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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: 32,202
    11-10-2005, 12:21 AM Go to last post
  1. Regression analysis with 30 independent variables, HELP?

    Hi! I'm studying for a master's degree in Sociology and am doing my master thesis this year. I'm doing research for a Human Resource Management...

    Started by DanielleB‎, 12-20-2011 04:43 PM
    4 Pages
    1 2 3 ... 4
    independent variables, regression analysis
    • Replies: 53
    • Views: 9,310
    12-21-2011, 05:17 PM Go to last post
  2. [SOLVED] Guidance on HLM/multilevel modeling

    I've decided I need to know multilevel modeling; no way around it in educational research. I can't take the class at the U because it's offered bi...

    Started by trinker‎, 02-17-2012 04:29 PM
    4 Pages
    1 2 3 ... 4
    hlm, multilevel model
    • Replies: 50
    • Views: 13,731
    07-05-2012, 04:24 PM Go to last post
  3. Queries regarding ANCOVA and MANCOVA

    In a pre-post test experimental study having 3x2 factorial design, there are: 1. two independent variables: (a) teaching methods (3...

    Started by statanx‎, 09-07-2012 02:26 AM
    3 Pages
    1 2 3
    • Replies: 42
    • Views: 14,951
    06-24-2014, 11:13 AM Go to last post
  4. SEM with categorical variable/parceling/how to enter in AMOS?

    I need to do an SEM and I'm stumped about what to do with one of my variables, which is a nominal categorical variable (previous experience in x vs....

    Started by buntington‎, 04-14-2014 02:56 PM
    3 Pages
    1 2 3
    sem
    • Replies: 32
    • Views: 19,633
    09-07-2015, 06:00 AM Go to last post
  5. Is the intragroup correlation to be used instead of or alongside power analysis?

    Hello, I am doing a literature review for my mental health nursing dissertation. It is on the effects of Mindfulness-based-cognitive-therapy...

    Started by 11jono11‎, 01-29-2011 09:24 AM
    3 Pages
    1 2 3
    • Replies: 31
    • Views: 10,624
    02-19-2011, 12:57 PM Go to last post
  6. How often is the null hypothesis true in psychology?

    Hullo all, Something that I'm really interested in is the question of what should be the "default" form of statistical analysis used by everyday...

    Started by CowboyBear‎, 04-17-2016 12:08 AM
    2 Pages
    1 2
    • Replies: 29
    • Views: 5,401
    06-08-2016, 09:30 PM Go to last post
  7. how to do a contrast analysis for an interaction between two within subjects effects?

    Hello! I have a quite simple data pattern but find it hard to test a specific contrast I expected. I have 2 within subjects factors, each with two...

    Started by marie‎, 01-10-2012 04:40 PM
    2 Pages
    1 2
    contrast analysis, interaction, manova, repeated measures anova
    • Replies: 27
    • Views: 12,312
    06-01-2015, 05:45 PM Go to last post
  8. Likert scale analysis - ordinal or interval??

    Hi, I would appreciate some help so much as I feel I am going round in circles with every journal article I read! So I am currently trying to...

    Started by indie92‎, 04-21-2016 01:35 PM
    2 Pages
    1 2
    lickert, t-test
    • Replies: 26
    • Views: 3,590
    04-26-2016, 06:31 PM Go to last post
  9. Which test to run?

    I have been getting conflicting results from a few people on what test to use, so please let me know what you think. The design: We have 3...

    Started by atamalu‎, 02-14-2017 07:51 PM
    2 Pages
    1 2
    • Replies: 26
    • Views: 4,228
    02-25-2017, 04:40 PM Go to last post
  10. 2X3 Anova: Interac is marg sig (p = .08) do I proceed to post hoc or increase power?!

    I am in a very frustrating place, so I would appreciate any help/brainstorming that you can muster! I am conducting analyses related to a...

