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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: 27,689
    11-10-2005, 12:21 AM Go to last post
  1. Do I Use ANCOVA or Direct Difference

    Hi, I have pre- and post- test data from both a test and control group and want to see whether the test group improved more than the control group....

    Started by dolphin2209‎, 12-06-2013 07:31 PM
    • Replies: 7
    • Views: 1,294
    12-07-2013, 11:06 AM Go to last post
  2. Single group + musical training + score

    Hello my friends! Hope its all good with you. So, here I am, maybe like any other psycholody student who struggle with statistic anylisis in his...

    Started by telmoserrano‎, 12-03-2013 09:09 AM
    • Replies: 4
    • Views: 1,043
    12-05-2013, 10:53 AM Go to last post
  3. Factorial ANOVA

    I am working on a 2x2 ANOVA about the effect of gender and major on grad school interest. I have found that there is a significant statistical...

    Started by Wedsau‎, 12-04-2013 10:50 PM
    • Replies: 0
    • Views: 1,245
    12-04-2013, 10:50 PM Go to last post
  4. Do I need to transform my data?

    I conducted an experiment in which 25 participants had to determine whether a dot has changed its original position after being interfered with some...

    Started by Jeroen‎, 12-02-2013 09:15 AM
    • Replies: 1
    • Views: 907
    12-04-2013, 08:14 AM Go to last post
  5. Moderated Multiple regression help? Basic understanding

    I am doing an honors thesis that involves a moderator. I need a basic understanding of moderated multiple regression for my methods section. I have...

    Started by dirkwww‎, 12-03-2013 12:10 PM
    • Replies: 1
    • Views: 844
    12-04-2013, 03:06 AM Go to last post
  6. Am I doing the right thing???

    Hi, Could someone confirm if I have used the right tests please.... Im testing if staff training impacts on attitude to patients using a...

    Started by Gpsych‎, 12-03-2013 12:38 PM
    • Replies: 0
    • Views: 765
    12-03-2013, 12:38 PM Go to last post
  7. Normality tests and Shape statistics contradictory

    Hello. I am testing for normality on a number of repeated measures variables in a sample of 29 people. Both the Kolmogorov-Smirnov test and the...

    Started by capn_kangaroo‎, 11-28-2013 07:10 AM
    kolmogorov-smirnov, kurtosis, normality, shapiro-wilk, skew
    • Replies: 0
    • Views: 692
    11-28-2013, 07:10 AM Go to last post
  8. Choosing an appropriate test?

    Hi guys, So I'm preparing a research proposal in the attempt to answer this research question: To investigate whether direct contact between an...

    Started by Jezza92‎, 11-28-2013 05:04 AM
    • Replies: 0
    • Views: 731
    11-28-2013, 05:04 AM Go to last post
  9. Question Experimental design - what to call ours?

    Hi, I have a question regarding the design of our experiment and what to call it. Me and three other students are performing an experiment for our...

    Started by AJFK‎, 11-27-2013 07:30 AM
    • Replies: 0
    • Views: 941
    11-27-2013, 07:30 AM Go to last post
  10. Exclamation within subjects analysis assistance

    I came in to a lesson as a trainee teacher and was informed the students were doing a research project and needed assistance with the analysis. The...

    Started by phoenix877‎, 11-26-2013 06:23 AM
    • Replies: 1
    • Views: 813
    11-26-2013, 08:15 AM Go to last post
  11. hello noobish question (which test to use)

    Hello This is for an assignment for uni in coaching psychology. I'm trying to see whether there is a correlation between perceieved stress and...

    Started by Pasag‎, 11-25-2013 02:29 PM
    • Replies: 0
    • Views: 856
    11-25-2013, 02:29 PM Go to last post
  12. Difficult design, how to analyze ?

    Hello all, I have a hard design which I don't know how to analyze. I have 20 subjects. Each was asked a question in 3 different ways. The...

    Started by Yankel‎, 11-24-2013 04:23 PM
    • Replies: 1
    • Views: 929
    11-24-2013, 05:32 PM Go to last post
  13. (Uni)dimensionality issue - consultation

    Hi, I would need to support the unidimensionality assumption for IRT. I have about 25 dichotomous items in test. To do that... I did... 1) PCA...

    Started by Martin Marko‎, 11-10-2013 11:01 AM
    • Replies: 2
    • Views: 980
    11-22-2013, 10:59 AM Go to last post
  14. Nonequivalent-group pretest posttest design. Is this valid?

    Dear Statisticians, I find myself in a rather difficult setup for a field experiment. I need to measure if a regional Facebook advert as...

    Started by Ruud‎, 11-22-2013 03:31 AM
    • Replies: 0
    • Views: 2,039
    11-22-2013, 03:31 AM Go to last post
  15. [help, urgent] multiple imputation split on group variable

    hi! In my design, I have predicor variables which are assessed for all participants. The experimental manipulation occurs before the assessment of...

    Started by therp‎, 11-21-2013 04:22 PM
    • Replies: 0
    • Views: 1,318
    11-21-2013, 04:22 PM Go to last post
  16. Independent samples T test

    Hi, I'm working my way through homework, but I'm having trouble reporting the results of this one study. Peg word mnemonic Method of Loci...

    Started by Mia2013‎, 11-21-2013 07:08 AM
    • Replies: 0
    • Views: 808
    11-21-2013, 07:08 AM Go to last post
  17. Correlation between paired samples and an independent variable?

    Hi everybody! This is from a study in medicine trying to find whether good consultation can improve patients well-being. In the study patients...

