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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: 30,061
    11-10-2005, 12:21 AM Go to last post
  1. What type of test to use? (Averages of averages?)

    Hello everybody, I'm trying to decide what would be the best test to use. I have a survey made up of 40 items. Each item was a word for a...

    Started by this-is-me‎, 11-08-2013 09:56 AM
    averages of averages, correlation, factor anaylsis
    • Replies: 0
    • Views: 835
    11-08-2013, 09:56 AM Go to last post
  2. which test to use ?and how to report non-significant manova results?

    Hi there, I have some questions about my data analyses and I hope you help me with that. In one of my hypotheses I am assuming that there will...

    Started by malik‎, 11-06-2013 02:50 PM
    • Replies: 0
    • Views: 2,507
    11-06-2013, 02:50 PM Go to last post
  3. Friedman test significant but post-hoc tests not?

    Hello, I am currently analysing some data based on scores from a mood scale of 8 participants before and after a move (there are three time points,...

    Started by Daisydaisy1‎, 11-05-2013 05:03 AM
    • Replies: 10
    • Views: 8,268
    11-06-2013, 09:44 AM Go to last post
  4. Inter-Rating Reliability / Intra-Class Correlation in SPSS - Help Requested

    Hi, To start with I have almost zero stats experience so please bear with me :) I have recently conducted a survey with 14 raters assessing the...

    Started by GarethLock‎, 10-24-2013 03:15 PM
    • Replies: 2
    • Views: 2,926
    11-04-2013, 06:36 AM Go to last post
  5. Coursework help - outcomes of 3 treatments via baseline & post treatment measures.

    Hi! I've never been good with statistics but have been trying hard recently and getting the hang of things (I think!). Now faced with coursework I am...

    Started by tamsynann‎, 10-29-2013 12:30 PM
    • Replies: 3
    • Views: 1,915
    11-02-2013, 08:17 AM Go to last post
  6. Between group test, 2 independent variables which test to go for?

    Hi everyone, I am unsure of the statical test I need to run. The independent variable has two dimensions that should not interact with each...

    Started by Jul!a‎, 10-09-2013 10:52 AM
    2 independent variables, between group test
    • Replies: 2
    • Views: 1,278
    11-02-2013, 03:44 AM Go to last post
  7. Talking Which test to use?

    Right guys, I've been out of this for a while and I need some help deciding which test I should be using. I am trying to measure three things;...

    Started by rustyatstatistics‎, 11-01-2013 11:06 AM
    • Replies: 2
    • Views: 1,194
    11-01-2013, 03:06 PM Go to last post
  8. Exclamation What kind of ANOVA is this?

    Ok...I know this may be a silly question but I am extremely bad at stats. I have an experiment with two IVs and a control group. ie. one group...

    Started by eb11‎, 10-31-2013 03:37 PM
    anova, factor, independent variables
    • Replies: 5
    • Views: 1,620
    11-01-2013, 12:28 PM Go to last post
  9. binomial logistic regression

    Hi all, I would like to know the assumptions of binomial logistic regression in generalized linear model. I can't find a book talking about that...

    Started by WWH‎, 10-23-2013 08:00 AM
    • Replies: 7
    • Views: 1,876
    11-01-2013, 10:06 AM Go to last post
  10. Optimal data analysis

    Hello Group and thank you for taking the time to read this.. My research is examining whether membership of one of two personality categories...

    Started by doctorfoster‎, 02-01-2009 08:22 AM
    • Replies: 2
    • Views: 2,135
    10-31-2013, 08:24 PM Go to last post
  11. Mistake in design? No control group...!

    Hi all, I am concerned that I have made an error in my design and need to present stats soon and fear looking like a fool :( Essentially what...

    Started by campsych‎, 10-26-2013 07:09 PM
    design, psychology
    • Replies: 7
    • Views: 1,440
    10-31-2013, 03:20 PM Go to last post
  12. Question about what test to run when comparing groups.

    I am doing a research study on the effects of study methods on exam performance. I have already administered a survey and collected data from...

    Started by astowers‎, 10-29-2013 06:17 PM
    anova, data analysis, psychology, regression, statistics
    • Replies: 3
    • Views: 1,047
    10-29-2013, 06:25 PM Go to last post
  13. Statistical analysis for single-case designs question

    Hello, I'm attempting to conduct an analysis of single-subject data and am unclear on a particular step. I have collected repeated measures of a...

    Started by xmorphicx‎, 10-28-2013 04:19 PM
    • Replies: 0
    • Views: 917
    10-28-2013, 04:19 PM Go to last post
  14. memory study - parametric or non parametric test

    Hello there, I've conducted a memory study which aim is to evaluate the effect of the spatial position of a visual object (left upper, left lower,...

    Started by elior‎, 10-27-2013 04:05 PM
    anova, chi square, memory, non parametric
    • Replies: 4
    • Views: 1,784
    10-28-2013, 12:51 PM Go to last post
  15. What is the independent variable?

    Hi… I am doing a study that involves looking at what attitudes Math students have towards people with mental illness, using one particular survey....

