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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: 19,588
    11-09-2005, 11:21 PM Go to last post
  1. Post When to control for multiple comparisons?

    I have a test that I have given people, and it is looking at two particular variables. Each variable has two item types. So either an item is, for...

    Started by sunlight123‎, Today 11:36 AM
    anovas, familywise error, multiple comparisons
    • Replies: 0
    • Views: 27
    Today, 11:36 AM Go to last post
  2. Nonparametric equivalent to a factorial ANOVA?

    Hi, Does anyone know of a nonparametric equivalent to a factorial ANOVA? I can't run a parametric test because I have violations of normality of...

    Started by coffee123‎, 09-20-2016 11:03 PM
    • Replies: 8
    • Views: 212
    Today, 10:21 AM Go to last post
  3. How do I examine statistical differences between sensitivity and specificity values?

    Hi again, I have created sensitivity and specificity values for 2 devices against a gold standard. I would like to see whether these 2 devices...

    Started by coffee123‎, Today 12:25 AM
    • Replies: 1
    • Views: 65
    Today, 08:46 AM Go to last post
  4. Sample Size Requirements (Power of .80.....)

    Hi everyone, first post here :) Hoping to get some help with finding appropriate sample size for a little study. Ill try to give all relevant...

    Started by allie_moore‎, Yesterday 12:51 PM
    • Replies: 1
    • Views: 70
    Today, 12:27 AM Go to last post
  5. Combining measures into 1 variable

    I have 2 variables, one that measures (just for an examples) state aggression, and 1 that measures trait aggression. The state measure was responded...

    Started by lsrms3‎, 09-04-2016 01:11 PM
    combine measure, measure, question, statistics, variable
    • Replies: 7
    • Views: 336
    09-21-2016, 06:08 PM Go to last post
  6. Different results between MANOVA and Regression (PROCESS - moderated Mediation)

    I have to calculate a moderated mediation with 2 mediators and 2 dependent variables. My model: predictor (dichotomous) moderator...

    Started by yologer‎, 09-19-2016 11:03 AM
    • Replies: 1
    • Views: 137
    09-20-2016, 10:51 AM Go to last post
  7. Between and within group differences

    I am doing a research project on antisocial youth behavior and SES inequality. I am supposed to run two level logistic regression in STATA. There is...

    Started by Nour13‎, 09-15-2016 06:41 AM
    logistic regression, multi level, stata
    • Replies: 0
    • Views: 83
    09-15-2016, 06:41 AM Go to last post
  8. Testing an exploratory factor analysis model?

    Dear colleagues, Is an exploratory factor analysis (EFA) model testable? is it common to test an EFA model using fit indices? the plausibility of a...

    Started by Anthony_1000‎, 09-13-2016 01:16 PM
    • Replies: 1
    • Views: 116
    09-13-2016, 08:40 PM Go to last post
  9. PROCESS: Interaction term not significant but conditional indirect effect

    Hello, my moderated mediation model with a mediation effect (two mediators), but PROCESS is telling my that my moderating effect (one moderator)...

    Started by yologer‎, 09-13-2016 06:40 AM
    • Replies: 0
    • Views: 78
    09-13-2016, 06:40 AM Go to last post
  10. Falsify Normality results

    Is it possible to falsify normality results - in order to conduct parametric analysis of results? Or will someone be able to tell?

    Started by ivyc‎, 09-12-2016 10:45 AM
    falsify, normality, statistics
    • Replies: 3
    • Views: 145
    09-13-2016, 02:17 AM Go to last post
  11. Power calculation

    Conducted a preliminary study & want to determine if i need more participants. How do I do this using spss 30 n , 10 stimuli (2 subcategories, 5...

    Started by ivyc‎, 09-07-2016 01:50 PM
    power, psychology, spss
    • Replies: 2
    • Views: 184
    09-09-2016, 10:36 AM Go to last post
  12. Assumption of Equal Sample Size for Publication Bias Analysis

    I am trying to do a meta analysis across 30ish studies and I am reachign the point of working on the publication bias issue. Unfortunately, for...