    Started by Jamie Farquhar‎, 08-29-2011 04:32 PM
    2 Pages
    1 2
    marginal significance, two-way a
    • Replies: 23
    • Views: 9,867
    08-31-2011, 12:05 PM Go to last post
  11. Can I say: the data is "almost normally distributed?"

    hello experts, I have data from a questionnaire, in particular musicians spending time on specific music related tasks per week. I calculated a...

    Started by Lehmann‎, 02-20-2013 03:33 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 5,382
    02-25-2013, 06:06 PM Go to last post
  12. MSC Project

    Iam doing a project looking at two ways to scan a knee and comparing them against surgery they had prior to the scans however it is only in patients...

    Started by jill‎, 09-10-2005 09:49 AM
    2 Pages
    1 2
    • Replies: 22
    • Views: 7,351
    11-18-2005, 07:37 PM Go to last post
  13. 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: 6,430
    06-15-2016, 06:34 PM Go to last post
  14. Finding somethinig significantly SIMILAR?

    I am carrying out a research project where particpants have viewed one of two messages (between subjects design) and the aim of the study is to look...

    Started by JB89‎, 02-23-2012 10:26 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 8,457
    02-24-2012, 05:15 PM Go to last post
  15. Confirmatory factor analysis - MAJOR CONFUSION!!!

    Good afternoon, I'm conducting a study that is evaluating the staff agreement levels when deciding patient attachment styles. Staff were given a...

    Started by aquabunny101‎, 02-27-2013 10:12 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 3,467
    02-28-2013, 03:52 PM Go to last post
  16. Meta Analysis - Correlation Coefficients with only M and SD

    Hi Folks, I'm am currently assisting on a Meta-Analysis and we are currently faced with correlating variables without the raw scores. The question...

    Started by cabrown89‎, 11-03-2013 11:28 AM
    2 Pages
    1 2
    correlation, meta analysis
    • Replies: 21
    • Views: 4,375
    11-08-2013, 10:37 AM Go to last post
  17. 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: 40,070
    10-24-2016, 04:47 PM Go to last post
  18. Chi-square Vs. Fisher's exact test (FET)

    I'd really like to have a statistician answer this because I cannot find the answer anywhere. Perhaps you could be kind enough to direct me towards...

    Started by helpwithstats‎, 06-03-2008 02:42 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 108,543
    07-16-2014, 10:01 PM Go to last post
  19. SEM - Comparing Models with Different Variables

    I am doing some structural equation modeling. I have made one model with 3 exogenous variables predicting 5 endogenous variables and would like to...

    Started by xralphyx‎, 01-31-2013 10:55 AM
    2 Pages
    1 2
    sem fit indices ecvi
    • Replies: 20
    • Views: 10,101
    09-23-2014, 06:58 PM Go to last post
  20. Trouble Transforming Data to Normality

    Hi All, I am trying to transform a variable to normality, but it does not seem to take! Below is the distribution: Clearly there is a...

    Started by herwitz‎, 05-15-2014 11:47 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 4,374
    05-16-2014, 03:30 AM Go to last post
  21. is this method viable or not?

    Hello all: First, a disclaimer: I am NOT a statistician, as will become painfully clear in just a minute, I'm afraid. :o My husband (an...

    Started by psuarez‎, 02-09-2010 08:06 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 5,522
    02-13-2010, 02:55 PM Go to last post
  22. Help with the level of measurement for correct/incorrect answers

    Please, help bring in some lucidity and fill in any possible gaps in my reasoning. The research assessed the participants' recall of a narrative...

    Started by Billy the Poet‎, 09-01-2015 06:04 PM
    2 Pages
    1 2
    categorical, dichotomous, level of measurement, logit
    • Replies: 17
    • Views: 8,545
    09-04-2015, 03:27 PM Go to last post
  23. Which correlation technique to use?

    Hi all, I am doing a research on workers and musculoskeletal disorders (MSD). One of the areas I am looking into is correlation between: 1. Age ...

    Started by emilyling‎, 06-09-2010 03:22 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 12,674
    07-04-2010, 01:34 AM Go to last post
  24. Confused with parametric or non-parametric test

    Hi, I have a question which I have tried to solve for a while but still feel confused. I hope someone can give me a hint, so I would know how to...

