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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: 25,985
    11-10-2005, 12:21 AM Go to last post
  1. Lightbulb NLSY79 Help - Longitudinal data in STATA

    Hey, guys. I'm trying to use the National Longitudinal Survey Year 1979 data set in a multiple regression model. The data set has data from...

    Started by chickensandllamas‎, 04-24-2013 04:12 PM
    • Replies: 0
    • Views: 1,149
    04-24-2013, 04:12 PM Go to last post
  2. Regression Analysis with Dichotomous and Continuous Independent Variable .

    Hello everyone! Your help is greatly appreciated. I have run a 3 x 2 factor between-participants ANOVA in SPSS, but my analysis yielded no...

    Started by David88‎, 04-22-2013 02:54 PM
    • Replies: 2
    • Views: 2,783
    04-24-2013, 07:14 AM Go to last post
  3. Multilevel time series versus time series ARIMA models etc. Need help!!

    Hi guys, Does someone knows the difference between multilevel time series analysis and the time serie ARIMA models etc.; or is it approximately...

    Started by emmab1990‎, 04-23-2013 05:25 PM
    • Replies: 3
    • Views: 1,703
    04-24-2013, 01:41 AM Go to last post
  4. Exclamation Requesting Help with Dissertation

    Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

    Started by orvokki‎, 04-23-2013 04:12 AM
    • Replies: 0
    • Views: 680
    04-23-2013, 04:12 AM Go to last post
  5. SPSS - Independent t-test (Desperate for help!)

    I am currently trying to complete my results section for my dissertation, I am looking at gender differences in attitudes towards domestic abuse. I...

    Started by Becca91‎, 04-16-2013 05:20 AM
    • Replies: 3
    • Views: 844
    04-23-2013, 12:59 AM Go to last post
  6. Face validity VS Content Validity

    Dear respected members, I'm developing an instrument to measure care dependency in home dwelling elderly. I want to test the validity of the...

    Started by febriana_zz‎, 04-21-2013 01:17 AM
    content validity, face validity, interpretability
    • Replies: 0
    • Views: 2,444
    04-21-2013, 01:17 AM Go to last post
  7. Missing Data

    Hi :wave:, I have a database that I am using data imputation techniques, but is not a normal matrix to apply a multivariate normal test, my question...

    Started by adejota‎, 04-20-2013 05:41 PM
    little's, missing data analysis, missing data imputation
    • Replies: 0
    • Views: 884
    04-20-2013, 05:41 PM Go to last post
  8. mean or median for reaction times?

    Hi all, I have two groups who made a simple detection task in which reaction times was the only dependent variable (observed in different...

    Started by .elena.‎, 04-19-2013 04:04 AM
    • Replies: 2
    • Views: 2,805
    04-19-2013, 09:03 AM Go to last post
  9. finding the effect of X on the relationship between Y and Z

    I had a huge explanation and it got deleted, so here's a briefer version: I'm trying to find whether high trait empathy predicts a greater effect...

    Started by cairoan‎, 04-18-2013 07:00 PM
    correlation, problem, regression, science
    • Replies: 0
    • Views: 1,132
    04-18-2013, 07:00 PM Go to last post
  10. Research methods - Comparing high and low risk sports

    I am currently conducting a piece of research that aims to find if there is a difference between personality traits between participants of high and...

    Started by dannydoy‎, 04-18-2013 12:37 PM
    • Replies: 2
    • Views: 754
    04-18-2013, 12:59 PM Go to last post
  11. Help with which type of ANOVA to use?!

    Hello, I'm trying to figure out which type of ANOVA I'd use in this situation. My question involves 3 different groups with measurements taken at...

    Started by amycardinal‎, 04-13-2013 07:49 PM
    anova, help needed, repeated measures
    • Replies: 2
    • Views: 1,084
    04-18-2013, 11:51 AM Go to last post
  12. How do you report Effect sizes for ANCOVA?

    For ANOVA effect sizes you report n2 (in the correct format) but what do you do for effect sizes of ANCOVA? is it n2, r or r2??? Please HELP!

    Started by emmaPex‎, 04-18-2013 09:11 AM
    • Replies: 1
    • Views: 2,036
    04-18-2013, 09:22 AM Go to last post
  13. What should I do with this data?

