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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, 11-09-2005 11:21 PM
    • Replies: 0
    • Views: 15,813
    11-09-2005, 11:21 PM Go to last post
  1. Help with the level of measurement for correct/incorrect answers

    Please, help bring in some lucidity and fill in any possible gaps in my reasoning. The research assessed the participants' recall of a narrative...

    Started by Billy the Poet‎, 09-01-2015 06:04 PM
    categorical, dichotomous, level of measurement, logit
    • Replies: 11
    • Views: 229
    Today, 02:01 PM Go to last post
  2. What statistical analysis to use?

    HI, Each of the participants completed 7 tasks. I collected several measures in each task (like answer correctness, perception of difficulty, time...

    Started by Sam31‎, 08-31-2015 11:11 AM
    • Replies: 1
    • Views: 143
    09-01-2015, 03:05 AM Go to last post
  3. Forest plot help

    Hello there, I am calculating effect sizes for a forest plot. The RCTs I am using each have several outcome measures (e.g. PARS, SRS, ADIS, MASC,...

    Started by Reda_Johnson‎, 08-28-2015 09:40 AM
    • Replies: 0
    • Views: 207
    08-28-2015, 09:40 AM Go to last post
  4. measuring Construct Validity

    Hi! I'm reviewing a psychological assessment battery that is currently under preparation, and am concerned about the method used by the developers to...

    Started by cLEE‎, 08-27-2015 02:05 AM
    • Replies: 2
    • Views: 139
    08-28-2015, 06:55 AM Go to last post
  5. Need help planning analysis of longitudinal survey data

    Hi all, I'm working on a project that is investigating a number of things about art teachers in the years following their completing of a...

    Started by scottwc‎, 08-27-2015 11:48 PM
    • Replies: 1
    • Views: 99
    08-28-2015, 12:03 AM Go to last post
  6. repeated measure with some people quit in mid-way

    Never mind. Got answered from another SPSS forum.

    Started by fengyuwuzu‎, 08-27-2015 03:26 PM
    • Replies: 4
    • Views: 160
    08-27-2015, 06:15 PM Go to last post
  7. Data fit for latent profile analyses?

    I was wondering on how you decide whether data is suitable for latent profile analysis. By that I mean both the assumptions that need to be met, and...

    Started by bramv‎, 08-27-2015 08:55 AM
    latent profile anaysis
    • Replies: 0
    • Views: 115
    08-27-2015, 08:55 AM Go to last post
  8. Repeated Measure ANOVA with muliple samples per participant

    I am currently doing an experiment where I measure the time it takes for a participant to complete a task. There are 7 different modes for the task...

    Started by blooop‎, 08-25-2015 12:35 PM
    anova, repeat measures, spss
    • Replies: 2
    • Views: 185
    08-25-2015, 02:37 PM Go to last post
  9. Compare multiple measures in a one-within dyad design

    Hello everyone, I have a dataset of 50 heterosexual couples, in which the women have a medical condition and the men do not. This suggest that I...

    Started by psantos‎, 08-25-2015 11:39 AM
    • Replies: 0
    • Views: 99
    08-25-2015, 11:39 AM Go to last post
  10. Question Which Statistical method or test to use ?

    Hello, Currently I am pursuing a degree in Psychology through distance mode. I am studying on my own as of now and taking help of internet. The...

    Started by WARLOCK‎, 08-24-2015 02:40 PM
    • Replies: 1
    • Views: 167
    08-25-2015, 02:43 AM Go to last post
  11. Question Grand mean vs meaning individual data points?

    Hello, I'm running an experiment in which I take a measure (reaction time) repeatedly from a human subject. The reaction time is measured at 3...

    Started by bugsbunny‎, 08-21-2015 11:01 AM
    • Replies: 1
    • Views: 189
    08-21-2015, 11:04 AM Go to last post
  12. Too few responses to my questionnaire, sample too small for factor analysis?

    Hi there, For my MSc. dissertation, I've administered a questionnaire and only had 69 usable responses. The questionnaire is made up of 6 factors,...

    Started by katie8000‎, 08-09-2015 07:05 AM
    • Replies: 3
    • Views: 420
    08-19-2015, 12:44 PM Go to last post
  13. Mediation analysis for two correlated mediators

    Hey people, I am trying to find an appropriate mediation analysis method. I want to investigate how an INTERACTION of two variables mediates the...

    Started by Thorstenstats‎, 08-18-2015 10:04 AM
    interaction, mediation, mediation analysis, rstudio, statistic
    • Replies: 2
    • Views: 189
    08-18-2015, 01:47 PM Go to last post
  14. Dealing with a strong ordering effect

    Hello, I'm conducting a study in which people have to judge a perceptual effect (by rating it on a 10 point continous scale). I have three levels...

