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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: 29,880
    11-10-2005, 12:21 AM Go to last post
  1. What statistic to use? Weighting of word frequencies in psychology research study...

    Hi there, I am a psychology researcher and new to this forum. I am currently trying to figure out if there is an appropriate statistical test that I...

    Started by mcdunley‎, 01-08-2014 07:28 AM
    • Replies: 5
    • Views: 1,884
    01-09-2014, 09:13 AM Go to last post
  2. Analyzing data based on groups, but how to create this groups

    Hello, We are conducting a study about resilience in adolescents. Our data is based on self-report questionnaires. We've got 2 independent...

    Started by BurningFlame‎, 01-08-2014 04:37 AM
    creating groups
    • Replies: 1
    • Views: 1,066
    01-08-2014, 07:19 AM Go to last post
  3. SPSS syntax for MANOVA Planned Contrasts

    I want to do planned contrast analysis for each pair of age_group. I've 6 DVs(which you can see in the attachment) and the Male Variable is also...

    Started by fayyazcivil‎, 01-07-2014 11:59 AM
    • Replies: 0
    • Views: 2,236
    01-07-2014, 11:59 AM Go to last post
  4. Types of ANOVA

    Hi, I'm really sorry to ask what's probably a silly question, but I have a hypothetical scenario and I'm not sure what type of ANOVA test would be...

    Started by kate03‎, 01-07-2014 11:31 AM
    • Replies: 0
    • Views: 864
    01-07-2014, 11:31 AM Go to last post
  5. Testing if Rank Data varies significantly from 0

    Hi, I've done a survey with an 11 point Likert scale (-5 to +5, with 0).There are 30 questions total in the survey, with ~800 responses. I have...

    Started by milnehouse‎, 12-30-2013 06:02 PM
    mann-whitney u, median, non-parametric, rank
    • Replies: 1
    • Views: 1,075
    01-01-2014, 08:48 PM Go to last post
  6. Factor analysis with different groups

    Hello, I was hoping somebody might be able to help with my question about factor analysis. If I am looking to create factor scores for three...

    Started by bobolococo‎, 12-23-2013 09:17 AM
    • Replies: 0
    • Views: 1,546
    12-23-2013, 09:17 AM Go to last post
  7. Correcting for ties in Kruskal-Wallis

    Hi, I'm new to this forum so I hope I've posted this in the right place! I was just wondering if anybody could clarify something with with...

    Started by kate03‎, 12-21-2013 06:39 AM
    • Replies: 5
    • Views: 5,993
    12-22-2013, 08:45 AM Go to last post
  8. Correlating factor scores and calculating marker scale scores

    Hi, I am doing a lexical study, identifying personality factor structure of the Malay language adjectives. I have three datasets: 1) The Malay...

    Started by jay71‎, 12-18-2013 11:36 PM
    correlations, factor scores, marker scale scores, validation
    • Replies: 0
    • Views: 1,328
    12-18-2013, 11:36 PM Go to last post
  9. Analysis of Variance for Nominal Data

    Hi there, I would like to ask if there is statistical test named Maximum Likelihood Analysis of Variance (for nominal data). I have viewed it on one...

    Started by jay1ph‎, 12-01-2013 10:15 AM
    • Replies: 2
    • Views: 1,564
    12-17-2013, 02:55 PM Go to last post
  10. Lightbulb Interrater Agreement using intraclass correlation coefficient

    Hello, has some one used ICC to test the interrater agreement? Here is my problem. I've two groups of subjects. One group (n=30) has watched an...

    Started by amygdalaaaa‎, 12-03-2013 07:56 AM
    • Replies: 1
    • Views: 1,405
    12-17-2013, 02:38 PM Go to last post
  11. Smile How to analyse my research question...

    Hi all, I am wondering what would be the best way to analyse my research question. I am looking into whether childhood experience (child abuse...

    Started by bobolococo‎, 12-17-2013 10:06 AM
    • Replies: 7
    • Views: 985
    12-17-2013, 01:00 PM Go to last post
  12. Question One variable influencing the other

    Hey everyone! I'm new to statistics and would really appreciate some help. I have this one project, that I need to finish, and the objective of it...

    Started by Mpsych‎, 12-15-2013 07:31 PM
    • Replies: 2
    • Views: 1,337
    12-16-2013, 04:24 PM Go to last post
  13. Calculating confidence intervals of the average deviation from the mean

    Hello. Sorry for my horrible english. As part of my masters thesis, I have analysed a large ammount of text from COP19, and coded the text. As a...

    Started by LukaDalum‎, 12-16-2013 05:32 AM
    • Replies: 0
    • Views: 1,046
    12-16-2013, 05:32 AM Go to last post
  14. To report or not to report posthocs for a 'back up' test

    Short version - I have run some non-parametric tests (Friedman) as sort of backup to a ANOVA because of an assumption violation - should I report the...

