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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: 27,527
    11-10-2005, 12:21 AM Go to last post
  1. Multiple Hypothesis For Chi Square Test of Independence

    For a class assignment my particular data set I chose is going to use a chi-square test of independence. My professor has said that everyone needs...

    Started by malcaris‎, 10-21-2013 10:13 PM
    • Replies: 0
    • Views: 787
    10-21-2013, 10:13 PM Go to last post
  2. Mixed Model ANOVA or MLM for small sample?

    Hi there! So I just recently finalized my dissertation analyses and sent them to my advisor, and (as this process goes) he is now "recommending"...

    Started by hms5001‎, 10-21-2013 02:50 PM
    dissertation, mixed model anova, multilevel modeling, pilot, sample size
    • Replies: 1
    • Views: 1,989
    10-21-2013, 02:59 PM Go to last post
  3. Several covariates in ANCOVA?

    I am running a study where I compare changes in brand attitudes across time for four brands, all within subjects. Between Time 1 and time 2,...

    Started by AlexD‎, 10-21-2013 12:38 PM
    ancova
    • Replies: 0
    • Views: 645
    10-21-2013, 12:38 PM Go to last post
  4. Repeated Measures, Manova etc.???

    Hi, I am really struggling to find a design that suits what I want to test for so would really appreciate some help :) Basically I have one IV,...

    Started by KimWP‎, 10-21-2013 10:55 AM
    repeated measures manova, research design
    • Replies: 0
    • Views: 620
    10-21-2013, 10:55 AM Go to last post
  5. Help with Dissertation

    Right now I am working on my dissertation. As of right now I have two groups(DBT and CBT) with their means calculated pre-experiment, 6mo follow...

    Started by malcaris‎, 10-20-2013 02:12 PM
    • Replies: 3
    • Views: 938
    10-20-2013, 03:42 PM Go to last post
  6. Analysing Likert Scale

    Hi, I am a bit stuck so was wondering if someone could help. For my dissertation I'm seeing whether those who run more than 3 miles a week are...

    Started by nickm926‎, 10-20-2013 11:43 AM
    • Replies: 3
    • Views: 704
    10-20-2013, 02:18 PM Go to last post
  7. Question Research Design…helping a beginner…

    Hi, I am new at this, but I am doing a study involving two different groups. One group consists of Art students and the other of Math students. Both...

    Started by WillHan‎, 10-19-2013 09:08 AM
    • Replies: 1
    • Views: 12,249
    10-20-2013, 03:40 AM Go to last post
  8. using neural network to make prediction

    Hi all, I've been using a multilayer perceptron to build a classifiacation model in SPSS, and just need some help or direction on how to use the...

    Started by TheTransporter‎, 10-18-2013 11:02 PM
    • Replies: 0
    • Views: 1,156
    10-18-2013, 11:02 PM Go to last post
  9. 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: 1,979
    10-17-2013, 04:26 PM Go to last post
  10. Chi-Square Help Please

    Hello, Everyone Right now I am doing my dissertation proposal for my PhD. I am doing my dissertation on recidivism rates in different types of...

    Started by malcaris‎, 10-16-2013 12:05 PM
    • Replies: 1
    • Views: 952
    10-17-2013, 01:49 AM Go to last post
  11. Need helping with Anova code !

    i'm new to forum. I must code Anova but now i don't know how to code it in C# , can anyone help me, my deadline is coming..

    Started by followtrinhtoi‎, 10-16-2013 11:39 AM
    • Replies: 0
    • Views: 791
    10-16-2013, 11:39 AM Go to last post
  12. multiple chi square tests

    i am hoping to get advice regarding whether it would be statistically valid/correct to run multiple chi square tests on a single sample, but for...

    Started by danielj‎, 10-15-2013 11:54 PM
    • Replies: 1
    • Views: 886
    10-16-2013, 08:09 AM Go to last post
  13. Unhappy Need help with these ANOVA questionsplease!!!

    If you can even help with any one of those it would be really helpful thanks! 1. An experimenter wants to test the effects of three types of...

