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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: 31,392
    11-10-2005, 12:21 AM Go to last post
  1. type one error adjustment - Friedman test Wilcoxon post hoc

    Hello, I assessed reading competence with 5 different tasks (U1 - U5) three times (t1, t2, t3). This is how I proceeded so far to test for...

    Started by Marsali‎, 07-06-2014 05:37 PM
    • Replies: 0
    • Views: 1,381
    07-06-2014, 05:37 PM Go to last post
  2. multiple imputation in SPSS - how to pool the results (Friedman test)

    Good morning, I used Multiple imputation to get estimates for missings in a repeated measures design. I want to know about the sensitivity of a...

    Started by Marsali‎, 07-02-2014 03:40 AM
    • Replies: 2
    • Views: 5,704
    07-02-2014, 05:54 AM Go to last post
  3. Nominal covariate in RM ANOVA

    Hi there, I'm running a mixed ANOVA with repeated measures; with condition (control, intervention) and time (pre-test, post-test) as...

    Started by Veerle‎, 07-02-2014 05:07 AM
    • Replies: 0
    • Views: 1,434
    07-02-2014, 05:07 AM Go to last post
  4. Correlations in one group

    Hi, 1. purpose of the study / research question / hypotheses - I'm conducting a study about Physical Courage among veterans (that is why people...

    Started by urikugel‎, 07-01-2014 03:54 PM
    • Replies: 3
    • Views: 1,834
    07-02-2014, 01:59 AM Go to last post
  5. beginning of r

    Good morning to all, I need a step by step explaination of how to enter the data in r. I realized only that I have to create a world file where I...

    Started by cate‎, 07-01-2014 02:13 PM
    • Replies: 0
    • Views: 1,317
    07-01-2014, 02:13 PM Go to last post
  6. meta-analysis with different IV and DV?

    Hi all, I'm trying to help a colleague of mine with figuring out whether a meta-analysis might make sense. I don't know much about meta-analysis,...

    Started by Junes‎, 07-01-2014 10:23 AM
    • Replies: 0
    • Views: 3,089
    07-01-2014, 10:23 AM Go to last post
  7. Post comparing and accounting for temperature difference between two locations

    Hi, I'm a student currently undertaking my dissertation. The aim of my research is to try to gain an understanding of what informs people's...

    Started by RedAlice‎, 07-01-2014 10:00 AM
    comparison, t-test, temperature
    • Replies: 0
    • Views: 1,068
    07-01-2014, 10:00 AM Go to last post
  8. Why do means&error bars in an ANOVA graph depend on its factors and covariates?

    Hi all, I have a mixed-model design with between-subjects factors Group (treatment, control) and Difficulty (easy, hard), and within-subjects...

    Started by wildetudor‎, 06-29-2014 12:47 PM
    • Replies: 0
    • Views: 1,083
    06-29-2014, 12:47 PM Go to last post
  9. Need help with missing values

    Participants completed 2 questionnaires at Time 1, and each questionnaire is being scored for empathy. Because of recording issues, I do not have an...

    Started by Yael‎, 06-29-2014 12:08 PM
    imputation, missing values
    • Replies: 0
    • Views: 1,175
    06-29-2014, 12:08 PM Go to last post
  10. Scores derived from variance specific for a factor

    Hi, I received a cooment from one of the reviewer but I do not understand what I should do. Here is short explanation of the study: This study...

    Started by arts‎, 06-25-2014 01:35 PM
    factor analysis
    • Replies: 5
    • Views: 2,021
    06-29-2014, 06:29 AM Go to last post
  11. Mediation analysis (Baron and Kenny)

    Hey, I have some problems concerning the analysis of a mediation model. If you guys could give me some tips that would be great! :) First of...

    Started by stl111‎, 06-27-2014 05:43 PM
    • Replies: 2
    • Views: 2,906
    06-28-2014, 01:21 PM Go to last post
  12. Testing interaction between measures which are in different units

    Hi, I have within-subject design (each subject came twice). One of the visits contained manipulation and another was a placebo. For each...