    Started by Crossover‎, 10-13-2010 12:54 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 12,618
    10-19-2010, 03:41 AM Go to last post
  25. Likert scale, parametric or nonparametric?

    Hello, first post here. I apologize if it is a stupid question (but then again, that'll make it easier to answer:)) I am training to be a...

    Started by 11jono11‎, 12-11-2010 10:02 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 26,299
    04-13-2013, 06:43 PM Go to last post
  26. Regarding choice of statistical analysis - bystander effect

    Hey there!, I'm having problems figuring out which test in SPSS I should run in regards to my study. My hypothesis is: 1) the more people present...

    Started by andy_nor91‎, 12-08-2011 12:41 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 6,401
    12-09-2011, 05:11 PM Go to last post
  27. nonparametric alternative to independent t test when DV is ordinal and heterogeneous

    Hi there, I've tried everything I can think of to determine the correct test but there always seems to be aproblem. In brief, I have 2 groups of...

    Started by clomur‎, 08-09-2012 03:48 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 6,433
    08-10-2012, 06:54 PM Go to last post
  28. Statistical analysis

    Hi there I'm a student doing a dissertation about the influence of reward satisfaction on turnover intention. At the moment I'm wondering how to...

    Started by Hypnoz‎, 02-05-2017 02:29 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 5,164
    03-09-2017, 12:18 PM Go to last post
  29. Smile Need some help calculating standard error of multiple regression coefficients

    Hello. I am an undergrad student not very familiar with advanced statistics. Thus, I figured someone on this forum could help me in this regard: ...

    Started by joseph.ej‎, 07-21-2008 06:52 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 81,398
    09-09-2010, 05:05 PM Go to last post
  30. A person says he or she can cast spells and bring his/her clients fame and fortune

    What are the practical details of the simplest go/no-go test that can be run to show this to be patently false or to have actually some truth to it?

    Started by Outlier‎, 06-19-2011 12:08 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,157
    06-28-2011, 08:18 PM Go to last post
  31. Correlation - NEED HELP ASAP!

    Hello. I am working on this problem for my stats class and am stuck! I tried googling, using my textbook and notes and I can't seem to find the right...

    Started by ralyousef‎, 10-09-2011 03:55 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,202
    10-09-2011, 07:18 PM Go to last post
  32. Does Standard Error of Measure change when new data points are obatained?

    I am a psychologist with a client who has taken 3 different IQ tests over the years and it is essential that I detemine the "true" IQ for this...

    Started by Curtis Vincent‎, 10-18-2012 06:25 PM
    2 Pages
    1 2
    3 sems, iq scores
    • Replies: 15
    • Views: 3,562
    11-04-2012, 08:46 PM Go to last post
  33. Urgent: ANCOVA Analysis for Nested Design

    In an experimental study, 210 students were randomly assigned into 6 sections, out of which 2 sections were treated as experimental group 1 subjected...

    Started by statanx‎, 01-16-2013 03:56 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 6,350
    01-18-2013, 09:52 AM Go to last post
  34. Logistic regression

    Dear everybody, I need some help with logistic regression. I'm trying to predict likelihood of consuming psychoactive drugs and practicing risk...

    Started by skraljev‎, 08-01-2014 08:09 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 4,498
    08-01-2014, 03:45 PM Go to last post
  35. 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: 2,741
    05-05-2017, 05:55 AM Go to last post
  36. Test Choice PLEASE HELP

    hello, i need to choose the correct test for my data analysis. i have a species of bacteria that i subjected to 60 seconds of uv lgiht and 90...

    Started by nd22121‎, 01-28-2009 06:00 PM
    • Replies: 14
    • Views: 3,520
    01-28-2009, 11:10 PM Go to last post
  37. Biology grad student needs help with data analysis

    Hi all, I’m a grad student who is studying Carolina wrens, a relatively common songbird in the southeastern U.S. I’ve run into a wall on my...