    Started by cupcakegirl932‎, 10-15-2013 08:42 PM
    • Replies: 2
    • Views: 766
    10-15-2013, 08:53 PM Go to last post
  14. Unhappy Need help with a 2x2 between subjects design question please?

    My Professor has asked this for a question: Think of a suitable design with appropriate IV's and levels and construct a 2x2 between subjects design...

    Started by cupcakegirl932‎, 10-15-2013 08:47 PM
    • Replies: 0
    • Views: 764
    10-15-2013, 08:47 PM Go to last post
  15. How to use higher-order scale?

    Hello, I am currently working on the development and validation of a new scale. The process went well so far, and I ended up with a higher order...

    Started by szidel‎, 10-09-2013 02:17 AM
    higher-order, scale, validation
    • Replies: 2
    • Views: 1,569
    10-15-2013, 02:39 AM Go to last post
  16. 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: 7,109
    10-13-2013, 04:34 PM Go to last post
  17. Different Types of Mediation? What are the Criteria?

    I am trying to determine how to describe a particular mediation result from my SPSS PROCESS output. From my reading of Baron and Kenny (1986), and...

    Started by MuddyOx‎, 10-11-2013 07:37 PM
    • Replies: 1
    • Views: 1,740
    10-13-2013, 10:44 AM Go to last post
  18. small sample size

    For my mcs thesis I am testing 6 ex alcoholics of which: 2 have been sustained from alcohol 2-5 years, two have 6-10 years and two have 11-15 years...

    Started by charms‎, 10-10-2013 08:06 AM
    • Replies: 3
    • Views: 1,291
    10-11-2013, 05:41 PM Go to last post
  19. Moderated regression: Inconsistent results. Is it possible?

    I performed moderated multiple regression using SPSS. Total sample size was 800. My variables were as follows: - Outcome variable (Y: measured in...

    Started by 2345‎, 09-26-2013 01:47 AM
    • Replies: 1
    • Views: 905
    10-11-2013, 04:31 PM Go to last post
  20. Question Mixed Design ANOVA Linear Trends

    Hey, Data Set I have a relatively straight forward question. I have conducted a 2 x 8 mixed design anova which treats condition (2) as a...

    Started by Middle Pathway‎, 10-04-2013 02:06 AM
    • Replies: 1
    • Views: 770
    10-11-2013, 04:21 PM Go to last post
  21. Question Some help for moderation analysis in SPSS?

    Hey everybody! Im stuck with my psychology masters thesis. Im studying if narcissism and a level of education moderate peoples ability to evaluate...

    Started by jmmete‎, 10-09-2013 09:41 AM
    moderation, regression analysis
    • Replies: 1
    • Views: 1,338
    10-11-2013, 11:25 AM Go to last post
  22. heterogeneity measures (betwwen-subject variability)

    in a word association test, computing ADOM,NUR,NMR how can I use H statistic to compare distribution of responses of two groups? thanks.

    Started by nikta‎, 10-10-2013 10:05 AM
    • Replies: 0
    • Views: 667
    10-10-2013, 10:05 AM Go to last post
  23. SEM in AMOS, residual errors

    Hello everybody, I need to report on a paper a model tested through SEM analyses in AMOS graphic, In the figure referees asked me to report...

    Started by PsychoSport‎, 10-10-2013 08:16 AM
    amos, residuals, standard error, structural equation model
    • Replies: 0
    • Views: 3,106
    10-10-2013, 08:16 AM Go to last post
  24. Bayesian for dummies

    I saw this blog post: http://vasishth-statistics.blogspot.com/2013/10/new-course-on-bayesian-data-analysis.html And opened the notes on Bayesian...

    Started by trinker‎, 10-09-2013 08:51 AM
    • Replies: 0
    • Views: 1,687
    10-09-2013, 08:51 AM Go to last post
  25. Re-post: R, pwr: Proper test to determine multi-stage random sample size?

    Hello. Thanks for participating in this forum. I'm here to confirm or revise my plans for a multi-stage sample of an existing data set. ...