    Started by john.gelburg‎, 06-28-2014 06:02 AM
    • Replies: 0
    • Views: 1,154
    06-28-2014, 06:02 AM Go to last post
  13. I am terrible at statistics and need help regarding which analysis to choose

    Hi everyone, As my title states; statistics have always been very difficult for me. My teacher asked me to think about what analyses she could...

    Started by vanillaangel‎, 06-26-2014 03:30 PM
    • Replies: 5
    • Views: 1,840
    06-27-2014, 11:38 AM Go to last post
  14. Comparing exp and control groups in a mixed design with a comparatively small N

    My study investigates the type of dialogue and behavior between children working in groups on a class activity, with and without an intervention. It...

    Started by rsm‎, 06-26-2014 01:29 AM
    experimental, mixed anova, multiple datasets
    • Replies: 0
    • Views: 1,486
    06-26-2014, 01:29 AM Go to last post
  15. 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: 14,295
    06-24-2014, 11:13 AM Go to last post
  16. interpreting multi-level logit model

    Hi, I have this output from Stata (an explanation of the variables follows). As far as I understand, the policyfoundation coefficient is...

    Started by winnie1825‎, 06-24-2014 09:32 AM
    logistic multilevel
    • Replies: 0
    • Views: 2,059
    06-24-2014, 09:32 AM Go to last post
  17. paired sample t-test for repeated measures in 1 subject

    I am conducting a psychology experiment. In my pilot study I analyze responses of one subject which ran through two conditions. The task is to...

    Started by Monstera‎, 06-23-2014 02:18 AM
    dependent, independent sample t-test, paired, t-test
    • Replies: 9
    • Views: 2,546
    06-23-2014, 05:51 AM Go to last post
  18. Low Cronbachs alpha when using a standardised measure- how do I explain this?

    Hi, for my thesis I conducted cronbachs alpha on several measures- the core questionnaire is the Five Facet Mindfulness Questionnaire (FFMQ). My...

    Started by MJag‎, 06-22-2014 07:39 AM
    • Replies: 3
    • Views: 1,634
    06-22-2014, 01:38 PM Go to last post
  19. How to analyze a variable measured on a Likert scale and its interaction with another

    I have to analyze this variable which consists of scores given to 3 items (1-9 scale). This "likert scale" measures "brand commitment" if thats...

    Started by Stefan Stefanov‎, 06-17-2014 07:31 AM
    interaction, method, spss
    • Replies: 1
    • Views: 1,238
    06-17-2014, 08:20 AM Go to last post
  20. 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: 9,609
    06-17-2014, 01:50 AM Go to last post
  21. Violating ANCOVA "Homogeneity of Regression of Slopes"

    Hi all, I am working on a publication where I ran a 3-way mixed design ANCOVA. For one of my between-subjects IVs (gender) I found a significant...

    Started by TaylorOliver4‎, 06-16-2014 06:29 PM
    • Replies: 0
    • Views: 2,929
    06-16-2014, 06:29 PM Go to last post
  22. Interrater Reliability. Is MORE better?

    Which design is more powerful: testing interrater reliability with 2 judges or 4 judges? (citations appreciated)

    Started by bitor‎, 06-16-2014 12:47 PM
    interrater reliability, psychology, reliability
    • Replies: 3
    • Views: 1,853
    06-16-2014, 01:37 PM Go to last post
  23. Interaction effect not significant, but graph indicates otherwise...

    For my thesis I had two hypotheses regarding moderator/interaction effects: h1: Exisiting game experience (dependent, continous) moderates the...

    Started by rigest‎, 06-14-2014 03:21 PM
    • Replies: 8
    • Views: 2,782
    06-15-2014, 01:44 AM Go to last post
  24. Principal component analysis - problems with input data

    Hello everyone. As the title suggests, I have a problem with figuring out what data exactly to feed my PCA. The situation: I have a certain number...

    Started by PCAquestion‎, 06-14-2014 04:40 PM
    • Replies: 0
    • Views: 1,356
    06-14-2014, 04:40 PM Go to last post
  25. Analysis question

    My analysis is a 2 X 2 , looking at the influence of gender (male, female) & SES (middle class, poor) of a job candidate on how he is evaluated for a...