    Started by Shannon‎, 11-27-2009 08:24 PM
    • Replies: 14
    • Views: 4,982
    12-01-2009, 11:03 AM Go to last post
  38. cell size for multifactorial ANOVA

    Hello, I wonder if I could get help with this. I am analyzing data on scores from a psychosocial development assessment on young children,...

    Started by Mary_Anne‎, 04-15-2011 09:47 AM
    anova, sample size
    • Replies: 14
    • Views: 10,465
    04-20-2011, 11:20 PM Go to last post
  39. Question Making sure this is okay (t-test, ANOVA, regression)

    design: single group pre-test post-test measurement: self-report. we used 6 composite scores Initial sample size: 60ish drop out: 21-24%...

    Started by Fulanito de Tal‎, 02-23-2012 03:52 PM
    • Replies: 14
    • Views: 3,748
    03-02-2012, 02:27 PM Go to last post
  40. Cronbach Alpha for 3-item scale

    I've read that cronbach alphas are also dependent on the number of items, and for a scale meant only for descriptive purposes, what is the acceptable...

    Started by Danica Blanche‎, 10-12-2013 04:36 PM
    alpha, scale development
    • Replies: 14
    • Views: 11,696
    10-13-2013, 04:34 PM Go to last post
  41. which test is appropriate to find 'link'?

    Hi I don't know how to solve an assignment. I have been staring at it for hours. Am not sure if I need to find correlation or if I should demonstrate...

    Started by therigidrook‎, 11-12-2013 04:23 AM
    • Replies: 14
    • Views: 4,449
    11-18-2013, 08:43 AM Go to last post
  42. Quick Cronbach's Alpha Question

    Hi all, This may seem like a silly question, but I was wondering if I should remove outliers prior to running reliability analysis or run the...

    Started by Aegislash‎, 02-27-2017 05:32 AM
    cronbach's alpha, outliers, reliability
    • Replies: 14
    • Views: 3,033
    03-03-2017, 02:16 AM Go to last post
  43. Help in Levene's test, Please

    Hi, I did an experiment, studying on the effects of types of sugar and their concentrations on milk spoilage. The sugars I was using are sucrose,...

    Started by bom_bomkung‎, 11-30-2006 09:51 PM
    • Replies: 13
    • Views: 38,941
    11-25-2015, 03:39 PM Go to last post
  44. need help setting this up for work..

    I need help setting up an experiment for work. As a part enters production, certain dimensions get measured at different locations. The same...

    Started by needhelp123‎, 07-12-2007 12:43 PM
    • Replies: 13
    • Views: 4,989
    07-31-2007, 03:10 PM Go to last post
  45. How to test for goodness of fit?

    Hi, this is my first post! I've run into a little proplem with a project I'm doing. I'll briefly outline the project. I need to 'smooth' a...

    Started by Niste‎, 07-15-2009 03:53 AM
    • Replies: 13
    • Views: 6,484
    07-22-2009, 03:42 AM Go to last post
  46. (Urgent) Missing Data- Missed completely one item throughout the study

    Hello Everyone, I ve been encounter one serious issue of missing data for my research. That is, i found one i forgot include one item in my...

    Started by iopkl88‎, 04-11-2012 05:17 AM
    • Replies: 13
    • Views: 2,664
    04-16-2012, 02:49 AM Go to last post
  47. Which Analysis method to choose?

    According to the literature, imagining a contact situation with an out-group member increases your positive attitude toward those out-group members....

    Started by fayyazcivil‎, 10-17-2013 11:37 AM
    • Replies: 13
    • Views: 2,882
    10-17-2013, 04:26 PM Go to last post
  48. Please help! Running ANOVA with skewed data in some conditions

    Hi there, I really hope you can help. I've been looking on a number of forums and have had no luck. Also have been looking through some of the...

    Started by ninja‎, 11-06-2014 03:25 PM
    anova, log10, residuals non-normal, transformations
    • Replies: 13
    • Views: 4,610
    11-16-2014, 04:31 PM Go to last post
  49. Bonferroni Adjustment/Correction and Confidence Intervals

    Hello, I have two questions here. RESOLVED (for now): You perform the bonferroni for multiple tests and/or multiple comparisons. FIRST: I...