    Hello, I am a work psychologist and have been asked to evaluate some data as part of my job. I rarely get the opportunity to do something like...

    Started by Psychobabblist‎, 04-17-2013 12:21 PM
    • Replies: 1
    • Views: 888
    04-18-2013, 02:33 AM Go to last post
  14. Awful Design - how to handle it ?

    Dear all, I have data from an experiment with what I think is an awful design. I need to type it into Excel (or directly into a statistical...

    Started by Yankel‎, 04-15-2013 06:59 AM
    • Replies: 8
    • Views: 1,242
    04-17-2013, 12:18 AM Go to last post
  15. combining two scales with different number of items into one measurement

    Hi, I have two different scales that measure children's' exposure to family violence. One is based on children's report on a single item, the other...

    Started by shiradvir‎, 04-16-2013 05:38 AM
    • Replies: 5
    • Views: 2,362
    04-16-2013, 08:45 AM Go to last post
  16. Maximum Likelihood Estimation, Ordered Logit

    Just a quick question, which might or might not be interesting. If attempting to estimate paramaters of a multinominal logit model by maximum...

    Started by tahslacks‎, 04-16-2013 05:20 AM
    • Replies: 0
    • Views: 860
    04-16-2013, 05:20 AM Go to last post
  17. Exclamation Multiple Linear Regression

    Hi all, Any help on this question would mean the absolute world to me. I have been in the emergency room with my boyfriend for the past 56 hours...

    Started by woodenspoon‎, 04-15-2013 03:40 AM
    • Replies: 3
    • Views: 1,809
    04-15-2013, 06:57 AM Go to last post
  18. Relative size of a p-value for a second hypothesis, compared to the first.

    Hi all, I apologise in advance if this is a very easy question - I may be struggling with the wording, or I might just be a bit slow. The...

    Started by hopeless.at.statistics‎, 04-14-2013 12:43 AM
    correlation, hypothesis test, relative size
    • Replies: 0
    • Views: 1,132
    04-14-2013, 12:43 AM Go to last post
  19. Likert scale, parametric or nonparametric?

    Hello, first post here. I apologize if it is a stupid question (but then again, that'll make it easier to answer:)) I am training to be a...

    Started by 11jono11‎, 12-11-2010 10:02 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 19,126
    04-13-2013, 06:43 PM Go to last post
  20. to use parametric or non-parapetric

    Hi Everyone, If anybody could help or offer any suggestions I would be extremely grateful for my Thesis I am looking at the relationship between...

    Started by 182BECKY‎, 04-13-2013 11:31 AM
    • Replies: 0
    • Views: 1,033
    04-13-2013, 11:31 AM Go to last post
  21. Non-parametric Chi-square test outputs *different* when order is reversed?

    Hello, I am a physics graduate student and am conducting research on physics learning and teaching. I surveyed n=63 students Likert scale 1 to 4...

    Started by snowfalcon_cu‎, 04-11-2013 08:57 AM
    chi-square, non-parametric test, spss
    • Replies: 5
    • Views: 1,277
    04-12-2013, 05:20 AM Go to last post
  22. non-parametric ANCOVA?

    Dear all, I would appreciate any help on a much debated issue of non-parametric ANCOVA. I compare 2 gourps (group is a factor, categorical), y...

    Started by akh‎, 04-11-2013 06:17 AM
    ancova, non-parametric
    • Replies: 7
    • Views: 5,557
    04-11-2013, 01:11 PM Go to last post
  23. non-parametric equivalence /non-inferiority test for ratio variable?

    Good day , I'm comparing subjects' success rates in two conditions A and B. All subjects run both conditions, so the data is paired. Each subject...

    Started by akh‎, 04-11-2013 06:01 AM
    equivalence testing, non-inferior, non-parametric, ratio
    • Replies: 0
    • Views: 1,215
    04-11-2013, 06:01 AM Go to last post
  24. Confidence intervals. Correct interpretation?

    Hi there, I am hoping someone can let me know if I have made the correct inferences regarding confidence intervals on a Pearson correlation...