    Started by chigou‎, 09-05-2016 11:33 PM
    • Replies: 0
    • Views: 162
    09-05-2016, 11:33 PM Go to last post
  13. CFA - compare two different models with same outcome

    Hello, I'm testing my model in a CFA which hasaccording to my EFA two factors. I had two theories: 1.) Two Factors (correlation between...

    Started by yologer‎, 08-31-2016 05:42 PM
    • Replies: 2
    • Views: 245
    08-31-2016, 06:25 PM Go to last post
  14. DIF Analyses with Missing Data

    Hi all, I'm currently analyzing items from a bank for K-12 education. I have a separate data set for each grade/subject combination (for example,...

    Started by bshelly‎, 08-23-2016 09:34 AM
    dif, missing data
    • Replies: 1
    • Views: 214
    08-31-2016, 06:01 PM Go to last post
  15. Can we test when a correlation becomes significant?

    Hi all, Apologies that this is going to be quite a basic question, I just can't seem to find an answer in books and google etc.. If say I have...

    Started by Calger‎, 08-19-2016 10:00 AM
    • Replies: 4
    • Views: 348
    08-31-2016, 04:13 PM Go to last post
  16. Compute reliability after modification my model in AMOS

    Hello, I've modified my model in AMOS to get a better fit. I've transferred my new factors with regression imputation to SPSS. I like to...

    Started by yologer‎, 08-30-2016 05:28 PM
    • Replies: 0
    • Views: 91
    08-30-2016, 05:28 PM Go to last post
  17. No bivariate correlation for mediation/moderated mediation

    Hello :) I've checked my bivariate correlation and found this pattern (graphic) Question 1: I want to test, if both mediators predict both...

    Started by yologer‎, 08-27-2016 02:09 PM
    • Replies: 0
    • Views: 154
    08-27-2016, 02:09 PM Go to last post
  18. Question comparing two sets of data

    hi, i want to check whether the two samples can be drawn from the same distribution. can i do it with chi-square test? what are the assumptions i...

    Started by hagit‎, 08-21-2016 07:41 AM
    chi square test, data set
    • Replies: 0
    • Views: 175
    08-21-2016, 07:41 AM Go to last post
  19. Smile moderated mediation

    Hi everyone, I am currently analysing a moderated mediation model. The long and short of it is that the analyses showed that the overall moderated...

    Started by timneill‎, 03-26-2014 10:46 PM
    • Replies: 8
    • Views: 2,921
    08-18-2016, 01:44 PM Go to last post
  20. Interpreting negative correlations between factors?

    Hello evetyone! I conducted factor analysis on a 30-item scale which is suppose to be measuring xenophobia. All the variables were previously...

    Started by capybara‎, 08-17-2016 08:04 AM
    factor analysis, interpretation, negative correlation
    • Replies: 1
    • Views: 138
    08-17-2016, 09:25 AM Go to last post
  21. What statistical method to use?

    I am currently designing a study and have all of the data entered but am having trouble finding the statistical method that should be used. ...

    Started by atamalu‎, 08-16-2016 01:18 PM
    • Replies: 1
    • Views: 140
    08-16-2016, 01:40 PM Go to last post
  22. Moderated Mediation Model using PROCESS

    Hello, I am running a moderated mediation model using PROCESS macro in SPSS and a bit confused with the results. The interaction of IV and...

    Started by Jchavano‎, 08-16-2016 10:20 AM
    moderated mediation, process
    • Replies: 0
    • Views: 104
    08-16-2016, 10:20 AM Go to last post
  23. Composite reliability vs Cronbach's alpha

    Hello Wondering if someone could clarify I'm developing a new measure with 10 constructs. Each construct has between 4 - 6 items. I've...

    Started by anon2000‎, 09-09-2014 03:02 AM
    2 Pages
    1 2
    composite reliability, cronbach's alpha, questionnaire development, reliability
    • Replies: 20
    • Views: 15,891
    08-15-2016, 04:23 AM Go to last post
  24. [Combining data][2-way between-groups ANOVA]

    Dear smart people, I am currently finishing my Master's in International Business Communication and I am wondering if I can combine data to...

