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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: 31,424
    11-10-2005, 12:21 AM Go to last post
  1. Comparing differences between groups over time with nominal variables

    Hi all, I'd like to compare differences between groups over time, but I only have a nominal variable to work with ('yes', 'no', 'unsure'). It's a 2 x...

    Started by Ella_10‎, 01-17-2014 01:45 AM
    • Replies: 0
    • Views: 1,614
    01-17-2014, 01:45 AM Go to last post
  2. How to perform contrast analyses on ANOVA interaction?

    Hi all! :) For my research I have a 2 x 3 design, both variables are nominal. Therefore I performed a two-way ANOVA, or Univariate in SPSS. For...

    Started by jant90‎, 01-15-2014 12:23 PM
    • Replies: 2
    • Views: 2,068
    01-15-2014, 06:06 PM Go to last post
  3. Do I need to worry about normality, if the DV is a 1-item 10point likert scale ?

    Dear all, I hope you can help me with the following question My design was a 2 x 2 with a single item measuring responsibility on a 10 point...

    Started by plush‎, 01-14-2014 11:29 AM
    normality, parametric, ranked
    • Replies: 3
    • Views: 1,992
    01-14-2014, 01:17 PM Go to last post
  4. What Is F in Univariate Anova Report?

    Hi, can someone tell me where/what is F(_,_) when reporting a univariate anova result? where do i get this from?

    Started by Gpsych‎, 11-21-2013 11:23 AM
    • Replies: 7
    • Views: 2,746
    01-14-2014, 10:53 AM Go to last post
  5. Statistical significance of age difference between male and female subjects

    "The ages of the male group were 20.5±1.2 and the ages of the females 19.2±2.3. The difference in mean age between the groups is not...

    Started by wildetudor‎, 01-12-2014 09:30 AM
    • Replies: 4
    • Views: 2,685
    01-13-2014, 04:35 PM Go to last post
  6. what (depedent) variable to use when checking normality test

    Hi there, I'm testing whether there is a difference in binge drinkers or Non-binge drinkers verbal declarative memory and processing speed. I...

    Started by Bullseye‎, 01-11-2014 11:07 AM
    • Replies: 3
    • Views: 2,134
    01-12-2014, 07:51 AM Go to last post
  7. Please advise me on the best kind of regression for ordinal data which was factored

    I started with a large number of Likert-type questions containing 5-point attitude scores. I then ran these questions through principal component...

    Started by memomemootoo‎, 01-11-2014 03:39 PM
    • Replies: 0
    • Views: 1,864
    01-11-2014, 03:39 PM Go to last post
  8. Which test should I use?

    Hi all! I'm studying the expression of C-Fos (a stress hormone) in mice brains. Basically, I'm analysing one specific area of the brain and I...

    Started by OlivierJoyal‎, 01-11-2014 02:50 PM
    anova, spss
    • Replies: 2
    • Views: 1,269
    01-11-2014, 03:30 PM Go to last post
  9. Need help choosing statistical test

    Hey, I am conducting a study for my dissertation and I would like to know whether binge drinkers scored worse than non-binge drinkers on 3...

    Started by LehcarP‎, 01-10-2014 03:59 PM
    • Replies: 1
    • Views: 1,494
    01-10-2014, 05:03 PM Go to last post
  10. Exploratory Study -- ordinal data questions

    Hello all, I’m a first time poster but have gained much insight reading through past threads. I’m running an exploratory study, containing a few...

    Started by JB12‎, 01-10-2014 10:11 AM
    ordinal data
    • Replies: 3
    • Views: 2,094
    01-10-2014, 12:22 PM Go to last post
  11. Scale conversion based on previous research

    Hello, I am using an agent-based model to simulate emotional contagion in teams. I have an article that has determined the "shift" of within person...

    Started by Chauny27‎, 01-09-2014 05:48 PM
    • Replies: 0
    • Views: 2,026
    01-09-2014, 05:48 PM Go to last post
  12. Methods for verifying intependent variable integrity. How?

