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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. Paired sample t test vs Wilcoxon signed ranks test

    As part of assessment, we are using a five-question multiple choice pretest and posttest. We have been using the Wilcoxon signed ranks test to...

    Started by Sherrington‎, 05-19-2017 01:33 PM
    • Replies: 0
    • Views: 161
    05-19-2017, 01:33 PM Go to last post
  2. Question Choosing the righ test

    Hello, I'm a psychology student and I'm really, really bad at SPSS so I need some help. If this is not the right place to post this, please...

    Started by DanC‎, 05-14-2017 11:52 AM
    • Replies: 7
    • Views: 363
    05-16-2017, 11:05 PM Go to last post
  3. Cool How to show that 2 DVs follow different nonlinear trends along one IV

    Hi! I have collected data on an experiment where I measure two dependent variables: detection of a stimulus, and accuracy making a judgement on that...

    Started by georgekoko‎, 05-11-2017 05:35 PM
    • Replies: 0
    • Views: 136
    05-11-2017, 05:35 PM Go to last post
  4. One way ANCOVA - Data failing assumption of linearity

    Hello I'm working on my Msc in Psychology thesis, and I've chosen to explore if there are group differences between Internal vs External...

    Started by claney‎, 05-11-2017 05:08 AM
    • Replies: 0
    • Views: 119
    05-11-2017, 05:08 AM Go to last post
  5. Correction factor for density calculation of different network sizes

    Hi everyone, For my PhD research I am comparing the density of social networks of different sizes, and density is simply calculated in a linear...

    Started by Pentangeli‎, 05-10-2017 03:54 PM
    • Replies: 0
    • Views: 106
    05-10-2017, 03:54 PM Go to last post
  6. iPod Track Listening & Biological Samples— Within-Subjects Test/Regression?

    I am analyzing data in which participants listened to iPods and provided biological samples on the same days. The iPod Listening Intervention was 1...

    Started by statshelp1312‎, 05-10-2017 11:40 AM
    biological statistics, ipod, regression analysis, within-subjects
    • Replies: 0
    • Views: 96
    05-10-2017, 11:40 AM Go to last post
  7. Help with Ordinal Data

    Hi all! I have some data collected for an intervention study where we had participants from two groups (anxious vs non-anxious) undergo one of two...

    Started by LucidMind‎, 05-08-2017 02:30 PM
    • Replies: 0
    • Views: 152
    05-08-2017, 02:30 PM Go to last post
  8. Red face Test Your Quantitatie Research Design Knowledge

    CAN SOMEONE PLEASE HELP WITH THE FOLLOWING QUESTIONS??? Karsh (1983) designed an experiment on the relationship between early handling and...

    Started by letsgetstatistic‎, 04-20-2017 11:52 AM
    confounds, helping, levels of iv and dv., quiz
    • Replies: 5
    • Views: 405
    05-08-2017, 08:25 AM Go to last post
  9. Which method shall I use?

    Dear All, first of all I would like to thank you for creating and running this forum. At least there is a place where desperado like me can ask...

    Started by Zürcherin‎, 05-08-2017 06:28 AM
    • Replies: 0
    • Views: 143
    05-08-2017, 06:28 AM Go to last post
  10. All this data and IDK what to do with it.

    I need assistance. I am an undergrad social work major in a stats class. I have access to excel and SPSS. My research question: Does the lack of...

    Started by lunade‎, 05-08-2017 02:02 AM
    psychology, social work, statistics
    • Replies: 0
    • Views: 122
    05-08-2017, 02:02 AM Go to last post
  11. What analysis do I run?

    Hi All, I am conducting a study within the ASD population that is looking at IQ, executive function and adaptive skills for which of them I am...

    Started by jeannette88‎, 04-18-2017 04:04 PM
    • Replies: 11
    • Views: 465
    05-08-2017, 01:57 AM Go to last post
  12. urgent spss anova help!!!!

    I have to enter data into spss that is already given to me the study description is bellow. i would like to know three things; 1 is this a one-way...

    Started by stizzylita19‎, 04-24-2017 11:13 AM
    anova, data entry, spss
    • Replies: 4
    • Views: 198
    05-08-2017, 01:56 AM Go to last post
  13. Help in analyzing 3 raters' data in 2-way ANOVA

    Greetings, I completed a small pilot study recently that investigated a new therapy for music performance anxiety. My N=7. One hypothesis I...

