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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: 27,689
    11-10-2005, 12:21 AM Go to last post
  1. 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: 12
    • Views: 3,039
    12-07-2016, 03:38 AM Go to last post
  2. 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: 10
    • Views: 6,813
    12-07-2016, 03:29 AM Go to last post
  3. Hypothesis Testing and Pearson's Homework Help PLS

    I have 2 questions I need help with: 1.You own the company that makes the cheap store brand wine for Walmart (Chateau Trailerparc). You think most...

    Started by portcity‎, 12-04-2016 02:42 PM
    • Replies: 0
    • Views: 1,544
    12-04-2016, 02:42 PM Go to last post
  4. Outliers in categorical data?

    Hello! I am working on a pre-analysis plan and have to specify what I am going to do with outliers. I have two categorical variables (5 levels and...

    Started by cynnetje‎, 12-02-2016 05:45 PM
    boxplot, categorical, chi-square, outlier
    • Replies: 2
    • Views: 2,019
    12-02-2016, 06:41 PM Go to last post
  5. How to include hanging control in ANOVA analysis on SPSS

    Hi all, I'm hoping to get some advice on how to run ANOVAs in SPSS for a design that includes a hanging control group. I'm interested in how...

    Started by tantsevat‎, 04-13-2015 12:45 PM
    3 x 3 + 1, anova, hanging control, spss
    • Replies: 2
    • Views: 2,685
    11-30-2016, 10:53 AM Go to last post
  6. 2x2x3 Anova, what will it tell me?

    Hi - I would like to compare the means of a DV (emotional intelligence) between three different variables, those being; 1) Gender (are the...

    Started by TruroJP‎, 11-28-2016 12:00 PM
    2x2 anova, anova, compare 2 means, statistical analysis
    • Replies: 2
    • Views: 1,638
    11-29-2016, 02:58 PM Go to last post
  7. Which analysis to choose? Urgent

    Hi, any help is greatly appreciated. I have data from the same children at ages 4, 7 and 11 for a variable (self-regulation) created from a...

    Started by TruroJP‎, 11-27-2016 05:31 PM
    analysis help, anova, compare 2 means, longitudinal analysis, stata 14
    • Replies: 5
    • Views: 2,163
    11-27-2016, 09:44 PM Go to last post
  8. effect size calculations for longitudinal mixed effects models

    I have been working with a financial database and recently got comments from a reviewer on my manuscript. The comments stemmed from how I calculated...

    Started by the42up‎, 11-25-2016 01:07 PM
    • Replies: 0
    • Views: 1,799
    11-25-2016, 01:07 PM Go to last post
  9. How to analyze repeated measures game data with changing difficulty levels?

    Participants: 19 children participated in the study. Children were grouped in groups G1 (N=8) and group G2 (N=11) based on their behaviors. A...

    Started by skirshna‎, 11-23-2016 07:23 PM
    different outcomes, hierarchical, mixed model, repeated ancova, repeated measures design
    • Replies: 2
    • Views: 1,854
    11-23-2016, 10:33 PM Go to last post
  10. Repeated measures when pre/post group is not independent or dependent

    Hello, I am running a pre-post study using several different instruments (e.g. 1-5 Likert scale instruments which produce a final score). It is...

    Started by lindsayh1‎, 11-22-2016 11:28 AM
    repeated measure, t-test two-sample
    • Replies: 2
    • Views: 1,896
    11-23-2016, 08:48 AM Go to last post
  11. Limits for missing values in the multiple imputation method

    I have an understanding question and I need help. I have a record with many missing values. I now wanted to use the multipile Imputation method to...

    Started by Syntax6‎, 11-17-2016 10:49 AM
    missing values, multiple imputation, psycology
    • Replies: 6
    • Views: 2,042
    11-19-2016, 07:22 AM Go to last post
  12. IV = 2 levels, DV = rank list from 1-8. Not sure how to explore variability between

    Greetings, Iím new to this forum and excited about enhancing my stats skills. Iím interested in exploring if there is a difference between two...