    Can you help me by describing a few methods for verifying independent variable integrity in single subject experiments? Thank you! :)

    Started by AllieViet‎, 01-09-2014 01:06 PM
    independent variable, integrity, single subject experiment
    • Replies: 0
    • Views: 1,390
    01-09-2014, 01:06 PM Go to last post
  13. 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: 2,224
    01-09-2014, 09:13 AM Go to last post
  14. 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: 1,476
    01-08-2014, 07:19 AM Go to last post
  15. 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: 2,575
    01-07-2014, 11:59 AM Go to last post
  16. 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: 1,064
    01-07-2014, 11:31 AM Go to last post
  17. 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: 1,268
    01-01-2014, 08:48 PM Go to last post
  18. 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: 2,026
    12-23-2013, 09:17 AM Go to last post
  19. 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: 6,806
    12-22-2013, 08:45 AM Go to last post
  20. 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: 1,530
    12-18-2013, 11:36 PM Go to last post
  21. 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: 1,784
    12-17-2013, 02:55 PM Go to last post
  22. 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: 1,863
    12-17-2013, 02:38 PM Go to last post
  23. 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: 1,181
    12-17-2013, 01:00 PM Go to last post
  24. 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: 1,701
    12-16-2013, 04:24 PM Go to last post
  25. 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: 1,244
    12-16-2013, 05:32 AM Go to last post
  26. 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: 1,959
    12-15-2013, 12:19 AM Go to last post
  27. 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: 1,311
    12-12-2013, 04:02 AM Go to last post
  28. 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: 1,001
    12-11-2013, 05:20 AM Go to last post
  29. 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: 2,208
    12-09-2013, 01:28 AM Go to last post
  30. 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: 1,723
    12-07-2013, 11:06 AM Go to last post
  31. 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: 1,832
    12-05-2013, 10:53 AM Go to last post
  32. 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: 1,777
    12-04-2013, 10:50 PM Go to last post
  33. 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: 1,276
    12-04-2013, 08:14 AM Go to last post
  34. 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: 1,177
    12-04-2013, 03:06 AM Go to last post
  35. 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: 978
    12-03-2013, 12:38 PM Go to last post
  36. 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: 810
    11-28-2013, 07:10 AM Go to last post
  37. 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: 1,010
    11-28-2013, 05:04 AM Go to last post
  38. 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: 1,335
    11-27-2013, 07:30 AM Go to last post
  39. 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: 1,125
    11-26-2013, 08:15 AM Go to last post
  40. 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: 1,284
    11-25-2013, 02:29 PM Go to last post
  41. 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: 1,272
    11-24-2013, 05:32 PM Go to last post
  42. (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: 1,327
    11-22-2013, 10:59 AM Go to last post
  43. 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: 2,647
    11-22-2013, 03:31 AM Go to last post
  44. [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: 1,937
    11-21-2013, 04:22 PM Go to last post
  45. 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: 1,223
    11-21-2013, 07:08 AM Go to last post
  46. 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: 1,557
    11-20-2013, 04:40 PM Go to last post
  47. 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: 1,877
    11-20-2013, 10:50 AM Go to last post
  48. 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: 1,332
    11-20-2013, 08:22 AM Go to last post
  49. 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: 1,257
    11-20-2013, 04:01 AM Go to last post
  50. 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: 1,103
    11-19-2013, 03:48 PM Go to last post
  51. 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: 2,073
    11-19-2013, 03:28 PM Go to last post
  52. 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: 1,226
    11-19-2013, 08:55 AM Go to last post
  53. 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: 986
    11-18-2013, 01:23 PM Go to last post
  54. 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: 1,555
    11-18-2013, 10:38 AM Go to last post
  55. 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: 4,288
    11-18-2013, 08:43 AM Go to last post
  56. 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: 2,142
    11-16-2013, 04:10 PM Go to last post
  57. 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: 1,142
    11-15-2013, 08:08 AM Go to last post
  58. 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: 860
    11-14-2013, 08:50 PM Go to last post
  59. 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: 1,571
    11-14-2013, 04:38 PM Go to last post
  60. 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: 1,073
    11-13-2013, 11:09 AM Go to last post

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