    Started by erik.jar‎, 11-19-2013 10:20 AM
    • Replies: 3
    • Views: 1,088
    11-20-2013, 04:40 PM Go to last post
  18. Interpreting very high and very low KMO/adequacy values. Dimensionality?

    Hello there first of all! Glad to be on an active stats forum. Background: short-term cohort study with several test dates. One of the focuses was...

    Started by statcat‎, 11-20-2013 10:50 AM
    • Replies: 0
    • Views: 1,177
    11-20-2013, 10:50 AM Go to last post
  19. Best test?

    Hi, I wonder if anyone can help me. I'm trying to work out the best statistical test to use with my data. I'm trying to investigate prevalence of...

    Started by cls1‎, 11-19-2013 10:13 AM
    • Replies: 5
    • Views: 1,000
    11-20-2013, 08:22 AM Go to last post
  20. sample effect size vs true effect size

    Is it true that sample effect size is probably lower than the true effect size? If yes, Why?

    Started by fayyazcivil‎, 11-20-2013 02:11 AM
    • Replies: 2
    • Views: 841
    11-20-2013, 04:01 AM Go to last post
  21. Appropriate Statistical Analysis

    Hello All What is the appropriate test I've to run for the following data to know about any significant finding for the social facilitation process?

    Started by fayyazcivil‎, 11-19-2013 04:03 AM
    • Replies: 2
    • Views: 773
    11-19-2013, 03:48 PM Go to last post
  22. Analytical Model(IVs, DVs, and CVs)

    I want to test whether short exposure to emotional content alters individuals’ feelings of affiliation—i.e., the extent to which individuals feel...

    Started by fayyazcivil‎, 11-19-2013 03:22 PM
    • Replies: 1
    • Views: 1,485
    11-19-2013, 03:28 PM Go to last post
  23. Lower effect size and power analysis

    I've a question regarding this problem A person is running a power analysis to determine the sample size for an upcoming study. He takes α = .05...

    Started by fayyazcivil‎, 11-19-2013 02:09 AM
    • Replies: 1
    • Views: 855
    11-19-2013, 08:55 AM Go to last post
  24. Between-participants experiments

    Hi, this is one of my assignment question. I would really appreciate it if someone could point me in the right direction, I'm new to statistics and...

    Started by fayyazcivil‎, 11-18-2013 01:07 PM
    • Replies: 1
    • Views: 743
    11-18-2013, 01:23 PM Go to last post
  25. 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: 1,052
    11-18-2013, 10:38 AM Go to last post
  26. 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: 3,368
    11-18-2013, 08:43 AM Go to last post
  27. 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: 1,564
    11-16-2013, 04:10 PM Go to last post
  28. 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: 834
    11-15-2013, 08:08 AM Go to last post
  29. 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: 606
    11-14-2013, 08:50 PM Go to last post
  30. 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: 1,028
    11-14-2013, 04:38 PM Go to last post
  31. 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: 728
    11-13-2013, 11:09 AM Go to last post
  32. 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: 919
    11-12-2013, 05:22 PM Go to last post
  33. 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: 1,003
    11-12-2013, 09:51 AM Go to last post
  34. 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: 870
    11-11-2013, 08:40 PM Go to last post
  35. 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: 1,030
    11-11-2013, 04:22 PM Go to last post
  36. 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 09:04 AM
    • Replies: 3
    • Views: 1,278
    11-10-2013, 05:40 PM Go to last post
  37. 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: 800
    11-10-2013, 04:10 PM Go to last post
  38. 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: 1,184
    11-09-2013, 06:09 AM Go to last post
  39. 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 03:32 PM
    multi-variable, psychology statistics
    • Replies: 6
    • Views: 4,167
    11-08-2013, 09:51 PM Go to last post
  40. 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 12:52 AM
    • Replies: 4
    • Views: 1,925
    11-08-2013, 09:29 PM Go to last post
  41. 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: 1,255
    11-08-2013, 09:11 PM Go to last post
  42. 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: 3,251
    11-08-2013, 10:37 AM Go to last post
  43. 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: 670
    11-08-2013, 09:56 AM Go to last post
  44. 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: 2,064
    11-06-2013, 02:50 PM Go to last post
  45. 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: 7,541
    11-06-2013, 09:44 AM Go to last post
  46. 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: 2,609
    11-04-2013, 06:36 AM Go to last post
  47. 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: 1,623
    11-02-2013, 08:17 AM Go to last post
  48. 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: 937
    11-02-2013, 03:44 AM Go to last post
  49. 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: 986
    11-01-2013, 03:06 PM Go to last post
  50. 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: 1,313
    11-01-2013, 12:28 PM Go to last post
  51. 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: 1,575
    11-01-2013, 10:06 AM Go to last post
  52. 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: 1,868
    10-31-2013, 08:24 PM Go to last post
  53. 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: 1,192
    10-31-2013, 03:20 PM Go to last post
  54. 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: 829
    10-29-2013, 06:25 PM Go to last post
  55. 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: 760
    10-28-2013, 04:19 PM Go to last post
  56. 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: 1,521
    10-28-2013, 12:51 PM Go to last post
  57. 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: 1,998
    10-27-2013, 09:28 AM Go to last post
  58. 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: 3,504
    10-24-2013, 02:23 PM Go to last post
  59. 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: 2,732
    10-23-2013, 05:37 PM Go to last post
  60. 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: 3,341
    10-22-2013, 01:30 PM Go to last post

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