    Started by WillHan‎, 10-25-2013 05:13 AM
    • Replies: 4
    • Views: 2,504
    10-27-2013, 09:28 AM Go to last post
  16. AMOS - comparing 2 models but are they nested?!

    I really hope you can help. I'm just starting off with CFA and am struggling. I have a measure that has 20 items. There are competing models in...

    Started by Binka‎, 10-23-2013 03:00 PM
    • Replies: 3
    • Views: 4,030
    10-24-2013, 02:23 PM Go to last post
  17. Cool sample weighting/rim weighting/raking

    Hello, I have the following problem. I have a sample of people say 5 people as shown below, with information on some behavior of theirs, lets...

    Started by svs‎, 10-06-2013 09:15 PM
    raking, rim weighting, sample weighting, weighting
    • Replies: 2
    • Views: 3,395
    10-23-2013, 05:37 PM Go to last post
  18. Calculating sample size for a two way MANOVA using gpower?

    Hi! Just wondering if anyone can help me with this? My normal go to textbook - Quantitative Psychology by Clark-Carter - doesn't cover...

    Started by BeckyTremayne‎, 10-22-2013 01:30 PM
    gpower, manova, priori analysis, sample size
    • Replies: 0
    • Views: 4,513
    10-22-2013, 01:30 PM Go to last post
  19. Red face Percentage Prevalence comparison (non-independent groups)

    Hi all! I have a dataset which I think could potentially be very exciting but I am struggling to find how to analyse it! We have gathered...

    Started by rebecca_lyndsey‎, 10-22-2013 03:28 AM
    chi-square, percentage, percentage comparison, prevalence
    • Replies: 0
    • Views: 1,489
    10-22-2013, 03:28 AM Go to last post
  20. 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: 1,076
    10-21-2013, 10:13 PM Go to last post
  21. 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: 2,479
    10-21-2013, 02:59 PM Go to last post
  22. 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: 877
    10-21-2013, 12:38 PM Go to last post
  23. 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: 810
    10-21-2013, 10:55 AM Go to last post
  24. 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: 1,209
    10-20-2013, 03:42 PM Go to last post
  25. 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: 894
    10-20-2013, 02:18 PM Go to last post
  26. 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: 12,756
    10-20-2013, 03:40 AM Go to last post
  27. 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: 1,555
    10-18-2013, 11:02 PM Go to last post
  28. 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: 2,464
    10-17-2013, 04:26 PM Go to last post
  29. 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: 1,179
    10-17-2013, 01:49 AM Go to last post
  30. 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: 1,145
    10-16-2013, 11:39 AM Go to last post
  31. 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: 1,112
    10-16-2013, 08:09 AM Go to last post
  32. 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: 1,023
    10-15-2013, 08:53 PM Go to last post
  33. 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: 955
    10-15-2013, 08:47 PM Go to last post
  34. 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: 2,234
    10-15-2013, 02:39 AM Go to last post
  35. 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: 8,810
    10-13-2013, 04:34 PM Go to last post
  36. 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: 2,376
    10-13-2013, 10:44 AM Go to last post
  37. 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: 1,566
    10-11-2013, 05:41 PM Go to last post
  38. 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: 1,106
    10-11-2013, 04:31 PM Go to last post
  39. 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: 869
    10-11-2013, 04:21 PM Go to last post
  40. 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: 1,641
    10-11-2013, 11:25 AM Go to last post
  41. 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: 943
    10-10-2013, 10:05 AM Go to last post
  42. 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: 3,838
    10-10-2013, 08:16 AM Go to last post
  43. 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: 2,254
    10-09-2013, 08:51 AM Go to last post
  44. 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: 1,198
    10-08-2013, 11:25 PM Go to last post
  45. 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: 1,041
    10-08-2013, 08:34 PM Go to last post
  46. 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: 2,016
    10-04-2013, 07:14 PM Go to last post
  47. 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: 1,205
    10-04-2013, 04:51 PM Go to last post
  48. 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: 939
    10-04-2013, 04:22 PM Go to last post
  49. 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: 996
    10-01-2013, 04:18 PM Go to last post
  50. 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: 1,669
    09-27-2013, 10:18 AM Go to last post
  51. 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: 980
    09-27-2013, 05:31 AM Go to last post
  52. 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: 3,176
    09-25-2013, 01:13 PM Go to last post
  53. 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: 2,182
    09-24-2013, 02:43 AM Go to last post
  54. 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: 1,493
    09-24-2013, 01:09 AM Go to last post
  55. [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: 1,164
    09-23-2013, 06:12 AM Go to last post
  56. 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: 18,260
    09-20-2013, 12:46 AM Go to last post
  57. 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: 1,391
    09-16-2013, 12:13 PM Go to last post
  58. 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: 1,418
    09-14-2013, 01:09 PM Go to last post
  59. 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: 1,207
    09-12-2013, 06:14 PM Go to last post
  60. 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: 1,000
    09-11-2013, 01:32 PM Go to last post

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