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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: 29,880
    11-10-2005, 12:21 AM Go to last post
  1. 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 08:20 AM
    anova, interaction, interaction effects, two factor anova, two factors
    • Replies: 5
    • Views: 1,959
    01-12-2017, 03:45 AM Go to last post
  2. [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 02:34 PM
    anova, theory of mind
    • Replies: 1
    • Views: 2,169
    01-09-2017, 03:41 AM Go to last post
  3. 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 05:35 AM
    • Replies: 0
    • Views: 1,900
    01-05-2017, 05:35 AM Go to last post
  4. 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 11:40 AM
    • Replies: 2
    • Views: 1,766
    01-04-2017, 02:10 PM Go to last post
  5. 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 03:28 AM
    • Replies: 0
    • Views: 1,666
    01-02-2017, 03:28 AM Go to last post
  6. 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 08:33 AM
    • Replies: 0
    • Views: 1,569
    01-01-2017, 08:33 AM Go to last post
  7. 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 11:14 AM
    • Replies: 4
    • Views: 2,777
    12-31-2016, 01:58 PM Go to last post
  8. 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 01:42 PM
    effect size, fisher's exact test, odds ratios, phi
    • Replies: 2
    • Views: 3,502
    12-30-2016, 11:35 AM Go to last post
  9. 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 06:15 PM
    • Replies: 3
    • Views: 2,513
    12-29-2016, 06:04 PM Go to last post
  10. 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 09:41 AM
    linear mixed model, nested, repeated measure, within subject
    • Replies: 2
    • Views: 2,706
    12-26-2016, 10:13 AM Go to last post
  11. Sample size

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

    Started by Anthony_1000‎, 12-26-2016 09:28 AM
    • Replies: 0
    • Views: 1,810
    12-26-2016, 09:28 AM Go to last post
  12. 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 04:11 PM
    glm repeated measure
    • Replies: 2
    • Views: 2,740
    12-24-2016, 09:26 PM Go to last post
  13. 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 07:32 AM
    • Replies: 0
    • Views: 1,790
    12-23-2016, 07:32 AM Go to last post
  14. 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 03:43 AM
    contingecy table
    • Replies: 4
    • Views: 2,676
    12-12-2016, 10:04 AM Go to last post
  15. 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 07:39 AM
    anova, contrasts, independent groups, one way anova, spss anova
    • Replies: 1
    • Views: 2,263
    12-10-2016, 06:00 PM Go to last post
  16. Dissertation Trouble Using Correlations

    Hello. I am having a problem with my dissertation and I was wondering if anyone is kind enough to help me out. I am running a within-subjects...

    Started by mulhaq‎, 12-08-2016 05:39 AM
    correlations, linear effects, normal distributions, psychology experiment, reliability
    • Replies: 1
    • Views: 2,337
    12-08-2016, 07:21 AM Go to last post
  17. Correlation & Regression

    I have used regression to explain a dependent variable with a number of independent variables. The finding is that the variables with highest betaís...

    Started by Anthony_1000‎, 12-03-2016 03:29 AM
    • Replies: 5
    • Views: 3,112
    12-07-2016, 03:53 AM Go to last post
  18. 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: 3,631
    12-07-2016, 03:38 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: 10
    • Views: 8,109
    12-07-2016, 03:29 AM Go to last post
  20. 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: 1,929
    12-04-2016, 02:42 PM Go to last post
  21. 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: 2,541
    12-02-2016, 06:41 PM Go to last post
  22. 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: 3,168
    11-30-2016, 10:53 AM Go to last post
  23. 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: 2,151
    11-29-2016, 02:58 PM Go to last post
  24. 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: 2,667
    11-27-2016, 09:44 PM Go to last post
  25. 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: 2,167
    11-25-2016, 01:07 PM Go to last post
  26. 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: 2,278
    11-23-2016, 10:33 PM Go to last post
  27. 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: 2,281
    11-23-2016, 08:48 AM Go to last post
  28. 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: 2,547
    11-19-2016, 07:22 AM Go to last post
  29. 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: 1,967
    11-14-2016, 09:38 PM Go to last post
  30. 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: 2,301
    11-14-2016, 01:05 PM Go to last post
  31. ?? 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: 2,440
    11-12-2016, 02:32 PM Go to last post
  32. 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: 2,030
    11-11-2016, 08:47 AM Go to last post
  33. 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: 2,049
    11-07-2016, 04:28 PM Go to last post
  34. 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: 2,540
    11-06-2016, 03:13 AM Go to last post
  35. 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: 2,030
    11-05-2016, 05:53 AM Go to last post
  36. 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: 2,123
    11-01-2016, 06:10 AM Go to last post
  37. 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: 2,201
    10-27-2016, 02:48 AM Go to last post
  38. 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: 2,760
    10-26-2016, 06:55 AM Go to last post
  39. 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: 33,910
    10-24-2016, 04:47 PM Go to last post
  40. 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: 2,343
    10-24-2016, 02:07 PM Go to last post
  41. 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: 2,079
    10-22-2016, 12:49 AM Go to last post
  42. 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: 2,802
    10-21-2016, 07:06 AM Go to last post
  43. 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: 2,477
    10-20-2016, 05:15 PM Go to last post
  44. 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: 1,750
    10-19-2016, 07:08 PM Go to last post
  45. 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: 1,475
    10-19-2016, 01:27 PM Go to last post
  46. 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: 2,037
    10-18-2016, 06:55 PM Go to last post
  47. 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: 1,627
    10-18-2016, 05:02 PM Go to last post
  48. 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: 2,144
    10-17-2016, 11:38 AM Go to last post
  49. 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: 8,248
    10-14-2016, 05:54 AM Go to last post
  50. 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: 1,838
    10-13-2016, 10:16 AM Go to last post
  51. 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: 2,941
    10-12-2016, 10:37 AM Go to last post
  52. 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: 1,868
    10-09-2016, 04:04 PM Go to last post
  53. 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: 2,162
    10-05-2016, 03:55 PM Go to last post
  54. 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: 1,283
    10-03-2016, 09:31 AM Go to last post
  55. 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: 1,768
    09-29-2016, 03:12 PM Go to last post
  56. 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: 2,036
    09-27-2016, 08:54 PM Go to last post
  57. 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: 2,508
    09-27-2016, 10:22 AM Go to last post
  58. 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: 1,493
    09-26-2016, 07:44 PM Go to last post
  59. 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: 1,559
    09-26-2016, 07:35 PM Go to last post
  60. 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: 2,350
    09-26-2016, 10:41 AM Go to last post

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