    Started by Esme‎, 12-10-2013 04:40 PM
    follow-up, non-parametric tests, paired comparisons, reporting results
    • Replies: 4
    • Views: 1,577
    12-15-2013, 12:19 AM Go to last post
  15. what test to use?

    Dr. Bradshaw, a dean at a university wonders whether performance by students in her school has fallen this semester. Students in the school of...

    Started by steve5368‎, 12-12-2013 03:24 AM
    • Replies: 1
    • Views: 1,122
    12-12-2013, 04:02 AM Go to last post
  16. tricky question.. within session measures.

    I have one person stationary cycling for 20 minutes, with a target rotation time. Now, i have taken two samples from this data, one consisting of...

    Started by medelza‎, 12-11-2013 05:20 AM
    • Replies: 0
    • Views: 807
    12-11-2013, 05:20 AM Go to last post
  17. Best analysis for intervention study & how to analyse mediating variables

    I need help to determine the best statistical analysis to run for a pre-test post-test intervention study. This is a 2 part question. I have...

    Started by Tanned Man‎, 12-09-2013 01:28 AM
    • Replies: 0
    • Views: 1,865
    12-09-2013, 01:28 AM Go to last post
  18. 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: 1,494
    12-07-2013, 11:06 AM Go to last post
  19. 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: 1,322
    12-05-2013, 10:53 AM Go to last post
  20. 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: 1,511
    12-04-2013, 10:50 PM Go to last post
  21. 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: 1,076
    12-04-2013, 08:14 AM Go to last post
  22. 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: 1,013
    12-04-2013, 03:06 AM Go to last post
  23. 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: 850
    12-03-2013, 12:38 PM Go to last post
  24. 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: 749
    11-28-2013, 07:10 AM Go to last post
  25. 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: 854
    11-28-2013, 05:04 AM Go to last post
  26. 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: 1,132
    11-27-2013, 07:30 AM Go to last post
  27. 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: 974
    11-26-2013, 08:15 AM Go to last post
  28. 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: 1,094
    11-25-2013, 02:29 PM Go to last post
  29. 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: 1,107
    11-24-2013, 05:32 PM Go to last post
  30. (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: 1,154
    11-22-2013, 10:59 AM Go to last post
  31. 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: 2,340
    11-22-2013, 03:31 AM Go to last post
  32. [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: 1,649
    11-21-2013, 04:22 PM Go to last post
  33. 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: 986
    11-21-2013, 07:08 AM Go to last post
  34. 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: 1,321
    11-20-2013, 04:40 PM Go to last post
  35. 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: 1,404
    11-20-2013, 10:50 AM Go to last post
  36. 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: 1,121
    11-20-2013, 08:22 AM Go to last post
  37. 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: 1,033
    11-20-2013, 04:01 AM Go to last post
  38. 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: 929
    11-19-2013, 03:48 PM Go to last post
  39. 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: 1,801
    11-19-2013, 03:28 PM Go to last post
  40. 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: 1,027
    11-19-2013, 08:55 AM Go to last post
  41. 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: 837
    11-18-2013, 01:23 PM Go to last post
  42. 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: 1,329
    11-18-2013, 10:38 AM Go to last post
  43. 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: 3,838
    11-18-2013, 08:43 AM Go to last post
  44. 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: 1,862
    11-16-2013, 04:10 PM Go to last post
  45. 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: 978
    11-15-2013, 08:08 AM Go to last post
  46. 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: 714
    11-14-2013, 08:50 PM Go to last post
  47. 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: 1,289
    11-14-2013, 04:38 PM Go to last post
  48. 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: 869
    11-13-2013, 11:09 AM Go to last post
  49. 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: 1,002
    11-12-2013, 05:22 PM Go to last post
  50. 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: 1,194
    11-12-2013, 09:51 AM Go to last post
  51. 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: 1,056
    11-11-2013, 08:40 PM Go to last post
  52. 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: 1,156
    11-11-2013, 04:22 PM Go to last post
  53. 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: 1,449
    11-10-2013, 05:40 PM Go to last post
  54. 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: 960
    11-10-2013, 04:10 PM Go to last post
  55. 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: 1,394
    11-09-2013, 06:09 AM Go to last post
  56. 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: 4,939
    11-08-2013, 09:51 PM Go to last post
  57. 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: 2,257
    11-08-2013, 09:29 PM Go to last post
  58. 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: 1,426
    11-08-2013, 09:11 PM Go to last post
  59. 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: 3,695
    11-08-2013, 10:37 AM Go to last post
  60. 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: 816
    11-08-2013, 09:56 AM Go to last post

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