    Started by norajones‎, 06-14-2014 02:27 PM
    • Replies: 0
    • Views: 1,247
    06-14-2014, 02:27 PM Go to last post
  26. inter-rater reliability with multiple raters on spss statistics

    Hi everyone! I need help with a research assignment. I'm new to IBM SPSS statistics, and actually statistics in general, so i'm pretty overwhelmed. ...

    Started by redeyedfrog‎, 06-13-2014 10:36 PM
    • Replies: 0
    • Views: 3,426
    06-13-2014, 10:36 PM Go to last post
  27. Determining the right statistical test

    Please delete the thread :)

    Started by aviamo‎, 06-12-2014 12:10 PM
    • Replies: 0
    • Views: 1,552
    06-12-2014, 12:10 PM Go to last post
  28. Experiment design

    Hi I am designing an experiment for school and I don't know how best to describe the factorial design. I have three conditions, and I will be...

    Started by Shawnus‎, 06-01-2014 07:56 AM
    • Replies: 3
    • Views: 1,558
    06-12-2014, 10:16 AM Go to last post
  29. statistical symbols in microsoft word

    I've spent like 5 hours trying to figure out how to insert a bar (called overstrike or overline) over a word ... like the bar that goes over x for...

    Started by lissiemait‎, 06-07-2014 11:17 PM
    microsoft word, overstrike, statistics, symbols, word
    • Replies: 5
    • Views: 4,337
    06-09-2014, 11:33 PM Go to last post
  30. How to analyse..?

    Hi, I have a problem to choose a method for analysing data from my experiment. I have one within-subjects (all four stimuli presented to every...

    Started by registerStat‎, 06-06-2014 07:03 PM
    • Replies: 0
    • Views: 1,311
    06-06-2014, 07:03 PM Go to last post
  31. Cool Preacher&Hayes Process macro

    Hello friends! We are interested in the relationship of x on y, mediated by m. All variables are dichotomous except for x, which is continuous....

    Started by Psychstat‎, 06-06-2014 01:01 PM
    • Replies: 1
    • Views: 2,878
    06-06-2014, 04:10 PM Go to last post
  32. Could really use some advice for my thesis!

    So I'm almost done with my thesis but I'm struggling with my last hypothesis. Some background information on my subject: I'm trying to find out what...

    Started by rigest‎, 06-06-2014 04:32 AM
    • Replies: 3
    • Views: 1,912
    06-06-2014, 06:26 AM Go to last post
  33. Nonparametric/Ranking Data Help!!

    Hi all, I am a PHD student attempting to come to grips with an analysis of some recent data. I have a repeated measures design. 220 students were...

    Started by kip_cheers‎, 06-03-2014 08:22 PM
    friedman test, nonparametric, rank, repeated measures
    • Replies: 0
    • Views: 1,404
    06-03-2014, 08:22 PM Go to last post
  34. Unhappy Sample size calculation for multiple regression

    Hi all! I am struggling with sample size calculations at the minute. I have looked everywhere but all I get is formulas. I have downloaded MedCalc...

    Started by Christie‎, 06-03-2014 04:58 PM
    correlation, multiple regression, power statistics, sample size calculation
    • Replies: 0
    • Views: 2,125
    06-03-2014, 04:58 PM Go to last post
  35. Autism behaviour - how to analyse data

    I'd like help how to use data on the behaviour of an autistic individual. In my work I'm taking care of an adult male with autism. He's in his...

    Started by therigidrook‎, 06-01-2014 01:51 PM
    • Replies: 2
    • Views: 1,571
    06-03-2014, 03:46 PM Go to last post
  36. Question: What type of experimental design do I have here?

    I feel a bit unsure and maybe you can help me. I've got the data of a big firm, where there is a population of 1400 administrative personnel...

    Started by womanfromthesea‎, 05-20-2014 03:49 PM
    • Replies: 5
    • Views: 1,758
    06-03-2014, 11:15 AM Go to last post
  37. How to analyze parents' talk when codes are not normal in a mixed design?

    This is a but tricky to explain, so I will do my best. I am trying to analyze coded talk by parents for three different categories of objects. I...

