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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: 29,846
    11-10-2005, 12:21 AM Go to last post
  1. 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, 09-24-2016 12:25 AM
    • Replies: 5
    • Views: 2,067
    09-25-2016, 01:16 AM Go to last post
  2. 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: 2,142
    09-21-2016, 06:08 PM Go to last post
  3. 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: 1,513
    09-20-2016, 10:51 AM Go to last post
  4. 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: 1,017
    09-13-2016, 08:40 PM Go to last post
  5. 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: 1,652
    09-13-2016, 02:17 AM Go to last post
  6. 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: 1,054
    09-09-2016, 10:36 AM Go to last post
  7. 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: 960
    09-05-2016, 11:33 PM Go to last post
  8. 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: 1,341
    08-31-2016, 06:25 PM Go to last post
  9. 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: 1,837
    08-31-2016, 06:01 PM Go to last post
  10. 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: 2,453
    08-31-2016, 04:13 PM Go to last post
  11. 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: 1,685
    08-30-2016, 05:28 PM Go to last post
  12. 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: 1,307
    08-27-2016, 02:09 PM Go to last post
  13. 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: 1,742
    08-21-2016, 07:41 AM Go to last post
  14. 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: 662
    08-17-2016, 09:25 AM Go to last post
  15. 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: 1,240
    08-16-2016, 01:40 PM Go to last post
  16. 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: 747
    08-16-2016, 10:20 AM Go to last post
  17. [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: 755
    08-12-2016, 08:50 AM Go to last post
  18. 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: 741
    08-12-2016, 07:04 AM Go to last post
  19. 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: 1,119
    08-10-2016, 07:29 PM Go to last post
  20. 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: 1,181
    08-10-2016, 10:38 AM Go to last post
  21. 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: 1,106
    08-10-2016, 08:27 AM Go to last post
  22. 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: 512
    08-08-2016, 02:45 PM Go to last post
  23. 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: 972
    08-07-2016, 01:41 PM Go to last post
  24. 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: 1,513
    08-05-2016, 01:11 PM Go to last post
  25. 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: 1,126
    08-05-2016, 10:13 AM Go to last post
  26. 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: 488
    08-04-2016, 11:38 PM Go to last post
  27. 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: 1,337
    08-04-2016, 05:53 AM Go to last post
  28. 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: 674
    08-03-2016, 04:37 AM Go to last post
  29. 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: 2,008
    08-01-2016, 11:05 AM Go to last post
  30. 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: 1,587
    08-01-2016, 08:05 AM Go to last post
  31. 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: 645
    08-01-2016, 01:36 AM Go to last post
  32. 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: 2,444
    07-29-2016, 09:20 PM Go to last post
  33. 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: 1,586
    07-28-2016, 06:30 PM Go to last post
  34. 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: 2,035
    07-27-2016, 08:32 AM Go to last post
  35. 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: 11,440
    07-26-2016, 07:16 PM Go to last post
  36. 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: 2,437
    07-25-2016, 08:32 AM Go to last post
  37. 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: 1,168
    07-20-2016, 08:46 PM Go to last post
  38. 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: 1,151
    07-18-2016, 06:35 PM Go to last post
  39. 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: 980
    07-16-2016, 09:40 PM Go to last post
  40. 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: 1,172
    07-13-2016, 11:17 AM Go to last post
  41. 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: 808
    07-11-2016, 11:35 AM Go to last post
  42. 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: 1,197
    07-10-2016, 02:19 AM Go to last post
  43. 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: 1,186
    07-08-2016, 01:16 PM Go to last post
  44. 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: 2,333
    07-08-2016, 08:31 AM Go to last post
  45. 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: 1,973
    07-08-2016, 08:17 AM Go to last post
  46. 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: 1,276
    07-07-2016, 03:08 PM Go to last post
  47. 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: 638
    07-05-2016, 05:43 AM Go to last post
  48. 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 05:10 AM
    • Replies: 4
    • Views: 1,648
    07-03-2016, 12:15 PM Go to last post
  49. 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: 1,224
    06-30-2016, 01:37 AM Go to last post
  50. 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: 2,189
    06-29-2016, 08:38 AM Go to last post
  51. 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: 1,147
    06-29-2016, 04:00 AM Go to last post
  52. 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: 991
    06-27-2016, 12:24 AM Go to last post
  53. Non-Normality - Measuring of stereotypes

    Hello :) I'm researching a moderated mediation (2x2) with two mediators. To test my MANOVA and moderated mediation I have to check the normality...

    Started by yologer‎, 06-26-2016 03:43 PM
    manova, normality
    • Replies: 0
    • Views: 581
    06-26-2016, 03:43 PM Go to last post
  54. Guidance for type of statistical test to use

    I am self doubting myself as I have been looking at this screen for too long. I am interested in testing emotion discrimination in adults using a...

    Started by sAL2016‎, 06-24-2016 08:59 PM
    • Replies: 1
    • Views: 747
    06-24-2016, 11:32 PM Go to last post
  55. Deleting outliers to boost correlation. A sound practice?

    Dear all, I have two measures with a correlation of .20, the sample size is 210. I expected a higher correlation. I deleted around 60 outliers and...

    Started by Anthony_1000‎, 06-24-2016 03:48 AM
    • Replies: 5
    • Views: 1,603
    06-24-2016, 06:25 PM Go to last post
  56. Bonferroni vs. Modified Bonferroni

    Hello, I was wondering if anyone knows when it is appropriate to use a Bonferroni correction over a Modified Bonferroni correction? Thanks :)

    Started by StatStud1‎, 06-17-2016 11:18 PM
    bonferroni
    • Replies: 1
    • Views: 1,000
    06-18-2016, 07:24 AM Go to last post
  57. Factor analysis

    Hello! Apologies if the answer is very obvious but i am new to this. I am running an exploratory factor analysis for a scale developement study....

    Started by LEMONIAS‎, 06-07-2016 01:17 PM
    2 Pages
    1 2
    • Replies: 22
    • Views: 5,276
    06-15-2016, 06:34 PM Go to last post
  58. Post Help me (Bachelor Project) Rank Order Scale

    hi, i am from indonesian sorry for bad ENGLISH grammar. i have problem with Rank Scale Order. so here we go, i have questionnaire for 10...

    Started by cybercutte‎, 06-13-2016 04:37 AM
    • Replies: 1
    • Views: 951
    06-13-2016, 12:04 PM Go to last post
  59. Survey item analysis, two ways to report low rated items. Is my friend wrong?

    My friend and I analyzed the same data but came up with two different sets of results :shakehead . I'd like help to understand why. Situation:...

    Started by Michael T‎, 06-09-2016 04:47 PM
    analysis, likert items, likert scales
    • Replies: 1
    • Views: 639
    06-09-2016, 07:41 PM Go to last post
  60. parametric or non-parametric in comparison of a dependent variable within several gro

    down vote favorite I am comparing maths and chemistry scores of students in several schools. I am not comparing the schools with each other. I am...

    Started by tabrizbalasi‎, 06-09-2016 04:15 PM
    nonparametric, normal distribution, normality, parametric
    • Replies: 0
    • Views: 789
    06-09-2016, 04:15 PM Go to last post

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