    Started by Binip‎, 10-08-2013 11:25 PM
    • Replies: 0
    • Views: 945
    10-08-2013, 11:25 PM Go to last post
  26. Eliminate effects of covariate for each item

    Hi, I hope that somebody can help me with my little stats problem in regard to my memory study. In my study, participants are tested for their...

    Started by Student1111‎, 10-08-2013 02:02 AM
    • Replies: 1
    • Views: 833
    10-08-2013, 08:34 PM Go to last post
  27. Interpreting time invariant covariate - repeated measures

    I conducted a 3 x 2 x 2 x 2 repeated measures ANOVA with 2 time invariant / between subjects covariates (research details below). While covariates...

    Started by RPS‎, 10-04-2013 07:14 PM
    • Replies: 0
    • Views: 1,584
    10-04-2013, 07:14 PM Go to last post
  28. Therapeutic Outcomes for a single group at 3 time points

    Hi, I would be very grateful for some advice because I am getting really confused! I have been collecting outcomes data (3 different...

    Started by AlexdPerry‎, 09-30-2013 06:17 AM
    anova, pre-post, single group, t-test
    • Replies: 1
    • Views: 953
    10-04-2013, 04:51 PM Go to last post
  29. Repeated measures ANOVA : problem with interpretation

    My repeted factor represents an effect of an antipsychotic drug on some quantitative variable measured in 5 time points. When that is the only factor...

    Started by Anchyboom‎, 10-04-2013 04:22 PM
    post hoc, repeated measures
    • Replies: 0
    • Views: 762
    10-04-2013, 04:22 PM Go to last post
  30. Unsure if what I am doing is OK... advice?

    Thanks I actually ended up doing something else. I just had to think things through.

    Started by eyeaye‎, 10-01-2013 03:47 PM
    • Replies: 1
    • Views: 775
    10-01-2013, 04:18 PM Go to last post
  31. post-hoc test after principal coordinate analysis

    Hello, I'm going to explore my dataset, composed by 100 subjects and 14 binary (1,0) variables. I was wondering if my protocol makes sense: ...

    Started by Marco777‎, 09-27-2013 06:30 AM
    binary data, discriminant analisys
    • Replies: 2
    • Views: 1,243
    09-27-2013, 10:18 AM Go to last post
  32. Three groups two linear regressions

    Hello friends,:wave: I am analyzing data that has three groups (type I treatment - the new treatment, type 2 treatment - is the "regular"...

    Started by Galit‎, 09-27-2013 05:31 AM
    • Replies: 0
    • Views: 710
    09-27-2013, 05:31 AM Go to last post
  33. Post-hoc Power, effect size for Chi-square

    I need help with my post-hoc power analysis, specifically the effect size: I measure children's successrate under four conditions. My dependent...

    Started by a_schaman‎, 09-25-2013 01:13 PM
    chi sq test, cohen's w, cramer's v, effect size, power
    • Replies: 0
    • Views: 2,645
    09-25-2013, 01:13 PM Go to last post
  34. Question About MANOVA (assumptions violated)

    Hi everyone, I am doing a research on demographical factors (e.g. family income, step family, gender etc.) and aggressiveness/delinquency of...

    Started by acchan‎, 09-22-2013 05:13 AM
    • Replies: 5
    • Views: 1,805
    09-24-2013, 02:43 AM Go to last post
  35. Research stats & power analysis

    Hi please could someone help as I am very confused and I'm sure the answer is very straight forwaard. I am doing a study looking at beliefs about...

    Started by Psy86‎, 09-16-2013 07:34 AM
    • Replies: 1
    • Views: 1,170
    09-24-2013, 01:09 AM Go to last post
  36. [SOLVED] Stats question..Please help!

    Need help with this question ASAP. It is very important. Fiona takes part in two different choice-reaction time tasks as part of her research...

    Started by AmJ‎, 09-23-2013 04:39 AM
    standard, statistics
    • Replies: 1
    • Views: 870
    09-23-2013, 06:12 AM Go to last post
  37. Singular correlation matrix problem

    I'm using principal components to reduce problem dimension. I obtain correlation matrix whose determinant is about 10^(-13) as the result of ...