    Started by Maybel‎, 04-08-2013 09:52 PM
    • Replies: 2
    • Views: 1,910
    04-09-2013, 07:58 PM Go to last post
  25. Chi-square help

    hey guys I need help! I need to make a background research on a chi-square test of independence and I'm having trouble getting the two nominal...

    Started by randya456‎, 04-09-2013 07:45 AM
    • Replies: 1
    • Views: 911
    04-09-2013, 08:04 AM Go to last post
  26. Help needed with 3 condition mixed design stats (ANOVA / T-TEST?)

    Hi, I have conducted an experiment on short-term media violence using a GSR machine (measures physiological response) and questionnaire. The aim...

    Started by Psychostats‎, 04-06-2013 08:38 AM
    • Replies: 6
    • Views: 1,312
    04-09-2013, 04:59 AM Go to last post
  27. 4 X 2 Chi Square with small n

    I'm trying to run a chi-square looking at ethnicity (4) across group (3). Some of my cells have less than n = 5. I've been unable to locate any...

    Started by evrobinson‎, 03-29-2013 10:10 PM
    • Replies: 3
    • Views: 1,202
    04-08-2013, 08:16 AM Go to last post
  28. Question Need help for ANOVA test !!

    Hi guys ! Hope everyone is all good ! My question: I conducted a mixed design ANOVA for my experiment. My SD/Mean and interaction graph...

    Started by psychtalk‎, 04-06-2013 07:40 AM
    • Replies: 1
    • Views: 844
    04-08-2013, 08:14 AM Go to last post
  29. Help with hypothesis

    I came across this forum when searching for help with my homework. I have to write a simple correlation hypothesis and a mediation hypothesis. I...

    Started by Agape000‎, 04-06-2013 09:55 PM
    • Replies: 0
    • Views: 908
    04-06-2013, 09:55 PM Go to last post
  30. Interpretation of Monte Carlo Significance for Chi-Square Analysis

    I am currently utilizing a 4x7 chi-square and cannot collapse any columns or rows, resulting in expected cell counts of less than 5 in 14 cells...

    Started by Psychology.Christine‎, 04-05-2013 09:33 PM
    chi-square, exact tests, interpretation, monte carlo
    • Replies: 0
    • Views: 1,780
    04-05-2013, 09:33 PM Go to last post
  31. Testing for homogeneity of variance for a LARGE sample

    I am wondering if someone can help me determine if I have met the assumption of homogeneity of variance within a sample size of 5,000. I have read...

    Started by PikeyJM‎, 04-04-2013 05:37 PM
    • Replies: 1
    • Views: 1,636
    04-05-2013, 09:33 AM Go to last post
  32. multiple mediators and multiple dvs - different results AMOS and MEDIATE (Hayes)

    I have a path model (longitudinal data): 1 independent variable (iv), 4 potential mediators (ms), 4 dependent variables (dvs); I compared models (chi...

    Started by AnneBaeuerle‎, 04-05-2013 08:33 AM
    amos, mediate macro, mediation
    • Replies: 0
    • Views: 1,964
    04-05-2013, 08:33 AM Go to last post
  33. Question is there a Fisher's exact test (or similar) for continuous data?

    I have a simple statistical problem, but am having a hard time identifying a good solution. I am interested in testing to see if an independent...

    Started by abaugh‎, 04-02-2013 05:13 PM
    continuous dv, fisher's exact test
    • Replies: 3
    • Views: 3,754
    04-04-2013, 08:16 PM Go to last post
  34. Comparing results presented as percents. Best method

    Hi folks, I was wondering if you could help me wrap my head around the best way to present some data and the best statistical test to use to...

    Started by Midsummer333‎, 04-03-2013 06:43 PM
    comparisons, hypothesis testing, percentages, psychology
    • Replies: 1
    • Views: 811
    04-04-2013, 07:37 AM Go to last post
  35. Number of Human Subjects

    I'm a high school student, state science fair is coming up, and I've got to make my project the best it can be. Why isn't it already the best it can...

    Started by Sora57‎, 04-03-2013 10:41 PM
    • Replies: 1
    • Views: 1,011
    04-04-2013, 05:27 AM Go to last post
  36. Utilizing Individual Data Points in an ANOVA, Reliability, Replication

    Hi all. Suppose you are conducting a study with n=10 subjects. Each subject runs through a behavioural experiment for treatment A and treatment...