    Started by Luxor‎, 11-14-2016 09:38 PM
    • Replies: 0
    • Views: 1,595
    11-14-2016, 09:38 PM Go to last post
  13. Mixed-effects modelling of response data (multiple stimuli&subjects) in Matlab

    I have preference ratings (integers from 1-to-7) for k=80 stimuli, obtained from N=30 subjects. I want to use a mixed-effects model to test how well...

    Started by wildetudor‎, 11-08-2016 06:24 PM
    • Replies: 3
    • Views: 1,852
    11-14-2016, 01:05 PM Go to last post
  14. ?? 2 way ANOVA with both Between and a 2 way ANOVA with one between and one within ??

    Hello all, Can someone please explain how this works, as my text book just BRIEFLY touched on it. Lets say I want to run two studies. ...

    Started by allie_moore‎, 11-10-2016 04:57 PM
    • Replies: 2
    • Views: 1,937
    11-12-2016, 02:32 PM Go to last post
  15. Number of responses above a threshold after considering survey error

    I am interested in how many people in my survey of people earn between $50,000 and $54,999. I construct a paper survey which asks for income in...

    Started by jakeharry‎, 11-10-2016 12:30 PM
    income, survey, threshold, uncertainty
    • Replies: 3
    • Views: 1,658
    11-11-2016, 08:47 AM Go to last post
  16. Repeated Measures with 2 categorical variables and one continuous variable

    Hello TalkStats members, Ok I have searched the web and this site and I feel like I am still lost on my problem. I have six items where...

    Started by tqh‎, 11-07-2016 04:28 PM
    • Replies: 0
    • Views: 1,699
    11-07-2016, 04:28 PM Go to last post
  17. Can someone show me a 2x3 design, with AB interaction & main effect of A and B?

    Can someone show me a 2(A)x3(B) design, with AB interaction & main effect of A and B? In terms of a graph and an explanation of the graph ? My...

    Started by allie_moore‎, 11-02-2016 11:47 PM
    • Replies: 2
    • Views: 2,084
    11-06-2016, 03:13 AM Go to last post
  18. Prediction from predicted/residual values compare to standard error of the estimate

    Hello. I have to indicate how good prediction is, by looking at the actual, predicted, and residual values, compare to the standard error of the...

    Started by yumi‎, 11-03-2016 11:32 PM
    • Replies: 1
    • Views: 1,653
    11-05-2016, 05:53 AM Go to last post
  19. Factor analysis

    Dear all, I have a question concerning a factor analysis run in Stata (principal factor, no rotation), based on 12 variables - my experience with...

    Started by dnh‎, 11-01-2016 06:10 AM
    • Replies: 0
    • Views: 1,707
    11-01-2016, 06:10 AM Go to last post
  20. Repeated ANOVA using comparable starting values?

    Hello, I have a weird problem that I've never encountered before. I'm hoping someone else might provide their insight. I am conducted a study...

    Started by PillBaxton‎, 10-25-2016 10:55 AM
    repe
    • Replies: 1
    • Views: 1,832
    10-27-2016, 02:48 AM Go to last post
  21. Need help: Running a One-way FIXED effects Between Subject, ANOVA in SPSS.

    I am having to run a One-way FIXED effects Between Subject, ANOVA in SPSS, and I am STUCK! :( Anyone care to help? I will explain the best I can...

    Started by allie_moore‎, 10-25-2016 07:36 PM
    • Replies: 1
    • Views: 2,128
    10-26-2016, 06:55 AM Go to last post
  22. 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: 21
    • Views: 30,141
    10-24-2016, 04:47 PM Go to last post
  23. Structural Equiation Modeling - Likert variable and fit indices

    Hello everybody! Thank you in advance for reading, and for trying to help! To put it briefly.. I am working with Structural Equiation Modeling...