    Started by alanacrs‎, 08-12-2016 08:50 AM
    anova, combining data
    • Replies: 0
    • Views: 114
    08-12-2016, 08:50 AM Go to last post
  25. What analysis method available? Exploratory analysis with repeated measures design.

    Hi, I would like to know if there is any analysis method that explores patterns between independent variables that are repeatedly measured. To...

    Started by Skyskipper‎, 08-12-2016 07:04 AM
    • Replies: 0
    • Views: 96
    08-12-2016, 07:04 AM Go to last post
  26. Inter-rater reliability - what analysis do I use?

    During an intensive 5-day group therapy camp, where counselors are 1:1 paired with a camper (25 campers, 25 counselors), we collected data on the...

    Started by PsychResearch‎, 08-10-2016 07:29 PM
    • Replies: 0
    • Views: 129
    08-10-2016, 07:29 PM Go to last post
  27. Unhappy Mixed ANOVA - How to interpret and write up results

    Hello everyone! I'm struggling with my first-ever data analysis using SPSS. I have conducted a mixed ANOVA using a total number of objects kept...

    Started by Viellina‎, 08-10-2016 10:38 AM
    • Replies: 0
    • Views: 127
    08-10-2016, 10:38 AM Go to last post
  28. Different Outcomes between MANOVA and PROCESS

    Hello, I'm checking a moderated mediation. First of all I put my both IV and both mediators in a MANOVA. Next I put all variables in PROCESS....

    Started by yologer‎, 08-10-2016 08:27 AM
    • Replies: 0
    • Views: 90
    08-10-2016, 08:27 AM Go to last post
  29. Question Anova: Components of variation in population (notation in Doncaster and Davey)

    Hi I am reading Doncaster and Davey's 2007 book. The book lists the appropriate ANOVA/ANCOVA models for combinations of nested and crossed...

    Started by Shraspen‎, 08-08-2016 02:45 PM
    • Replies: 0
    • Views: 185
    08-08-2016, 02:45 PM Go to last post
  30. Pair t-test with non-independent samples

    Dear list, In my experiment, each subject of my sample has three time-series of data: tc_A, tc_B and tc_C. Using Pearson correlation within...

    Started by john.gelburg‎, 08-07-2016 01:41 PM
    t-test
    • Replies: 0
    • Views: 185
    08-07-2016, 01:41 PM Go to last post
  31. 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: 0
    • Views: 147
    08-07-2016, 06:06 AM Go to last post
  32. Multilevels model versus Regression

    Assume I want to model data on dependent variable y_i for N observations belonging to J groups. Assume we are looking at N students distributed on J...

    Started by JesperHP‎, 08-03-2016 03:29 PM
    james & stein, shrinkage
    • Replies: 6
    • Views: 286
    08-05-2016, 01:11 PM Go to last post
  33. Sample size for mediation analysis

    Does anyone know of any clear guidance on how to calculate sample size for mediation analyses? My research is looking at whether the relationship...

    Started by missychar‎, 08-05-2016 04:59 AM
    • Replies: 2
    • Views: 145
    08-05-2016, 10:13 AM Go to last post
  34. Association between interval and possibly binary variables

    Hello, I am in the process of writing my dissertation proposal, which will be examining treatment outcomes in first episode psychosis clients....

    Started by emma621‎, 08-04-2016 08:47 PM
    • Replies: 1
    • Views: 156
    08-04-2016, 11:38 PM Go to last post
  35. 3-way ANOVA with unequal sample sizes (between-groups)

    Dear smart people, I am currently finishing my Master's in International Business Communication and have run into a problem with my data. I was...

    Started by alanacrs‎, 08-04-2016 05:53 AM
    anova, between-group, three-way anova, unequal sample sizes
    • Replies: 0
    • Views: 130
    08-04-2016, 05:53 AM Go to last post
  36. Comparing groups when each subject can be in multiple groups - which test?

    Hi all, I would like to compare groups on a ratio DV when each subject can belong to more than one group. I am used to data where each subject...

    Started by RobCooper‎, 08-03-2016 04:37 AM
    • Replies: 0
    • Views: 122
    08-03-2016, 04:37 AM Go to last post
  37. Mixed ANOVA post hocs-paired samples t tests or bonferroni corrected?