    Started by jeffbruce‎, 03-28-2013 12:14 PM
    anova, average, reliability, replication
    • Replies: 1
    • Views: 762
    04-03-2013, 08:30 PM Go to last post
  37. Beyond a t-test repeated measures to evaluate scales scores after reeducation ?

    Hi, i'd like to have your advice about statistics methods to apply in my resaerch. I have seven subjects who have been evaluated twice...

    Started by telepro‎, 04-03-2013 07:06 AM
    • Replies: 0
    • Views: 704
    04-03-2013, 07:06 AM Go to last post
  38. How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs?

    How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs? IVS: I manipulated race of a job candidate (black or white) as well as the...

    Started by norajones‎, 04-03-2013 12:22 AM
    • Replies: 0
    • Views: 1,407
    04-03-2013, 12:22 AM Go to last post
  39. Question Requesting Help with Dissertation

    Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

    Started by orvokki‎, 03-28-2013 02:58 AM
    • Replies: 1
    • Views: 828
    04-01-2013, 05:32 PM Go to last post
  40. Mixed Model ANOVA Error terms

    Can someone show me, or point me to a resource, that would show how to compute the resulting Error sums of squares that would be produced in a...

    Started by DrJBN‎, 03-27-2013 11:37 AM
    anova, error terms, mixed
    • Replies: 3
    • Views: 1,224
    04-01-2013, 11:48 AM Go to last post
  41. P values, correlation analysis and sample size.

    Hi all, A question regarding the relationship between p values, correlation analysis and sample size... If I obtain a p = .036 for a...

    Started by Jasmine‎, 03-23-2012 06:42 AM
    • Replies: 8
    • Views: 22,241
    03-31-2013, 09:55 PM Go to last post
  42. By subjects versus by items - Also: Bots rule

    hi, I am doing some stats work at the moment and I have run mixed ANOVA's for both subject and item analysis, but they have come up showing...

    Started by resresd‎, 03-31-2013 10:44 AM
    • Replies: 3
    • Views: 842
    03-31-2013, 05:23 PM Go to last post
  43. Exclamation SPSS Help! What tests to use?

    Hello friends! I am currently analysing some data I have collected about some patients, which includes their demographics and scale ratings based...

    Started by oneleggedalbinopigeon‎, 03-27-2013 04:58 PM
    psychology, spss, statistics, test data
    • Replies: 0
    • Views: 615
    03-27-2013, 04:58 PM Go to last post
  44. Differing Wilk's p values bwteen factors and subscales?

    HI, I am conducting a normality analysis on a paper and pencil test psychological . The test has main factors and sub-scales. The factor score is...

    Started by statdane‎, 03-27-2013 08:47 AM
    • Replies: 0
    • Views: 645
    03-27-2013, 08:47 AM Go to last post
  45. spss - crisis in psychology

    Hello Everyone! I am begging for help!!! i have stupid questions just to make sure i am going in the right direction. I have three questionnaires...

    Started by LuckyKate‎, 03-25-2013 01:29 PM
    • Replies: 1
    • Views: 700
    03-25-2013, 01:50 PM Go to last post
  46. HLM how do I insert control variables on level 1 and on level 2?

    Hi, I´m a beginner, so I´d be greatful for help. I use HLM 7: MY model: employees nested in organizations y= individual´s wellbeing...

    Started by paulina‎, 03-25-2013 10:44 AM
    control variables, fixed effects, hlm, multilevel
    • Replies: 0
    • Views: 1,862
    03-25-2013, 10:44 AM Go to last post
  47. [r] coefficient that compares ellipses

    I'm working on an undergraduate dissertation in Phonetics. (I am on a Linguistics programme so my knowledge of Statistics and Maths in general is...

    Started by jrodd‎, 03-24-2013 09:34 AM
    • Replies: 0
    • Views: 737
    03-24-2013, 09:34 AM Go to last post
  48. Gpower report help

    I am very stuck and wiould really appriciate if someone could read over my results section to make sure I am along the right lines?