    Started by SFArtamendi‎, 10-24-2016 10:13 AM
    likert, rmsea, sem
    • Replies: 1
    • Views: 1,861
    10-24-2016, 02:07 PM Go to last post
  24. HELP with data collection methods and data analysis in quantitative research

    I am doing a research proposal on the effect of a drug on haemorrhage growth in traumatic brain injury. what level of data measurement will i use to...

    Started by murrayk‎, 10-21-2016 08:59 PM
    • Replies: 1
    • Views: 1,664
    10-22-2016, 12:49 AM Go to last post
  25. Unhappy Quick one please: Difference between 1-way and 2-way ANOVA - Example provided

    Hello, I apologize in advance if this is too simple for these forums, but I am just wanted to be very sure. Example: A study that looks at 2...

    Started by Sagan_24‎, 09-27-2016 11:59 PM
    factorial anova, one-way anova
    • Replies: 7
    • Views: 2,254
    10-21-2016, 07:06 AM Go to last post
  26. Understanding correlations in order to test speed-accuracy trade-off in experiments

    I understand that in experiments where the measures of interest are speed (reaction time) and accuracy, for an effect to be valid one needs to make...

    Started by Poppy1‎, 10-18-2016 04:33 PM
    accuracy, correlation, reaction time, sat, speed-accuracy trade-off
    • Replies: 3
    • Views: 2,014
    10-20-2016, 05:15 PM Go to last post
  27. Regression for multiple scores obtained from multiple subjects

    Hello, I have preference ratings (1-to-7 scale) for k=80 stimuli, obtained from N=30 subjects. I would like to do a multiple regression for these...

    Started by wildetudor‎, 10-19-2016 07:08 PM
    matlab, multiple regression, regression, repeat measures
    • Replies: 0
    • Views: 1,457
    10-19-2016, 07:08 PM Go to last post
  28. Can someone give example of, 2-way randomized fixed factor Anova (between subjects)

    Hi all, can someone give a link, or even a description of a two-way randomized fixed factor design, in which all factors (2) are between subject...

    Started by allie_moore‎, 10-19-2016 01:27 PM
    • Replies: 0
    • Views: 1,225
    10-19-2016, 01:27 PM Go to last post
  29. ANOVA help

    Hi everyone, I desperately need help with this ANOVA stuff. I didn't get to do my 2nd year STATs subjects, and I have no idea how to interpret...

    Started by Dragonaire‎, 10-18-2016 06:55 PM
    • Replies: 0
    • Views: 1,629
    10-18-2016, 06:55 PM Go to last post
  30. ANOVA on simple proportional accuracy scores versus on d prime indexes

    To answer this, you would need to know what d prime is. Here is a link: http://www-psych.stanford.edu/~lera/psych115s/notes/signal/ The method I...

    Started by Poppy1‎, 10-18-2016 05:02 PM
    accuracy, anova, d prime, power, signal detection theory
    • Replies: 0
    • Views: 1,290
    10-18-2016, 05:02 PM Go to last post
  31. Lightbulb What statistical tests to use? - advice please

    Hi all I am working on a project looking at ADHD in a large sample of adolescents. I am looking to investigate whether there are any differences...

    Started by sallysolomon‎, 10-14-2016 11:21 AM
    independent sample, spss, t-test
    • Replies: 2
    • Views: 1,815
    10-17-2016, 11:38 AM Go to last post
  32. Within Subjects Repeated Measures - Overall correlation across subjects

    Iíll just start by giving a brief description of my study. Itís a memory study in which participants study an object and a cue stimulus together for...

    Started by TommyJimmy‎, 03-23-2011 08:59 AM
    • Replies: 4
    • Views: 7,522
    10-14-2016, 05:54 AM Go to last post
  33. Physiological statistics

    Hello, I am planning my study, and cannot find the answers in a textbook, please could I have some advice? I am looking at variations in muscle...

    Started by DanielWals‎, 10-13-2016 10:16 AM
    • Replies: 0
    • Views: 1,493
    10-13-2016, 10:16 AM Go to last post
  34. Incredibility Index

    Any anyone worked with the incredibility index before (Schimmack, 2012)? I've been trying to figure out exactly how it is calculated. Unfortunately,...