    Hey everyone, Just a question on what is the best statistical test to report with this study I am doing. So, in the study, I am separating...

    Started by aiyer1‎, 08-01-2016 11:05 AM
    • Replies: 0
    • Views: 212
    08-01-2016, 11:05 AM Go to last post
  38. Control Variables & moderated Mediation

    Hello, I'm testing a moderated mediation with two dependent variables, so I'm running two tests with PROCESS SPSS. I have included 5 control...

    Started by yologer‎, 07-31-2016 11:22 AM
    control variables
    • Replies: 4
    • Views: 242
    08-01-2016, 08:05 AM Go to last post
  39. Repeated measures ANOVA on correlation coefficients

    The purpose of the study is to examine a gradual linear decay in an EEG signal over a period of time. I measured the average signal over 20 bins of...

    Started by shlomit‎, 08-01-2016 01:36 AM
    correlated correlations, r to z fisher transform., repeated measures anova
    • Replies: 0
    • Views: 160
    08-01-2016, 01:36 AM Go to last post
  40. Reporting GEE results

    I'm working on a paper, and was struggling with how to analyze one question, and finally figured out that I needed to use GEE, ran the model, and...

    Started by cmc253‎, 07-29-2016 05:47 PM
    gee
    • Replies: 1
    • Views: 316
    07-29-2016, 09:20 PM Go to last post
  41. Question comparing distributions

    hi as a part of my thesis, i have two discrete distributions. i want to check if it is possible that they both drawn from the same distribution. i...

    Started by hagit‎, 07-28-2016 07:14 AM
    • Replies: 3
    • Views: 265
    07-28-2016, 06:30 PM Go to last post
  42. Wilcoxon Signed rank test, Students's T-test, or a mixture of both?

    Hello! For my dissertation I am looking at the temporal order of physiological and behavioural events before a voluntary action. I have 12 different...

    Started by pepperpockets‎, 07-27-2016 04:24 AM
    psychology, t-test, wilcoxon signed-rank test
    • Replies: 4
    • Views: 380
    07-27-2016, 08:32 AM Go to last post
  43. Meaningful Variables

    Some background: I am an early childhood educator taking my very first statistics course. We are in week three and I am already lost. We are...

    Started by amhcmh‎, 04-26-2014 11:12 AM
    • Replies: 6
    • Views: 5,174
    07-26-2016, 07:16 PM Go to last post
  44. Exclamation Discrepancy between Chi-square and sensitivity and specificity

    The performance of 19 impaired and 42 typically developing children was tested using 3 assessment parameters to see which parameter best...

    Started by Naomiyiftach‎, 07-24-2016 08:14 PM
    chi-square, chi-square help, diagnostic accuracy
    • Replies: 3
    • Views: 234
    07-25-2016, 08:32 AM Go to last post
  45. How to convert two different types of measurement (both in ms) to run a MANOVA?

    I measured reaction time and movement time in an experiment (within-subjects measures) and want to run a MANOVA in SPSS with these measures as the...

    Started by Poppy1‎, 07-19-2016 09:25 PM
    repeated measures manova, spss, z-scores
    • Replies: 2
    • Views: 428
    07-20-2016, 08:46 PM Go to last post
  46. Question Study design flaw - no participant IDs.

    Hi :wave:, I have been asked to do the statistical analysis aspect on a mixed methods study that was supposed to follow a pre/post analysis...

    Started by dublinguy‎, 07-18-2016 02:42 PM
    flaws, participants number, pre post, spss, study design
    • Replies: 5
    • Views: 373
    07-18-2016, 06:35 PM Go to last post
  47. Data screening for regression analysis

    I am currently attempting an assessment for my Psychology MSc but am a little confused by the screening required. I have three independent...

    Started by Missjeevious‎, 07-15-2016 03:24 PM
    • Replies: 4
    • Views: 316
    07-16-2016, 09:40 PM Go to last post
  48. Analyzing Sleep and Productivity Data

    You are given data that stores the hours that an individual slept every night between the data's start and end points. You are also given the...

