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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: 21,823
    11-10-2005, 12:21 AM Go to last post
  1. Propensity score matching

    Does anyone of any guidelines for choosing a caliper for propensity score matching? I am doing a graduate course project where we have to use radius...

    Started by MsCorLo‎, 11-18-2013 10:38 AM
    propensity score matching, radius matchin
    • Replies: 0
    • Views: 544
    11-18-2013, 10:38 AM Go to last post
  2. 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: 2,304
    11-18-2013, 08:43 AM Go to last post
  3. appropriate statistical analysis with experience sampling design

    In an experience sampling exploratory study we asked participants to report on a set of continuous variables (IVs= x1, x2, x3, x4, x5 , DV=y) 5...

    Started by pippo‎, 11-16-2013 04:10 PM
    • Replies: 0
    • Views: 889
    11-16-2013, 04:10 PM Go to last post
  4. Complex Randomisation in Clinical Trials

    I am running a clinical trail. At the end I will have 45 people in a control group and 70 with T1 & T2 treatment data. I want to use a post hoc...

    Started by PavolovsDog‎, 11-15-2013 08:08 AM
    • Replies: 0
    • Views: 573
    11-15-2013, 08:08 AM Go to last post
  5. Unhappy Please help! interactions and significant main effects?

    I have posted the question (just one) and all my matrix and graphs in attachments. I know there is an interaction and a significant main effect for...

    Started by cupcakegirl932‎, 11-14-2013 08:50 PM
    • Replies: 0
    • Views: 462
    11-14-2013, 08:50 PM Go to last post
  6. Lower Power

    Why is designing a study with low power problematic? Please answer briefly.

    Started by fayyazcivil‎, 11-14-2013 02:27 PM
    • Replies: 3
    • Views: 531
    11-14-2013, 04:38 PM Go to last post
  7. simple effects analysis

    Hello, My apologies if this topic should not be here. I have a within participant design with two variables: view and task. I obtain an interaction...

    Started by ajestudillo‎, 11-13-2013 11:09 AM
    2x2 anova, simple effects analysis, spss 20, within subject
    • Replies: 0
    • Views: 497
    11-13-2013, 11:09 AM Go to last post
  8. Which test is appropriate?

    I'm trying to test whether time (IV1) has an effect on the relationship between a specific personality feature (IV2, quasi-continuous) and scores on...

    Started by laffitaffy‎, 11-12-2013 05:22 PM
    help needed, personality, social cognition, time, which test
    • Replies: 0
    • Views: 743
    11-12-2013, 05:22 PM Go to last post
  9. Question about analyzing survey data for two populations

    I am administering two surveys, one to faculty and one to students. The surveys are similar, but the items for the students ask about their actual...

    Started by Whetstone‎, 11-11-2013 11:18 AM
    • Replies: 2
    • Views: 638
    11-12-2013, 09:51 AM Go to last post
  10. who can give me some suggestions for this problem?

    With the population data from X state on Reading and Math for 2003 and 2004, we can find out facts about the kids from those two years with 100%...

    Started by mhwxl‎, 11-10-2013 10:48 PM
    • Replies: 1
    • Views: 552
    11-11-2013, 08:40 PM Go to last post
  11. Which test to use - help please!

    Hi, could someone advise me on which test i should be using please? Im testing if staff training impacts on attitude to patients using a between...

    Started by Gpsych‎, 11-10-2013 06:01 PM
    • Replies: 4
    • Views: 790
    11-11-2013, 04:22 PM Go to last post
  12. Confusion: "effect size suggests experimentals did half a SD better than controls"

    Hello, I am reading an article an I am having trouble understanding an aspect of effect size. The article...

    Started by hermes014‎, 10-27-2013 10:04 AM
    • Replies: 3
    • Views: 935
    11-10-2013, 05:40 PM Go to last post
  13. Using factor analysis to avoid Bonferroni death?

    Hi! I have a study with three dichotomous IVs and five DVs, which are brief, relatively reliable composite scales derived through factor analysis....

    Started by Erin2‎, 11-10-2013 04:10 PM
    bonferroni correction, factor analysis, type 1 error
    • Replies: 0
    • Views: 540
    11-10-2013, 04:10 PM Go to last post
  14. Repeated measures ANCOVA - assumptions & covariates?

    Hi, So I am currently looking to carry out an ANCOVA, I have three treatment groups who each had carbon monoxide measure before and after treatment....

    Started by tamsynann‎, 11-09-2013 06:09 AM
    • Replies: 0
    • Views: 765
    11-09-2013, 06:09 AM Go to last post
  15. One IV (2levels) 4 DVS - What test to use?

    Hi all, Asked a question on this forum previously and the response is far greater than any other forum around! I have been collecting pre and...

    Started by campsych‎, 10-31-2013 04:32 PM
    multi-variable, psychology statistics
    • Replies: 6
    • Views: 1,990
    11-08-2013, 09:51 PM Go to last post
  16. Multiple regression for survey study - question re analysis and required sample

    Hi, The question I'm looking for help with is firstly to confirm with wiser people that the planned analysis is actually best suited to the data...

    Started by CraigBH‎, 10-18-2013 01:52 AM
    • Replies: 4
    • Views: 1,218
    11-08-2013, 09:29 PM Go to last post
  17. How to best analyze individual level predictor vs. organization level outcome data

    I have inherited a dataset with two types of data from an employee opinion survey project spanning multiple organizations. We have responses by...

