment
    • Replies: 2
    • Views: 623
    10-27-2015, 10:37 AM Go to last post
  47. Checking homogeneity of regression with multiple covariates

    Hi, I am running an ANCOVA with 2 fixed factors, while controlling for 3 covariates, and I would like to test the assumption of homogeneity of...

    Started by nielsl‎, 10-27-2015 08:56 AM
    • Replies: 0
    • Views: 423
    10-27-2015, 08:56 AM Go to last post
  48. Help please with bootstrapping HMR SPSS output interpretation and reporting

    Hi I am in the middle of writing up a lab that is due in 12 hours (eeekkkk!!) and I am having issues interpreting the SPSS output on a bootstrapped...

    Started by Becdev‎, 10-25-2015 05:01 AM
    • Replies: 0
    • Views: 668
    10-25-2015, 05:01 AM Go to last post
  49. Non-parametric and parametric tests combined ??

    Hi everyone, I'm achieving a postdoc study in Psychology (75 participants) in Belgium and I need your help... The aim of the study is to look at...

    Started by shaxhe‎, 10-19-2015 08:21 AM
    • Replies: 6
    • Views: 1,019
    10-20-2015, 01:37 PM Go to last post
  50. Post I would really appreciate your Help very important to me

    I have an exam next week and I got sample questions that look like these two below: It would really help if someone would explain me just a...

    Started by Henrico‎, 10-20-2015 01:09 PM
    • Replies: 0
    • Views: 659
    10-20-2015, 01:09 PM Go to last post
  51. presenting the results of logistic regression with dichotomous IVs

    I have a question about how to present the results of a series of 6 logistic regressions in which I have the same 2 dichotomous/binary IVs. The...

    Started by charles matthew‎, 10-18-2015 08:38 PM
    binary outcome, dichotomous iv, logistic regression, presentation
    • Replies: 1
    • Views: 741
    10-19-2015, 08:13 AM Go to last post
  52. w-score vs. z-score with age/sex covariate

    Hi everyone, I want to predict gray matter (GM) volume in a group of patients based on their degree of cognitive impairment, corrected for age and...

    Started by AnLo‎, 10-15-2015 10:14 AM
    z-score
    • Replies: 0
    • Views: 783
    10-15-2015, 10:14 AM Go to last post
  53. Research statistics conundrum!

    Hello, I'm completing my proposal for my dissertation and I've gotten to the statistical analysis and having a bit of a me***own, hoping to get some...

    Started by getlonelyy‎, 10-15-2015 04:16 AM
    • Replies: 0
    • Views: 601
    10-15-2015, 04:16 AM Go to last post
  54. MANOVA vs Chi Square (and continuous variables?)

    **edited to add: Hmmm, maybe I should have named the thread MANOVA vs. Chi Square vs. two regression analyses?** Hi all, I'm in the final stages...

    Started by jessireebob‎, 10-11-2015 09:22 AM
    • Replies: 0
    • Views: 580
    10-11-2015, 09:22 AM Go to last post
  55. BEST STATISTIC TO USE for TWO STATIC GROUPS?

    I am formulating a study which involves first separating participants into two groups for a specific sleep disorder experienced either no/low fear ...

    Started by yudkush‎, 10-05-2015 08:14 PM
    • Replies: 0
    • Views: 791
    10-05-2015, 08:14 PM Go to last post
  56. psych stats

    vampires in rumanian are 315 years old, on average, with a standard deviation of 5, and the distribution of their ages is mound-shaped and...

    Started by dorion83‎, 10-02-2015 05:59 PM
    • Replies: 3
    • Views: 881
    10-02-2015, 07:10 PM Go to last post
  57. Thumbs up value for the balance of 2 categories (while controlling for absolute number)

    Hi! Thank you so much for any help! Situation: I have different ascriptions per subject which are categorized in female (f), male (m) and...

    Started by Nelly2‎, 10-02-2015 09:07 AM
    • Replies: 0
    • Views: 492
    10-02-2015, 09:07 AM Go to last post
  58. Subscale CFA

    Hi, An existing questionnaire I am using (23 items, supposedly 2 subscales, N = 700) has shown poor fit to the 2-factor model as specified by its...

    Started by nielsl‎, 10-01-2015 08:35 AM
    cfa
    • Replies: 2
    • Views: 922
    10-02-2015, 04:34 AM Go to last post
  59. four way anova

    Hi, I conduct a research with 4 between-subjects independent variables (2 levels each) and 1 dependant variable. I intrested to find out if there...

    Started by natan1‎, 09-30-2015 09:20 AM
    • Replies: 1
    • Views: 995
    09-30-2015, 11:38 AM Go to last post
  60. Question Implications for analysis of survey data when recall time frames differ bt questions

    Hi, I am advising some folks on setting up a brief survey containing questions that measure some well-known health indicators. My curiosity was...

    Started by SabbyATL‎, 09-25-2015 11:48 AM
    recall, survey, time frames
    • Replies: 6
    • Views: 1,643
    09-30-2015, 10:05 AM Go to last post

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