    Started by c_harris‎, 07-12-2016 06:03 PM
    data analysis
    • Replies: 3
    • Views: 314
    07-13-2016, 11:17 AM Go to last post
  49. Interpreting findings in Behavioural Science Journal

    Hi everyone, I've been trying my best to think about how to put this problem across. The authors of the paper said they used a multinomial logits...

    Started by WebberNaturals‎, 07-11-2016 11:35 AM
    • Replies: 0
    • Views: 168
    07-11-2016, 11:35 AM Go to last post
  50. Red face The Best Statistical Analysis Method and How to calculate number of participants

    Hello all! I have a research design : As it can be seen A, B, C are independent variables; D is a mediator and E is the dependent...

    Started by Ayfer‎, 07-09-2016 12:59 PM
    • Replies: 4
    • Views: 370
    07-10-2016, 02:19 AM Go to last post
  51. Psychology Statistics Help!!!

    I need help with 3 exercises!!! I am attaching the problems. Numbers 2,4 and 8!

    Started by ALogan0623‎, 07-08-2016 01:02 PM
    • Replies: 1
    • Views: 266
    07-08-2016, 01:16 PM Go to last post
  52. two way anova?

    Hello. I am hoping you may be able to help me understand why this is a two-way anova (it is possible it isn't) The assignment gives the following...

    Started by ryancpalmer‎, 07-07-2016 11:10 AM
    • Replies: 2
    • Views: 228
    07-08-2016, 08:31 AM Go to last post
  53. Which stats test would be best to use?

    I've got an emotional recognition task. There are 3 emotions (disgust, sad, fear), each with 10 different intensities. I only have 1 group (the...

    Started by psem‎, 07-08-2016 05:47 AM
    • Replies: 1
    • Views: 185
    07-08-2016, 08:17 AM Go to last post
  54. Which statistical test should be used?

    Take a quiz and refresh your knowledge in selecting the appropriate statistical test/procedure to answer a given research question. This...

    Started by dlak‎, 07-07-2016 03:08 PM
    data analysis, quantitative research, research methods, research questions, statistical analysis
    • Replies: 0
    • Views: 235
    07-07-2016, 03:08 PM Go to last post
  55. Reporting Binomial Fully

    Hi All! I have completed a number of binomial distributions with published results for my PhD thesis - however I only reported the binomial p...

    Started by claireth‎, 07-05-2016 05:43 AM
    • Replies: 0
    • Views: 256
    07-05-2016, 05:43 AM Go to last post
  56. What is the chance of finding a partner ?

    Hello I am a short film maker who knows nothing about stats. I stumbled across a silly white paper by Peter Backus, that seems to be quite famous...

    Started by chlowden‎, 02-02-2016 04:10 AM
    • Replies: 4
    • Views: 408
    07-03-2016, 12:15 PM Go to last post
  57. Smile What is the appropriate test for testing the difference between 3 variables?

    Hi all, I have a group of n subjects. Each subject has 3 measurements x, y, and z. 1-What kind of statistical analysis I should perform to see...

    Started by zeydabadi‎, 06-29-2016 12:18 PM
    anova, ttest
    • Replies: 3
    • Views: 388
    06-30-2016, 01:37 AM Go to last post
  58. Question Pearson VS Spearman Choosing and interpreting the test

    Hello, I need to fix the problem choosing and interpreting the correct statistical test for my data. I have data from (a) Minnesota Job...

    Started by Alanky‎, 06-29-2016 05:47 AM
    pearson, quantitative research, spearman, spss, statistical test
    • Replies: 1
    • Views: 313
    06-29-2016, 08:38 AM Go to last post
  59. multidimensional scaling (with clusters)

    I am writing my bachelor's thesis which was based on a study by Buma, Bakker and Oudejans (2014). Unfortunately I just realised that I misinterpreted...

    Started by Kaia_4‎, 06-13-2016 12:14 PM
    • Replies: 11
    • Views: 455
    06-29-2016, 04:00 AM Go to last post
  60. Experimental design: find the deviant

    I have a group of trained raters for speech recordings, their rating should be based on the content. not by the gender of the speech. I want to run a...

    Started by pancy‎, 06-27-2016 12:24 AM
    • Replies: 0
    • Views: 233
    06-27-2016, 12:24 AM Go to last post

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