    Started by kobylkinks‎, 08-04-2008 06:30 AM
    • Replies: 5
    • Views: 17,071
    09-20-2013, 12:46 AM Go to last post
  38. Interaction between two causally related IVs

    I am interested in studying an interaction effect of two variables that have been shown to have a causal relationship by previous research. I am...

    Started by hemivar‎, 09-15-2013 12:48 AM
    • Replies: 2
    • Views: 1,112
    09-16-2013, 12:13 PM Go to last post
  39. Help! Repeated Measures ANOVA SPSS

    Context of study: 32 participants completed a self-esteem questionnaire (scores can go from 0-40). Then they are scanned in a fMRI so we can see...

    Started by kristall‎, 09-13-2013 11:46 PM
    anova, newbie, repeated measures, spss
    • Replies: 2
    • Views: 1,243
    09-14-2013, 01:09 PM Go to last post
  40. Question about model validation.

    I'm working on a problem on my own (not for class or work) and I just wanted to get some outside opinions before I progress further. As far as my...

    Started by dberma15‎, 09-12-2013 06:14 PM
    bayesian, data analysis, model validation, statistical methods
    • Replies: 0
    • Views: 994
    09-12-2013, 06:14 PM Go to last post
  41. Using T tests in a multimediational model

    I have used Andrew Hayes PROCESS to construct a multimediational model. Does anyone know if it is possible to run T tests to compare the strengths...

    Started by rosenmarsh‎, 09-11-2013 01:32 PM
    • Replies: 0
    • Views: 779
    09-11-2013, 01:32 PM Go to last post
  42. quasi experimental design

    HI, I/\'m doing a thesis on non-compliance in procurement looking at or trying to show that noncompliance is due to psychological and economical...

    Started by Tamzylou‎, 09-07-2013 06:51 AM
    • Replies: 2
    • Views: 1,184
    09-10-2013, 11:15 AM Go to last post
  43. Exclamation Thesis Statistics - - Outcome Known, but want to categorize Participant responses

    Hi! I am beginning the process of determining which statistical tests to use for my thesis research involving high school dropouts and their...

    Started by abruno‎, 09-09-2013 05:32 PM
    • Replies: 8
    • Views: 1,366
    09-09-2013, 08:21 PM Go to last post
  44. Outcome is Ranking Variable--What is the best test?

    Hi all, I am working with a dataset in which the outcome is a rank or an ordered variable. Essentially, participants are given some information...

    Started by eveisdawning‎, 09-09-2013 02:19 PM
    rank regression, ranks
    • Replies: 1
    • Views: 986
    09-09-2013, 03:17 PM Go to last post
  45. help

    hello im not really sure if im on the right thread but anyways i really need ur help, i am conducting a study about knowledge attitude and practice...

    Started by noobieta‎, 09-06-2013 09:05 AM
    • Replies: 2
    • Views: 811
    09-07-2013, 09:02 AM Go to last post
  46. psi matrix warning--is my cure worse than the malady?

    Hi all- I've been struggling with a psi matrix warning in my multiple indicator growth model for a few weeks. I found a tentative solution this...

    Started by MattH‎, 09-07-2013 07:56 AM
    • Replies: 0
    • Views: 809
    09-07-2013, 07:56 AM Go to last post
  47. Unhappy I need help with Inter-Rater agreement

    I'm developing a scale and my items were already checked by a group of 4 judges. They gave a dichotomica response (yes, leave the item or no,...

    Started by le.peppermint‎, 09-04-2013 06:42 PM
    interrater agreement, interrater reliability
    • Replies: 4
    • Views: 1,435
    09-06-2013, 09:46 AM Go to last post
  48. Is Mann Whitney test appropriate when N=1?

    Hello everyone, Im working on my phd (psychology), finished collecting data, now dealing with their analysis. I have a question regarding the...