    Started by dimazzadj‎, 05-07-2017 08:40 PM
    • Replies: 2
    • Views: 123
    05-08-2017, 01:55 AM Go to last post
  14. Case Study on an PROPOSED EXPERIMENT (HELP)

    CAN SOMEONE PLEASE HELP WITH THE FOLLOWING QUESTIONS??? I am not familiar with some of the more inherent design limitations and improvements? ...

    Started by letsgetstatistic‎, 05-06-2017 07:14 AM
    • Replies: 0
    • Views: 191
    05-06-2017, 07:14 AM Go to last post
  15. Question MANOVA or something else?

    Hello everyone! Please excuse my english, it is not my first language, so if something is unclear, let me know :) For my master thesis, I'm...

    Started by Panzerknacker‎, 05-02-2017 06:57 AM
    2 Pages
    1 2
    cps, manova, ttct
    • Replies: 15
    • Views: 640
    05-05-2017, 05:55 AM Go to last post
  16. Unequal group sized in repeated measures ANOVA?

    I know that a major assumption of Two-way ANOVAs are that the group sizes are equal. If I am doing a Repeated Measures ANVOA with a 2...

    Started by LucidMind‎, 05-04-2017 01:49 PM
    • Replies: 0
    • Views: 156
    05-04-2017, 01:49 PM Go to last post
  17. Need help interpreting these studies correctly

    How valid are the conclusions being drawn in the following (admittedly sketchy, they are just blogs) sources?:...

    Started by Anarcha‎, 05-03-2017 06:18 PM
    • Replies: 2
    • Views: 203
    05-04-2017, 08:25 AM Go to last post
  18. Analysis of parental leave

    Hello, in my bachelor thesis i have to use regression analysis, i used a questionnaire to collect the data. Dependent variable is the time that...

    Started by 2be‎, 04-28-2017 04:00 PM
    adjusting data, dependent variable, quantification, regression analysis
    • Replies: 1
    • Views: 255
    04-28-2017, 04:17 PM Go to last post
  19. What analysis to compare group to genpop based solely on percentile scores

    Hi guys, I'm completing my honors year in Psychology through an Australian University. I'm just about to do my results section for my thesis and need...

    Started by mkop10‎, 04-26-2017 09:45 PM
    • Replies: 1
    • Views: 210
    04-27-2017, 10:29 AM Go to last post
  20. How do I analyse this limited data? It is probably obvious but I have gone blank

    I have a job interview where I need to present the main findings of some data but I am struggling to perform a data analysis on it. They have only...

    Started by GraduateL‎, 04-23-2017 03:47 PM
    • Replies: 3
    • Views: 243
    04-25-2017, 03:45 AM Go to last post
  21. Testing differences between groups over time

    Hello, I am writing a research proposal that looks at a change in scores over time between three groups. Here is the basic set-up: Three...

    Started by bbphd17‎, 04-19-2017 09:56 AM
    • Replies: 0
    • Views: 202
    04-19-2017, 09:56 AM Go to last post
  22. Testing between scores of three groups

    17 teachers answered a survey of 27 questions for three Groups of students (below average, average, above average) The answers to the questions are...

    Started by Rolsha‎, 04-17-2017 10:10 PM
    • Replies: 6
    • Views: 352
    04-19-2017, 04:29 AM Go to last post
  23. Correcting for repeated testing with 4 mediation analyses?

    Hi guys, First time poster here, sorry if I post this at the wrong spot or something like that. For my thesis if have the following 4...

    Started by Yulir1993‎, 04-17-2017 11:00 AM
    bonferroni correction, mediation analysis, multiple testing, regression analysis, spss 23
    • Replies: 0
    • Views: 165
    04-17-2017, 11:00 AM Go to last post
  24. Descriptive Statistics and Regression Help

    Hi all, I need help writing some results for my report. I am very rusty with statistics as I've taken a long break from it all :( safe to say I...

    Started by crazycatlady‎, 04-15-2017 06:30 PM
    • Replies: 0
    • Views: 243
    04-15-2017, 06:30 PM Go to last post
  25. Correlation Analysis on Ordinal and Continuous Data (Spearman's?)