    Started by Jake-Finn‎, 05-14-2015 09:39 AM
    bonferroni
    • Replies: 13
    • Views: 5,368
    05-25-2015, 12:23 PM Go to last post
  50. Dichotomizing continuous variables for an EXPERIMENT not a survey

    I am aware of the many issues/pitfalls with splitting continuous variables in survey research. Nothing I have read addresses whether doing so to...

    Started by Curley‎, 06-08-2015 11:50 AM
    binning, dichotomizing variables, experiment design
    • Replies: 13
    • Views: 2,360
    08-04-2015, 05:13 PM Go to last post
  51. Question Let me know a better analysis method?

    I have two IVs; "collection method" (online and classroom) and "culture" (A and B), one continuous variable ("Age") and 8 DVs (well-being variables...

    Started by joonha35‎, 06-14-2017 08:55 PM
    group differences, t-tests
    • Replies: 13
    • Views: 1,316
    06-24-2017, 12:55 AM Go to last post
  52. statistics help

    hi guys im currently doing a phd in immunology but kinda helpless and hopless when it comes to stats. is there anyone who can chat to me about which...

    Started by hana-‎, 11-30-2005 05:36 AM
    • Replies: 12
    • Views: 3,897
    11-30-2005, 05:17 PM Go to last post
  53. Normal distribution in Linear regression

    I am doing a linear regression where the dependent variable lies between 0 and 1. Can I assume normality of errors under this circumstances? I...

    Started by bs0409‎, 02-15-2010 05:25 AM
    • Replies: 12
    • Views: 7,873
    02-20-2010, 09:54 AM Go to last post
  54. Comparing Regression Coefficients between Two Models

    I am running two regressions, each with the same independent variables but with two different dependent variables. Y = b1 + b2*X + b3*C (1) Z =...

    Started by Mike78‎, 06-11-2010 06:18 PM
    • Replies: 12
    • Views: 27,918
    06-08-2012, 06:02 AM Go to last post
  55. How to enter ordinal data into SPSS?

    Hi I just wanted to know if there is supposed to be a different way to enter ordinal data, I have never done this before!

    Started by Preeti21‎, 04-12-2011 11:46 PM
    • Replies: 12
    • Views: 18,687
    02-06-2014, 10:31 PM Go to last post
  56. Post Hoc Analysis Question

    New to this site but glad I found it. I have real issues with stats and need some help. I'm conducting a study where I'm looking at black-white...

    Started by Shadow21‎, 10-11-2011 09:55 AM
    • Replies: 12
    • Views: 4,673
    10-12-2011, 06:00 PM Go to last post
  57. Experimental data analysis - some questions regarding variables and applicable tests

    Hello, I am currently working on my thesis which attempts to investigate whether a specific training course (study skills) has an effect or not. ...

    Started by MavH‎, 04-07-2012 10:59 AM
    • Replies: 12
    • Views: 3,640
    04-14-2012, 08:19 PM Go to last post
  58. Confused about causality

    I'm helping a colleague of mine with his homework for his political science master. He's investigating the effect of political orientation on support...

    Started by Junes‎, 06-18-2013 01:44 PM
    causality
    • Replies: 12
    • Views: 4,249
    06-21-2013, 10:35 AM Go to last post
  59. Ranges in survey questions

    I am working on some survey research. One of the questions is something like... This is how the colleague phrased the question but I know...

    Started by trinker‎, 09-02-2013 10:14 AM
    • Replies: 12
    • Views: 3,346
    09-02-2013, 05:45 PM Go to last post
  60. SEM - total variance explained by model?

    Question #1: Is there any way to calculate the total amount of variance explained by an SEM model? My committee seems to think there is and they...

    Started by buntington‎, 06-15-2014 09:13 AM
    • Replies: 12
    • Views: 10,317
    06-17-2014, 01:50 AM Go to last post

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