    Started by masch‎, 08-17-2015 04:00 AM
    experiment analysis, experiment design, order effects, ordering, perception
    • Replies: 0
    • Views: 189
    08-17-2015, 04:00 AM Go to last post
  15. Unequal variance

    I have a within group IV (before and after) and Between group DV (control and experimental) for 25 participants (I had a 40% attrition rate). All of...

    Started by M.Wilson‎, 08-14-2015 06:44 AM
    • Replies: 0
    • Views: 218
    08-14-2015, 06:44 AM Go to last post
  16. When the 3-way interaction is insignificant

    Hi, I have a 3 way-mixed design ANOVA. If the 3-way interaction is insignificant but all the 2-way are, can I still analyze them? If I have some...

    Started by Nko‎, 08-09-2015 03:07 AM
    • Replies: 1
    • Views: 185
    08-09-2015, 05:32 AM Go to last post
  17. R squared in structural equation modeling

    Hello I recently started working with structural equation modeling. I am doing a study for which I tested a model like this: Var1 --> var2-->...

    Started by Stef Van Puyenbroeck‎, 08-05-2015 06:24 AM
    r squared, sem, structural equation model
    • Replies: 6
    • Views: 289
    08-06-2015, 11:53 AM Go to last post
  18. Comparing means between sample and subsample

    I would like to compare the mean score on personality questionnaire between my total sample (n=97) and my subsample (n=44) to see if there is a...

    Started by An-KatrienDR‎, 08-05-2015 02:41 AM
    compare means, subsample
    • Replies: 6
    • Views: 214
    08-05-2015, 10:50 AM Go to last post
  19. Dichotomizing continuous variables for an EXPERIMENT not a survey

    I am aware of the many issues/pitfalls with splitting continuous variables in survey research. Nothing I have read addresses whether doing so to...

    Started by Curley‎, 06-08-2015 11:50 AM
    binning, dichotomizing variables, experiment design
    • Replies: 13
    • Views: 726
    08-04-2015, 05:13 PM Go to last post
  20. Null hypothesis significance testing in psychology research

    Interested in learning more.

    Started by JackB‎, 08-01-2015 04:19 AM
    • Replies: 9
    • Views: 368
    08-03-2015, 05:29 PM Go to last post
  21. R2 test with Model II error

    In Jacob Cohen's "Statistical power analysis for the behavioral science" (2nd edition, 1988), page 409, 411-412, it mentions a F test with Model II...

    Started by wangwang‎, 08-02-2015 03:37 PM
    • Replies: 3
    • Views: 185
    08-03-2015, 09:22 AM Go to last post
  22. Factor Analysis Question

    Hi, My research team and I ran two separate confirmatory factor analyses on two separate measures (same participants filled out both self-report...

    Started by Denver‎, 08-03-2015 01:09 AM
    • Replies: 0
    • Views: 136
    08-03-2015, 01:09 AM Go to last post
  23. understanding published results (a median of 0 ???)

    hello everyone, appoligies if this is a strange question but we can not grasp the meaning of the following statement published in an English paper....

    Started by daveroeuk‎, 07-30-2015 08:15 AM
    • Replies: 4
    • Views: 251
    07-30-2015, 10:16 AM Go to last post
  24. New to LCA please help with a methodological question

    Hello, I am new to LCA and attempting to design a secondary data study utilizing LCA as to show latent classes (subtypes) of a specific disorder...

    Started by derekcruise‎, 07-30-2015 01:44 AM
    lca
    • Replies: 0
    • Views: 160
    07-30-2015, 01:44 AM Go to last post
  25. Ordinal or interval survey response analysis (from a convenience sample)

    I have the responses from a survey where people had to provide a rating on a scale from one to five, where five was most positive side of things. I...

    Started by twotone4‎, 07-23-2015 03:35 PM
    convenience, interval, ordinal, standard deviation, survey
    • Replies: 9
    • Views: 410
    07-28-2015, 11:02 AM Go to last post
  26. Correct way to treat data for pearson correlation

    Hello everyone I run into the following issue - I had both teachers and pupils rate their beliefs on a likert scale from 1 to 6. I want to check...

    Started by Curious guy‎, 07-27-2015 05:54 AM
    • Replies: 3
    • Views: 186
    07-28-2015, 09:59 AM Go to last post
  27. Likert Scale Data Question

    Hi! I am working with Likert Scale Data (1-5) collected for two different sets of subjects. We have data collected from one school, at two...