    Started by StevenF‎, 11-04-2013 08:29 AM
    • Replies: 2
    • Views: 967
    11-08-2013, 09:11 PM Go to last post
  18. 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: 2,639
    11-08-2013, 10:37 AM Go to last post
  19. 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: 430
    11-08-2013, 09:56 AM Go to last post
  20. 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: 1,174
    11-06-2013, 02:50 PM Go to last post
  21. 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: 5,197
    11-06-2013, 09:44 AM Go to last post
  22. 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 04:15 PM
    • Replies: 2
    • Views: 1,483
    11-04-2013, 06:36 AM Go to last post
  23. 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 01:30 PM
    • Replies: 3
    • Views: 1,180
    11-02-2013, 09:17 AM Go to last post
  24. 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 11:52 AM
    2 independent variables, between group test
    • Replies: 2
    • Views: 630
    11-02-2013, 04:44 AM Go to last post
  25. 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 12:06 PM
    • Replies: 2
    • Views: 671
    11-01-2013, 04:06 PM Go to last post
  26. 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 04:37 PM
    anova, factor, independent variables
    • Replies: 5
    • Views: 893
    11-01-2013, 01:28 PM Go to last post
  27. 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 09:00 AM
    • Replies: 7
    • Views: 1,184
    11-01-2013, 11:06 AM Go to last post
  28. 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: 1,418
    10-31-2013, 09:24 PM Go to last post
  29. 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 08:09 PM
    design, psychology
    • Replies: 7
    • Views: 924
    10-31-2013, 04:20 PM Go to last post
  30. 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 07:17 PM
    anova, data analysis, psychology, regression, statistics
    • Replies: 3
    • Views: 656
    10-29-2013, 07:25 PM Go to last post
  31. 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 05:19 PM
    • Replies: 0
    • Views: 533
    10-28-2013, 05:19 PM Go to last post
  32. 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 05:05 PM
    anova, chi square, memory, non parametric
    • Replies: 4
    • Views: 1,008
    10-28-2013, 01:51 PM Go to last post
  33. 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 06:13 AM
    • Replies: 4
    • Views: 873
    10-27-2013, 10:28 AM Go to last post
  34. 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 04:00 PM
    • Replies: 3
    • Views: 2,156
    10-24-2013, 03:23 PM Go to last post
  35. 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 10:15 PM
    raking, rim weighting, sample weighting, weighting
    • Replies: 2
    • Views: 1,311
    10-23-2013, 06:37 PM Go to last post
  36. 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 02:30 PM
    gpower, manova, priori analysis, sample size
    • Replies: 0
    • Views: 2,196
    10-22-2013, 02:30 PM Go to last post
  37. 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 04:28 AM
    chi-square, percentage, percentage comparison, prevalence
    • Replies: 0
    • Views: 727
    10-22-2013, 04:28 AM Go to last post
  38. 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 11:13 PM
    • Replies: 0
    • Views: 455
    10-21-2013, 11:13 PM Go to last post
  39. 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 03:50 PM
    dissertation, mixed model anova, multilevel modeling, pilot, sample size
    • Replies: 1
    • Views: 1,203
    10-21-2013, 03:59 PM Go to last post
  40. 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 01:38 PM
    ancova
    • Replies: 0
    • Views: 402
    10-21-2013, 01:38 PM Go to last post
  41. 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 11:55 AM
    repeated measures manova, research design
    • Replies: 0
    • Views: 430
    10-21-2013, 11:55 AM Go to last post
  42. 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 03:12 PM
    • Replies: 3
    • Views: 625
    10-20-2013, 04:42 PM Go to last post
  43. 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 12:43 PM
    • Replies: 3
    • Views: 569
    10-20-2013, 03:18 PM Go to last post
  44. 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 10:08 AM
    • Replies: 1
    • Views: 10,182
    10-20-2013, 04:40 AM Go to last post
  45. 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, 10-19-2013 12:02 AM
    • Replies: 0
    • Views: 573
    10-19-2013, 12:02 AM Go to last post
  46. 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 12:37 PM
    • Replies: 13
    • Views: 1,113
    10-17-2013, 05:26 PM Go to last post
  47. 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 01:05 PM
    • Replies: 1
    • Views: 628
    10-17-2013, 02:49 AM Go to last post
  48. 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 12:39 PM
    • Replies: 0
    • Views: 444
    10-16-2013, 12:39 PM Go to last post
  49. 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, 10-16-2013 12:54 AM
    • Replies: 1
    • Views: 627
    10-16-2013, 09:09 AM Go to last post
  50. 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 09:42 PM
    • Replies: 2
    • Views: 534
    10-15-2013, 09:53 PM Go to last post
  51. 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 09:47 PM
    • Replies: 0
    • Views: 522
    10-15-2013, 09:47 PM Go to last post
  52. 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 03:17 AM
    higher-order, scale, validation
    • Replies: 2
    • Views: 726
    10-15-2013, 03:39 AM Go to last post
  53. 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 05:36 PM
    alpha, scale development
    • Replies: 14
    • Views: 4,705
    10-13-2013, 05:34 PM Go to last post
  54. 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 08:37 PM
    • Replies: 1
    • Views: 849
    10-13-2013, 11:44 AM Go to last post
  55. 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 09:06 AM
    • Replies: 3
    • Views: 921
    10-11-2013, 06:41 PM Go to last post
  56. 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 02:47 AM
    • Replies: 1
    • Views: 612
    10-11-2013, 05:31 PM Go to last post
  57. 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 03:06 AM
    • Replies: 1
    • Views: 637
    10-11-2013, 05:21 PM Go to last post
  58. 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 10:41 AM
    moderation, regression analysis
    • Replies: 1
    • Views: 928
    10-11-2013, 12:25 PM Go to last post
  59. 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 11:05 AM
    • Replies: 0
    • Views: 423
    10-10-2013, 11:05 AM Go to last post
  60. 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 09:16 AM
    amos, residuals, standard error, structural equation model
    • Replies: 0
    • Views: 1,182
    10-10-2013, 09:16 AM Go to last post

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