    Started by dsiegel06‎, 05-30-2014 05:40 PM
    mixed anova, non-parametric, parent talk
    • Replies: 1
    • Views: 1,334
    06-03-2014, 03:06 AM Go to last post
  38. HELP with experimental analysis (fear conditioning)

    I am running an olfactory fear conditioning procedure in which 2 odors (odor A/ odor B) are either paired with a footshock (CS+) or absence of...

    Started by jzunder‎, 05-29-2014 05:35 PM
    anova, mixed between anova, repeated measure anova, spss
    • Replies: 1
    • Views: 1,631
    06-02-2014, 07:02 AM Go to last post
  39. Not sure if i chose the correct statistical test to analyze data

    I'm trying to help a friend out with the statistics parts of her bachelors paper. Right now she is still the the planing stages and has not gathered...

    Started by hugstari‎, 05-30-2014 07:06 AM
    chi sq test, questionnaire, statistical design
    • Replies: 0
    • Views: 689
    05-30-2014, 07:06 AM Go to last post
  40. Condensed data vs. raw data. What analyses would be appropriate?

    Hello all, I am new to this forum and would greatly appreciate your help. I have two datasets: one dataset is from 1980 and only “processed”...

    Started by Daida‎, 05-29-2014 01:13 PM
    • Replies: 1
    • Views: 1,435
    05-29-2014, 01:48 PM Go to last post
  41. HELP understanding results and writing discusion

    can somebody help me !! I am going crazy haha The third hypothesis predicted that people in a happy mood were more likely to process information...

    Started by jpark‎, 05-29-2014 12:57 AM
    • Replies: 0
    • Views: 1,163
    05-29-2014, 12:57 AM Go to last post
  42. Cross-lagged panel size: sample size of 48

    I have performed a cross-lagged correlational study with 2 variables and 2 waves. My sample size is 48 subjects. Is it possible to perform it with...

    Started by Chr‎, 05-28-2014 12:34 AM
    correlation, cross-lagged, sample size
    • Replies: 0
    • Views: 1,497
    05-28-2014, 12:34 AM Go to last post
  43. Weighted Kappas...please help!

    Hello! I've looked all over regarding how to do this but am still coming up short. Please help! I have 16 data points. I have provided the weights!!...

    Started by rolliefngr7‎, 05-26-2014 05:00 PM
    cohen's kappa, statistical analysis, statistical computing, statistics help, weighted kappa
    • Replies: 0
    • Views: 949
    05-26-2014, 05:00 PM Go to last post
  44. What correlations to use for ANCOVA assumptions in a 2-group study?

    Hi all, I have a question regarding ANCOVA analyses. For my study, I am looking at between group differences on a memory measure that is made...

    Started by can_dodge_a_wrench‎, 05-26-2014 04:52 PM
    • Replies: 0
    • Views: 1,069
    05-26-2014, 04:52 PM Go to last post
  45. Assessing change using McNemar's test

    I have Pre and post-intervention test scores of a number of skills rated from 0-3 (0 = Poor, 1 = Fair, 2 = Average, 3 = Good) for 5 participants. I...

    Started by rsm‎, 05-24-2014 08:31 AM
    chi-square, mcnemar test, pre-post
    • Replies: 4
    • Views: 1,512
    05-24-2014, 04:41 PM Go to last post
  46. Inputting data from my questionnaires for my second year project!

    Hello there, I am really struggling with my second year project as I am clueless when it comes to SPSS. So now that i've collected all my...

    Started by Aggie93‎, 05-24-2014 01:19 PM
    data input
    • Replies: 1
    • Views: 1,202
    05-24-2014, 01:37 PM Go to last post
  47. Is it possible to correlate two latent variables in AMOSwhere one subsumes the other?

    Hi all, I suspect that you will think that this is a dumb question, but please bear with me: I am trying to correlate two latent variables using...

    Started by myautumn28‎, 05-21-2014 08:31 PM
    • Replies: 0
    • Views: 1,136
    05-21-2014, 08:31 PM Go to last post
  48. Significance changes when standardizing

    Hello guys, I ran some SEM analysis (with MPlus) which gives me some puzzling results: for some paths the significance level is highly different...