    Started by rjf8383‎, 03-23-2013 03:26 PM
    • Replies: 1
    • Views: 650
    03-23-2013, 04:52 PM Go to last post

    Hi, I am a bit confused as to which variables should I include in the factor analysis. I have a huge questionnaire which i know i definitely...

    Started by Astero‎, 03-20-2013 06:14 PM
    demographics, factor analysis, principal components
    • Replies: 3
    • Views: 1,122
    03-22-2013, 01:38 PM Go to last post
  50. Factorial ANCOVA on reaction times (model using R)

    Hello everyone, I'm currently working on a project in psycholinguistics : we measure RTs in an auditive lexical decision task to determine wether...

    Started by carabosse‎, 03-13-2013 02:50 PM
    • Replies: 1
    • Views: 1,660
    03-21-2013, 03:13 AM Go to last post
  51. Problems with survey answers - answers in wrong spot, inconsistencies in responses

    Thank for all your help, sorry this is so long. I created my own survey as part of my dissertation and have run into problems with responses...

    Started by nerdboy2317‎, 03-20-2013 03:26 PM
    • Replies: 0
    • Views: 588
    03-20-2013, 03:26 PM Go to last post
  52. Can I calculate a pooled Standard Deviation with this information?

    This has left me very frustrated, especially as I believe it to be a very straightforward calculation for a completely standard problem. In the...

    Started by Bevers‎, 03-20-2013 10:47 AM
    • Replies: 0
    • Views: 2,185
    03-20-2013, 10:47 AM Go to last post
  53. Journal Article - which research method used? (Case-control?)

    Heys guys, I am trying to figure out the experimental method used in an article...

    Started by hermes014‎, 03-11-2013 01:11 PM
    • Replies: 6
    • Views: 1,136
    03-19-2013, 04:55 PM Go to last post
  54. Is a time series model the most appropriate to answer my questions

    I would like to know if I should analyze my data using a time series model (ARMA,...). Context: I want to test a detailed language grid-analysis...

    Started by DaBow‎, 03-19-2013 01:17 PM
    time series analysis
    • Replies: 0
    • Views: 671
    03-19-2013, 01:17 PM Go to last post
  55. Analysing ranked answers


    Started by 50footwoman‎, 03-19-2013 07:47 AM
    help neded, psychology, ranks, statistics, telepathy
    • Replies: 0
    • Views: 651
    03-19-2013, 07:47 AM Go to last post
  56. Missing Value Analysis, Little's test sig (so not MCAR), how to tell if MAR or MNAR?

    Hi Everyone, I have a 7 variable dataset with 500+ participants, and 5.5% of values are missing for a single variable (V7). I'm using SPSS. I...

    Started by Statsallgood‎, 03-18-2013 04:21 PM
    little's, mar, mcar, missing value, mnar
    • Replies: 1
    • Views: 6,905
    03-18-2013, 04:27 PM Go to last post
  57. Desperate for help ASAP

    A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student...

    Started by starfire117‎, 03-16-2013 08:16 PM
    • Replies: 4
    • Views: 1,999
    03-17-2013, 09:09 AM Go to last post
  58. Bad fitting models - what to do next?

    In my study I was doing studying attitudes and their influence on eachother using existing 7-point likert scales. To goal was to models these...

    Started by MrJP‎, 03-14-2013 10:40 AM
    fit indices, reporting statistics, structural equation model
    • Replies: 3
    • Views: 3,769
    03-15-2013, 02:28 PM Go to last post
  59. Very Urgent, please help

    In order to determine the relationship among variables, a Pearson product-moment correlation coefficient matrix was computed pretest measures....

    Started by shiva‎, 03-15-2013 06:56 AM
    • Replies: 1
    • Views: 684
    03-15-2013, 08:59 AM Go to last post
  60. Multiple comparisons of economic game data

    Hi, Any help would be greatly appreciated! I am analyzing some data to which I think I need to make some kind of multiple comparisons correction....

    Started by JonoBone‎, 02-28-2013 07:49 AM
    bonferroni, corrections, multiple comparisons
    • Replies: 1
    • Views: 647
    03-14-2013, 12:31 AM Go to last post

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