    Started by chigou‎, 10-11-2016 01:19 AM
    • Replies: 9
    • Views: 2,348
    10-12-2016, 10:37 AM Go to last post
  35. no interaction but moderated mediation?

    Hello, my ANOVA analysis shows me that I have no interaction between my moderator and IV. Is it still possible to test for a moderated...

    Started by yologer‎, 10-09-2016 05:22 AM
    • Replies: 3
    • Views: 1,535
    10-09-2016, 04:04 PM Go to last post
  36. 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: 2
    • Views: 1,790
    10-05-2016, 03:55 PM Go to last post
  37. Creating a summative scale for items with different number of response categories?

    Dear TalkStats users, Let me first give you my main goal: I would like to create a summative scale that I could compare with other scales (each of...

    Started by menteith‎, 10-03-2016 09:31 AM
    likert scale, likert-type scale
    • Replies: 0
    • Views: 1,029
    10-03-2016, 09:31 AM Go to last post
  38. What does only one significant standardised residual mean in 2x3 Chi Squared tables?

    Hi everyone. I'm writing up a report for my advisor, which compares count data for three conditions, across two different groups. I therefore have a...

    Started by DrJay‎, 09-29-2016 06:45 AM
    categorical data, chi squared, count data, residuals, standardized residuals
    • Replies: 2
    • Views: 1,421
    09-29-2016, 03:12 PM Go to last post
  39. What to do about higher drop out rates in one group compared to another group?

    Hey all - Something I am noticing with my data (still collecting) is that drop out rates in Group 1 is much higher than in Group 2. What is the...

    Started by allie_moore‎, 09-27-2016 12:46 PM
    • Replies: 3
    • Views: 1,643
    09-27-2016, 08:54 PM Go to last post
  40. 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, 09-24-2016 11:36 AM
    anovas, familywise error, multiple comparisons
    • Replies: 10
    • Views: 2,033
    09-27-2016, 10:22 AM Go to last post
  41. 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: 1
    • Views: 1,129
    09-26-2016, 07:44 PM Go to last post
  42. PROCESS: dichotomous moderator

    Hello, I'm testing my moderated mediation model. I have dichotomous predictor and modeator. PROCESS is telling me that: "When the moderator is...

    Started by yologer‎, 09-25-2016 11:45 AM
    • Replies: 1
    • Views: 1,052
    09-26-2016, 07:35 PM Go to last post
  43. 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, 09-23-2016 12:51 PM
    • Replies: 4
    • Views: 1,495
    09-26-2016, 10:41 AM Go to last post
  44. 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: 1,413
    09-25-2016, 01:16 AM Go to last post
  45. 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: 1,824
    09-21-2016, 06:08 PM Go to last post
  46. 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: 1,199
    09-20-2016, 10:51 AM Go to last post
  47. 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: 785
    09-13-2016, 08:40 PM Go to last post
  48. 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: 1,328
    09-13-2016, 02:17 AM Go to last post
  49. 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: 776
    09-09-2016, 10:36 AM Go to last post
  50. 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: 755
    09-05-2016, 11:33 PM Go to last post
  51. 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: 1,087
    08-31-2016, 06:25 PM Go to last post
  52. 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: 1,437
    08-31-2016, 06:01 PM Go to last post
  53. 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: 1,971
    08-31-2016, 04:13 PM Go to last post
  54. 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: 1,307
    08-30-2016, 05:28 PM Go to last post
  55. 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: 1,083
    08-27-2016, 02:09 PM Go to last post
  56. 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: 1,362
    08-21-2016, 07:41 AM Go to last post
  57. 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: 488
    08-17-2016, 09:25 AM Go to last post
  58. 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: 938
    08-16-2016, 01:40 PM Go to last post
  59. 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: 574
    08-16-2016, 10:20 AM Go to last post
  60. [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: 528
    08-12-2016, 08:50 AM Go to last post

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