    My study is looking at the effects of working memory training on smoking related behaviour. We basically trained half participants with a dual n back...

    Started by olihowker‎, 04-14-2017 08:16 AM
    • Replies: 0
    • Views: 207
    04-14-2017, 08:16 AM Go to last post
  26. Question ANOVA What ANOVA should I use?

    I'm writing a research proposal and I'm not sure what statitical analysis I should use. I was thinking about using ANOVA, but I don't know what ANOVA...

    Started by kphill‎, 04-13-2017 04:41 PM
    • Replies: 7
    • Views: 331
    04-13-2017, 08:36 PM Go to last post
  27. Question I don't know what statistical analysis to use

    Hello, I'm writing a research proposal for my psy 400 class and I'm not sure what statistical analysis to use for my expected results. The purpose of...

    Started by kphill‎, 04-13-2017 04:13 PM
    • Replies: 0
    • Views: 148
    04-13-2017, 04:13 PM Go to last post
  28. warning: "covariance matrix of latent variables is not positive definite"

    Hi all, I ran a 5 factor CFA model, and I got a warning saying that the covariance matrix of my latent variables is not positive definite. I...

    Started by myautumn28‎, 04-13-2017 12:17 PM
    • Replies: 2
    • Views: 227
    04-13-2017, 03:12 PM Go to last post
  29. Metaanalysis Tanner-stages Probit/Logit/...

    Hello, I am running a metaanalysis about the ages of girls and boys in the Tanner-stages of puberty (https://en.wikipedia.org/wiki/Tanner_scale)....

    Started by Filip2017‎, 04-13-2017 01:41 PM
    • Replies: 0
    • Views: 200
    04-13-2017, 01:41 PM Go to last post
  30. Question Finding an overall level of Motivation (from a motivational questionnaire)

    Hi, i was hoping i could get some help concerning the statistics of factors in a Motivational Questionnaire. Long story short, in the company i...

    Started by TypicalChristy‎, 04-13-2017 10:01 AM
    absolute values, factors, motivation, overall motivation, statistics
    • Replies: 0
    • Views: 132
    04-13-2017, 10:01 AM Go to last post
  31. Tests for B mediating or moderating A->C, w/ path analysis?

    I'm hoping to use path analysis to learn more about the relationship between three individual difference variables. I'm new to Mplus and to path...

    Started by Parker5901‎, 04-12-2017 09:58 PM
    • Replies: 0
    • Views: 113
    04-12-2017, 09:58 PM Go to last post
  32. Smile Multiple IVs and DVs- which test should be used?

    Hey guys! I've been provided with a data set and asked to do two analyses based on the following study aims: 1. Look at associations between the...

    Started by psychstudent17‎, 04-12-2017 03:04 AM
    • Replies: 1
    • Views: 227
    04-12-2017, 08:25 AM Go to last post
  33. Determining sample size from confidence interval and significance level

    Hi everyone, I am studying a university level stats course at the moment and I have been given some excerises to take home that I am struggling...

    Started by sophies27‎, 04-08-2017 03:11 PM
    sample size, sample size calculation, sample size determination
    • Replies: 1
    • Views: 288
    04-09-2017, 04:31 PM Go to last post
  34. Determining If Difference Score Was Obtained By Chance

    For example lets say a counselor has been using a depression test on clients at the start of treatment and again 6 months later. When the counselor...

    Started by Stats Mang‎, 04-07-2017 11:31 AM
    alpha, difference scores, z score
    • Replies: 2
    • Views: 290
    04-07-2017, 08:36 PM Go to last post
  35. Manova?

    Hi, I am doing data analisis for my research and I kinda got stuck with it, I have seached alot and I am getting inconsistent informations if it...

    Started by Karobed‎, 04-06-2017 08:44 AM
    manova
    • Replies: 0
    • Views: 113
    04-06-2017, 08:44 AM Go to last post
  36. SEM Mediation using bootstrapping approach

    Hi, I am performing mediation analysis using structural equation modelling (I'm using the lavaan package in 'R'). I am using the bootstrapping...