    Started by szidel‎, 05-19-2014 12:08 PM
    • Replies: 2
    • Views: 2,013
    05-19-2014, 01:53 PM Go to last post
  49. Modification Indices

    I am struggling with how to interpret some of the modification indices in AMOS SEM output and would appreciate any feedback you can offer! I have...

    Started by buntington‎, 05-17-2014 09:55 PM
    • Replies: 3
    • Views: 14,094
    05-18-2014, 04:09 PM Go to last post
  50. "contextual effect" vs. "compositional effect" in multilevel models

    Chatbox convo follows: 05/16 16:13 Jake: lazar / spunky: when people speak of "contextual effects" in the multilevel / ed psych literature, are...

    Started by Jake‎, 05-16-2014 05:43 PM
    • Replies: 2
    • Views: 9,013
    05-16-2014, 06:10 PM Go to last post
  51. Use factor weightings derived from previous work on new data?

    Hello all, I have tested people on a set of 12 cognitive tests that have been used in previous research (by other people, not me). In the previous...

    Started by jess13‎, 05-15-2014 10:55 AM
    • Replies: 6
    • Views: 1,737
    05-16-2014, 03:59 PM Go to last post
  52. 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: 4,091
    05-16-2014, 03:30 AM Go to last post
  53. Pretest - posttest analysis question

    I am assessing the learning outcomes for a psychology course using a 10-question multiple choice pretest and, later, the same 10 questions as a...

    Started by Sherrington‎, 05-15-2014 12:28 AM
    • Replies: 4
    • Views: 1,723
    05-15-2014, 07:36 PM Go to last post
  54. Repeated measures - correlation

    Hi, I've conducted a study in which my participants undergo 4 different manipulations (within-subjects): a negative mood, a positive mood, food...

    Started by Pebbles84‎, 05-09-2014 03:20 AM
    • Replies: 1
    • Views: 1,484
    05-14-2014, 09:00 AM Go to last post
  55. Cluster Analysis, Discriminant Analysis and Multinomial Logistic Regression - Help!

    Hi Everyone, I am having some serious problems with my analyses and was hoping someone might be able to help me out! I have a sample of 95...

    Started by mlb‎, 05-14-2014 08:35 AM
    cluster analysis, discriminant analysis, regression
    • Replies: 1
    • Views: 2,458
    05-14-2014, 08:58 AM Go to last post
  56. Question Within-subjects Error Bars and Normalization?

    Hello, I need to calculate within-subjects error bars to create a graph for my data but I'm having a hard time wrapping my head around how to do...

    Started by kw1130‎, 05-13-2014 01:34 PM
    • Replies: 0
    • Views: 3,521
    05-13-2014, 01:34 PM Go to last post
  57. ANOVA planned contrasts

    Dear TalkStats community, Previously a website (http://www4.uwsp.edu/psych/cw/statmanual/plancomp.html) was recommended to me on ANOVA and planned...

    Started by quert‎, 05-12-2014 10:57 AM
    anova, planned contrast
    • Replies: 0
    • Views: 1,471
    05-12-2014, 10:57 AM Go to last post
  58. Alternatives for logistic regression?

    Hey everyone! I need some help because I am not really happy with the data analysis for my thesis. I am investigating the prognostic power of...

    Started by Matte‎, 05-11-2014 09:23 AM
    chi-square test, logistic regression, prediction
    • Replies: 0
    • Views: 994
    05-11-2014, 09:23 AM Go to last post
  59. Resolving recoding issues for variables across time and space for a larger dataset

    For the paper I am working on I am claiming that as protester 'powerlessness' increases so does the likelihood of the protester selecting a...

    Started by ndo03001‎, 05-08-2014 09:58 PM
    • Replies: 0
    • Views: 1,053
    05-08-2014, 09:58 PM Go to last post
  60. Mediation/Moderation, entrepreneurship, health and work satisfaction

    Hi people! I'm currently working on my thesis in organizational psychology, and I could really use some help in the SPSS analysis. My thesis is...

    Started by Scotty‎, 05-02-2014 08:50 AM
    • Replies: 4
    • Views: 1,644
    05-07-2014, 06:38 AM Go to last post

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