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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: 26,084
    11-10-2005, 12:21 AM Go to last post
  1. Question Relative and absolute bias - Likert-type data

    I'm working on a data set which was collected through a questionnaire by a certain regulatory institution. 50 institutions (whole population of that...

    Started by ajvar‎, 01-24-2014 04:25 AM
    absolute, bias, likert, relative
    • Replies: 1
    • Views: 1,791
    01-27-2014, 07:21 AM Go to last post
  2. Is it okay to allow insignificantly correlated error terms in SEM models

    Hi, I am running an SEM model and I am allowing two error terms to be correlated because their indicators come from the same test. The correlation...

    Started by myautumn28‎, 01-23-2014 01:55 PM
    • Replies: 4
    • Views: 2,706
    01-24-2014, 06:26 PM Go to last post
  3. URGENT** ANOVA or Regression - Please help

    Hi, I would really appreciate some help with this. I am looking to see if employees' organisational history (such as voluntary/involuntary turnover)...

    Started by CA92‎, 01-24-2014 10:50 AM
    anova, assumptions, levene, levene's test, regression analysis
    • Replies: 0
    • Views: 786
    01-24-2014, 10:50 AM Go to last post
  4. Decomposing ANOVAs - several questions...

    Hi everyone, I am rather unclear about several aspects of how decomposition of effects in ANOVAs should be done. I'll try to phrase these doubts...

    Started by wildetudor‎, 12-18-2013 06:41 PM
    • Replies: 6
    • Views: 1,929
    01-23-2014, 04:45 AM Go to last post
  5. propensity score matching (chatbox conversation)

    01/22 17:35 Jake: i have never studied PSM in any detail but the wikipedia-level summaries i have read make it sound like exactly the same thing as...

    Started by Jake‎, 01-22-2014 08:12 PM
    • Replies: 1
    • Views: 1,159
    01-22-2014, 10:01 PM Go to last post
  6. Best Omnibus in Lieu of Multiple Ind.-Samples t-Tests

    Howdy Stats Talkers, I was hoping you guys might be able to help me figure out which statistical technique would be best here. I'm analyzing data...

    Started by avantgardener‎, 01-13-2014 08:01 AM
    • Replies: 4
    • Views: 1,107
    01-21-2014, 12:00 PM Go to last post
  7. which statistical analysis is suitable for this study?

    Hi guys, Briefly describing the study: - 1 IV with three levels (boring, neutral, & fun condition) - 3 DV's (time perception, task rating,...

    Started by buket93‎, 01-19-2014 01:42 PM
    psychology, reporting statistics, research design
    • Replies: 1
    • Views: 922
    01-21-2014, 03:26 AM Go to last post
  8. Should this really be an ANOVA study?

    Hi, I am running a between subjects study for my senior capstone. I will be looking at smell accuracy in either the right or left nostril of my...

    Started by shayriv‎, 01-19-2014 11:07 PM
    • Replies: 2
    • Views: 844
    01-21-2014, 03:22 AM Go to last post
  9. Which model fit indices should I use?

    I am trying to use multi-group CFA to evaluate measurement invariance of a new scale. The scale is 5 items (scores for each item range from 0-112...

    Started by mem162000‎, 01-20-2014 11:37 AM
    • Replies: 2
    • Views: 1,058
    01-21-2014, 03:13 AM Go to last post
  10. Extrapolating percentile ranks?

    Hi all, I have a feeling my question has a simple answer but I've searched and searched and cannot find it anywhere, perhaps you can help! I...

    Started by nineotwo‎, 01-19-2014 02:18 PM
    • Replies: 0
    • Views: 1,518
    01-19-2014, 02:18 PM Go to last post
  11. Use z-scores in Repeated Measures ANCOVA?

    Hi everyone, My dissertation has participants answer three questions at four different timepoints in a video. For each timepoint, I have averaged...

    Started by rkprice‎, 12-18-2013 07:51 AM
    ancova, repeated measures, standardize, z-scores
    • Replies: 1
    • Views: 1,866
    01-18-2014, 09:13 PM Go to last post
  12. correlated dependent variables with repeated measures

    Should I use classic repeated measures, classic MANOVA, mixed model or none of the above? Study: IV treatment - dichotomous - treatment or...

    Started by alisa‎, 12-27-2013 07:35 AM
    • Replies: 1
    • Views: 1,275
    01-18-2014, 09:08 PM Go to last post
  13. Is a factorial design appropriate here?