    Started by Gianna‎, 09-02-2013 11:58 AM
    • Replies: 5
    • Views: 1,251
    09-04-2013, 09:45 AM Go to last post
  49. 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: 2,288
    09-02-2013, 05:45 PM Go to last post
  50. Paired t-Test: 7 means which do I compare?

    Hi, I've been running research trying to ascertain if retroactive priming is possible facilitated by Extra Sensory Perception. It is based on a...

    Started by cf156‎, 08-31-2013 02:29 PM
    • Replies: 0
    • Views: 973
    08-31-2013, 02:29 PM Go to last post
  51. Comparing two tests

    I was hoping someone could give me some advice on a stats homework assignment. Most of it is pretty easy but the last question (even though it’s...

    Started by balanar‎, 08-30-2013 09:24 AM
    • Replies: 0
    • Views: 759
    08-30-2013, 09:24 AM Go to last post
  52. Do I have a Type 1 or Type 2 error here?

    Ok, so.. I am testing the effectiveness of an intervention on work outcome variables, using MANOVAs. For one of my MANOVAs I have a significant...

    Started by Lolly‎, 08-27-2013 08:14 AM
    • Replies: 8
    • Views: 1,197
    08-28-2013, 03:51 PM Go to last post
  53. Testing Group Equivalence

    Hi, I am doing an intervention study for my thesis. I need to check that the control groups and experimental groups are equal at the outset on...

    Started by Lolly‎, 08-26-2013 05:35 PM
    • Replies: 3
    • Views: 982
    08-28-2013, 03:40 PM Go to last post
  54. Help with comparing stanines across groups

    I am trying to put together some stats on a simple questionnaire (10 items) administered to approx 200 respondents from 5 different organisations....

    Started by PeterGi‎, 08-20-2013 09:01 PM
    • Replies: 1
    • Views: 788
    08-28-2013, 09:01 AM Go to last post
  55. Choosing Scales and determing if difference between questions are significant

    Hi I'm pilot testing a survey on innovation. Survey objective is to find out whether the factors affecting innovation are present in a specific work...

    Started by cookydough‎, 08-02-2013 02:29 AM
    • Replies: 2
    • Views: 873
    08-28-2013, 01:18 AM Go to last post
  56. data transformation- varied result using log10- better method?

    To transform or not to transform and how to transform data? Hi, My study: - 2 groups- 1. Not allowed to work; 2. Allowed to work (control) -...

    Started by psy_vm‎, 08-26-2013 01:21 PM
    data transformation, normal distribution, psychology statistics, spss
    • Replies: 2
    • Views: 1,480
    08-27-2013, 03:42 PM Go to last post
  57. Quick question: When running an Independent Samples MANOVA...

    Where are the univariate output tables?!! I cant see any in SPSS (I am using Syntax). I had univariate outputs for my mixed MANOVAs, but I have...

    Started by Lolly‎, 08-26-2013 05:46 PM
    • Replies: 7
    • Views: 1,205
    08-27-2013, 08:07 AM Go to last post
  58. Chi Square Expected Count less than 5!

    Hi there, any help needed with my problem would be MUCH appreciated. I have a 2x7 design. Gender VS different treatment options. I did a...

    Started by statshelpneeded‎, 08-26-2013 11:14 AM
    • Replies: 6
    • Views: 9,600
    08-27-2013, 01:28 AM Go to last post
  59. need help with sample size

    Hi all-How do I calculate sample size for a one group repeated measures? I want to know how many subjects I need for a study looking at whether a...

    Started by norajones‎, 08-27-2013 01:01 AM
    • Replies: 0
    • Views: 1,146
    08-27-2013, 01:01 AM Go to last post
  60. Help needed with analyzing sensitivity to changes in Musical sounds

    Thank you so much for your advice in advance, I owe you a pint if you are in London! :) I am trying to analyze whether kids with autism are more...

    Started by icsgreen‎, 08-26-2013 10:18 AM
    change detection, music, perception, psychology, statistics
    • Replies: 1
    • Views: 861
    08-26-2013, 11:58 AM Go to last post

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