    Started by EmmaL‎, 04-03-2017 01:20 PM
    bootstrapping, indirect effects, mediation, structural equation model
    • Replies: 4
    • Views: 421
    04-05-2017, 08:53 AM Go to last post
  37. POSAC - maximum possible amount of variable and how to deal with it

    Question about Partial Order Scalogram Analysis by Coordinates (POSAC) - solved right after I posted this thread. Got paper by S. Shye how to deal...

    Started by Liliana‎, 04-05-2017 06:20 AM
    • Replies: 1
    • Views: 249
    04-05-2017, 06:30 AM Go to last post
  38. Family Relationship version of Factor analysis for Japanese Groups

    I am trying to create a scale to measure "comportment" (bodily manners, gyougi) among Japanese and I am doing an exploratory factor analysis...

    Started by timtak‎, 04-03-2017 11:58 PM
    • Replies: 0
    • Views: 267
    04-03-2017, 11:58 PM Go to last post
  39. Lack of homogeneity of Variance in two-way ANOVA

    Hi, I am currently analyzing my data in SPSS. Since I am testing the effect of two independent variables on a dependent one, I was planning on...

    Started by Klaro26‎, 03-29-2017 07:56 AM
    homogeneity, levene's, significance, spss anova
    • Replies: 4
    • Views: 529
    04-02-2017, 12:03 AM Go to last post
  40. Signal detection theory - d' and C - unexpected results

    Hi I've conducted a 2-alternative forced-choice experiment whereby participants were shown images, and then in the test phase had to choose which...

    Started by iwsmuir105‎, 03-30-2017 12:51 PM
    • Replies: 1
    • Views: 286
    04-01-2017, 11:34 PM Go to last post
  41. Correction for attenuation: WAIS-IV and test X

    Hi, I have been asked to do a correction for attenuation of the context between a specific test (Lets call it test X) and a specific part-test of...

    Started by UnnieE‎, 03-30-2017 09:48 AM
    attenuation, reliability, wais-iv
    • Replies: 7
    • Views: 476
    03-30-2017, 03:08 PM Go to last post
  42. Interpreting my data (bias?)

    Hello everyone! I had participants learn items from a list and afterwards do a recognition test on them. (EXPERIMENTAL GROUP) the same...

    Started by laraa‎, 03-24-2017 11:47 AM
    • Replies: 0
    • Views: 572
    03-24-2017, 11:47 AM Go to last post
  43. Correct way of reporting Chi square with IV 4 levels results

    Sorry, if the question is silly. Cannot find anywhere what will be a correct way of reporting Chi Square results for the case when IV has 4 levels (4...

    Started by Liliana‎, 03-23-2017 07:28 AM
    • Replies: 4
    • Views: 529
    03-23-2017, 10:02 PM Go to last post
  44. Signal Detection Theory - Calculating d'

    Hi there. I'm currently doing the analysis for my undergraduate study, and I'm wondering if someone could help me with Signal Detection Theory,...

    Started by iwsmuir105‎, 03-23-2017 10:56 AM
    • Replies: 3
    • Views: 502
    03-23-2017, 12:43 PM Go to last post
  45. Need help in Polynomial Regression : constant value and control variables

    Solved. Please remove thank you : )

    Started by angelove114‎, 03-22-2017 11:50 PM
    • Replies: 0
    • Views: 303
    03-22-2017, 11:50 PM Go to last post
  46. Which post-hoc test for a One way repeated measures ANOVA

    Can I use a Tukey test to test all pairwise comparisons for a repeated measures design? :) THANKS

    Started by rachel_joke‎, 03-22-2017 06:03 AM
    • Replies: 3
    • Views: 405
    03-22-2017, 10:45 PM Go to last post
  47. How to organize Multilevel Model in R

    Hello, I am currently running an experiment where we measure escape latency and seeing if the presence of a drug has an effect on this. Each rat...

    Started by atamalu‎, 03-22-2017 10:40 PM
    • Replies: 0
    • Views: 318
    03-22-2017, 10:40 PM Go to last post
  48. Two-way MANOVA

    Hi, how do I fully follow up this MANOVA, please??? 2 IVs: Exposure Therapy (2 levels: control, or virtual reality) and Medication (2 levels:...