    My study will investigate children's vocabulary development during parent-mediated interactive electronic storybook reading. I want to design 6...

    Started by bernardpar‎, 01-17-2014 08:49 AM
    • Replies: 3
    • Views: 1,157
    01-17-2014, 10:09 AM Go to last post
  14. 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: 945
    01-17-2014, 01:45 AM Go to last post
  15. 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: 1,198
    01-15-2014, 06:06 PM Go to last post
  16. 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: 1,271
    01-14-2014, 01:17 PM Go to last post
  17. 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: 1,528
    01-14-2014, 10:53 AM Go to last post
  18. Statistical significance of age difference between male and female subjects

    "The ages of the male group were 20.51.2 and the ages of the females 19.22.3. The difference in mean age between the groups is not...

    Started by wildetudor‎, 01-12-2014 09:30 AM
    • Replies: 4
    • Views: 1,715
    01-13-2014, 04:35 PM Go to last post
  19. 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: 1,341
    01-12-2014, 07:51 AM Go to last post
  20. 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: 995
    01-11-2014, 03:39 PM Go to last post
  21. 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: 773
    01-11-2014, 03:30 PM Go to last post
  22. 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: 722
    01-10-2014, 05:03 PM Go to last post
  23. Exploratory Study -- ordinal data questions

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

    Started by JB12‎, 01-10-2014 10:11 AM
    ordinal data
    • Replies: 3
    • Views: 1,152
    01-10-2014, 12:22 PM Go to last post
  24. 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: 1,093
    01-09-2014, 05:48 PM Go to last post
  25. 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: 707
    01-09-2014, 01:06 PM Go to last post
  26. 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: 1,311
    01-09-2014, 09:13 AM Go to last post
  27. 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: 787
    01-08-2014, 07:19 AM Go to last post
  28. 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: 1,707
    01-07-2014, 11:59 AM Go to last post
  29. 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: 615
    01-07-2014, 11:31 AM Go to last post
  30. 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: 819
    01-01-2014, 08:48 PM Go to last post
  31. 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: 1,056
    12-23-2013, 09:17 AM Go to last post
  32. 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: 4,829
    12-22-2013, 08:45 AM Go to last post
  33. 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: 1,039
    12-18-2013, 11:36 PM Go to last post
  34. 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: 1,230
    12-17-2013, 02:55 PM Go to last post
  35. 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: 951
    12-17-2013, 02:38 PM Go to last post
  36. 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: 760
    12-17-2013, 01:00 PM Go to last post
  37. 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: 958
    12-16-2013, 04:24 PM Go to last post
  38. 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: 732
    12-16-2013, 05:32 AM Go to last post
  39. 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: 1,167
    12-15-2013, 12:19 AM Go to last post
  40. 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: 802
    12-12-2013, 04:02 AM Go to last post
  41. 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: 626
    12-11-2013, 05:20 AM Go to last post
  42. 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: 1,268
    12-09-2013, 01:28 AM Go to last post
  43. 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: 1,177
    12-07-2013, 11:06 AM Go to last post
  44. 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: 916
    12-05-2013, 10:53 AM Go to last post
  45. 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: 1,030
    12-04-2013, 10:50 PM Go to last post
  46. 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: 792
    12-04-2013, 08:14 AM Go to last post
  47. 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: 730
    12-04-2013, 03:06 AM Go to last post
  48. 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: 710
    12-03-2013, 12:38 PM Go to last post
  49. 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: 665
    11-28-2013, 07:10 AM Go to last post
  50. 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: 663
    11-28-2013, 05:04 AM Go to last post
  51. 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: 806
    11-27-2013, 07:30 AM Go to last post
  52. 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: 730
    11-26-2013, 08:15 AM Go to last post
  53. 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: 694
    11-25-2013, 02:29 PM Go to last post
  54. 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: 795
    11-24-2013, 05:32 PM Go to last post
  55. (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: 888
    11-22-2013, 10:59 AM Go to last post
  56. 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: 1,775
    11-22-2013, 03:31 AM Go to last post
  57. [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: 1,074
    11-21-2013, 04:22 PM Go to last post
  58. 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: 695
    11-21-2013, 07:08 AM Go to last post
  59. 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: 930
    11-20-2013, 04:40 PM Go to last post
  60. 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: 1,041
    11-20-2013, 10:50 AM Go to last post

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