    Started by Quickquez‎, 03-22-2017 04:02 PM
    follow-up, manova, two-way
    • Replies: 0
    • Views: 227
    03-22-2017, 04:02 PM Go to last post
  49. Which ANOVA to use

    I have 20 subjects who are all presented with 12 pictures. These 12 pictures are split into 4 categories: Big Inanimate, Big Animate, Small...

    Started by rachel_joke‎, 03-21-2017 01:29 PM
    • Replies: 2
    • Views: 331
    03-22-2017, 06:04 AM Go to last post
  50. Help finding a term used in validity - psychometric testing

    A colleague has asked me for help with the name of a recognised situation whereby truncated information (e.g. a short questionnaire) is used to...

    Started by VBee‎, 03-15-2017 10:04 AM
    • Replies: 10
    • Views: 727
    03-22-2017, 04:22 AM Go to last post
  51. Likert scale data -can I use paired t-test? What about normality testing?

    Hey all! I have read many contradicting manuals and advice, so I decided to ask the best experts –you guys :) I have data from 40 subjects. I...

    Started by Labestia‎, 03-16-2017 01:10 PM
    likert, likert scale, normality, t test
    • Replies: 6
    • Views: 730
    03-19-2017, 05:19 PM Go to last post
  52. Interaction follow-ups

    Hi! I have ran a 2x2x2 ANOVA (B-W-W). There was no 3-way interaction, but there was a 2-way interaction for my 2 within-subjects factors. I'm a...

    Started by fffrost‎, 03-19-2017 09:47 AM
    • Replies: 0
    • Views: 303
    03-19-2017, 09:47 AM Go to last post
  53. MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV) (both n=...

    Started by K_T‎, 03-17-2017 01:25 PM
    assumptions, heterogeneity, mancova, manova, regression slopes
    • Replies: 0
    • Views: 251
    03-17-2017, 01:25 PM Go to last post
  54. Smile MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several Likert scale type questions: DV) for refugees (n=100) and...

    Started by K_T‎, 03-17-2017 12:11 PM
    assumptions, heterogeneity, mancova, manova, regression slopes
    • Replies: 0
    • Views: 181
    03-17-2017, 12:11 PM Go to last post
  55. What are the limitations to feeling thermometers?

    Hi there, I received the following comment from a reviewer and am a bit stuck on how I should answer: The comment is referring to our use...

    Started by jm2209‎, 03-16-2017 03:18 PM
    • Replies: 2
    • Views: 420
    03-16-2017, 03:52 PM Go to last post
  56. Green's scaling analysis of 3 items

    I'm doing a study on helping behaviour in toddlers, trying to see if the three forms of helping I've measured are scalable. I'm using Green's...

    Started by JessR‎, 03-14-2017 09:03 PM
    • Replies: 0
    • Views: 340
    03-14-2017, 09:03 PM Go to last post
  57. Does it make sense to conduct a Hierarchical Principal Compomnent Analysis (PCA)?

    So I have twelve variables that theoretically belong to the same dimension and I want do reduce them to one single item. A hierarchical factor...

    Started by favoone‎, 03-07-2017 12:24 PM
    factor analysis, hierarchical method, principal component
    • Replies: 1
    • Views: 620
    03-13-2017, 08:56 AM Go to last post
  58. Which test to use?

    I have to analyze a within-subject experiment with a continuous dependent variable and a categorical dependent variable (brain stimulation: Anode,...

    Started by mathieu‎, 03-10-2017 10:36 AM
    ancova, anova, covariate
    • Replies: 1
    • Views: 388
    03-13-2017, 08:53 AM Go to last post
  59. Assumptions of Bonferroni correction

    Hi everyone, I recently learned that the Bonferroni correction assumes that all of the hypothesis tests we're conducting on the same data are...

    Started by myautumn28‎, 03-10-2017 05:18 PM
    • Replies: 3
    • Views: 593
    03-13-2017, 08:52 AM Go to last post
  60. how to calculate ICC for sample of 10 with two assessor

    i have two assessors rating on picture cue . SME rateds each stories respective to picture in TAT like test with rating on likert 5 point scale from...

    Started by Dr.A.Suresh‎, 03-13-2017 02:22 AM
    icc for sample (n=10)
    • Replies: 1
    • Views: 424
    03-13-2017, 08:49 AM Go to last post

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