    Started by jamesmartinn‎, 07-23-2015 07:22 AM
    • Replies: 2
    • Views: 202
    07-27-2015, 10:24 AM Go to last post
  28. Red face Between Subjects Experimental Design- How to analyse

    I have conducted an experiment with 2 conditions, 50 people in each condition. Each person completed a booklet of tasks and self-report measures (the...

    Started by lc1505‎, 07-27-2015 09:39 AM
    between subjects, between-group differences, experiment, mediation, psychology
    • Replies: 1
    • Views: 144
    07-27-2015, 10:17 AM Go to last post
  29. Types of interactions

    Hi, I am stuggling to find the right words for the statistical terms I would like to look up. Hope, you can help :-) I am looking at a higher...

    Started by liquidmodernity‎, 07-24-2015 06:49 AM
    correlation, higher order construct, interaction
    • Replies: 2
    • Views: 236
    07-27-2015, 08:46 AM Go to last post
  30. Presentation and interpretation of frequency data

    I carried out a study which involved going through a pathological cohort of 97 patient case files retrospectively and rating whether 21 behavioural...

    Started by jen_‎, 07-23-2015 02:24 AM
    • Replies: 2
    • Views: 159
    07-23-2015, 12:27 PM Go to last post
  31. Advice on which statistical test

    Dear Stats Friends I am a UK Clinical Psychology Trainee carrying out a small (5000 words) service improvement project based on where I am on...

    Started by rosenmarsh‎, 07-14-2015 06:19 AM
    • Replies: 8
    • Views: 523
    07-20-2015, 04:13 PM Go to last post
  32. Chi square and player order as a variable

    Hi all, I am getting myself in a muddle trying to use chi square correctly and hoping someone here can help. I am trying to see if there is an...

    Started by crapwithstats‎, 07-16-2015 01:49 AM
    • Replies: 2
    • Views: 359
    07-17-2015, 01:27 AM Go to last post
  33. Interpretation and reporting of dummy variables in causal model (Amos/SEM)

    I am using Amos to conduct SEM. The model I am running has a control variable with several categories for religion. I've used dummy variables to...

    Started by Gia2‎, 07-14-2015 08:24 PM
    • Replies: 3
    • Views: 354
    07-15-2015, 05:54 PM Go to last post
  34. 2 x 3 (Repeated Measures?) ANOVA

    Hi guys! I would be very grateful if someone could just doublecheck my choice of data analysis. This is for a dissertation, and I do not have the...

    Started by somethingwithchocolate‎, 07-14-2015 05:58 AM
    2x3 design, repeated measures anova
    • Replies: 0
    • Views: 183
    07-14-2015, 05:58 AM Go to last post
  35. Help with interpretation

    Hi All, Here is what i need help with. I am working with small sample size and this is the result so far. X and Y are not correlated ; however,...

    Started by arps‎, 07-12-2015 06:22 AM
    correlation, multiple regression
    • Replies: 4
    • Views: 311
    07-13-2015, 11:08 AM Go to last post
  36. Comparing two groups with two data sets? Is multiple regression test conveniant

    Hi I was wondering if someone could direct me to the right area.. I have currently done my research, where I wanted to find out the causal...

    Started by fifa786‎, 07-12-2015 10:03 PM
    • Replies: 0
    • Views: 187
    07-12-2015, 10:03 PM Go to last post
  37. Comparing three percentages (not means) which test [spss]

    Hello I wonder if you can help I am having trouble working out which statistical test to use. I have conducted a TMS study with four participants....

    Started by AbbyBradWest‎, 07-11-2015 06:46 AM
    • Replies: 0
    • Views: 178
    07-11-2015, 06:46 AM Go to last post
  38. Chi Square and Effect Size - Too easy to manipulate data?

    Hello everyone, I have several statistics textbook at home and consulted multiple online sources but have not found an answer to this. First -...

    Started by vasso‎, 07-06-2015 08:46 AM
    • Replies: 8
    • Views: 569
    07-10-2015, 04:23 PM Go to last post
  39. 5 Factor Personality Traits and Employee Engagement

    Hello, I have just graduated, interning at a company and have been asked to find out what type of personalities we have here, and the relationship it...

    Started by thedonone‎, 07-07-2015 10:20 AM
    • Replies: 0
    • Views: 204
    07-07-2015, 10:20 AM Go to last post
  40. differences between different levels of ordinal variables (repeated measures)

    Hi all, I'm writing my thesis at the moment and I've come across a problem that I'm not sure how to solve. Maybe i'm just too focussed on it to...

    Started by nickdrenth1‎, 07-03-2015 06:37 AM
    • Replies: 1
    • Views: 231
    07-03-2015, 08:57 AM Go to last post
  41. imputation on ordinal varibales (likert scale) missing values

    We have some survey data, and some questions were left answered. When I tried to do multiple imputation, I got the message: The imputation model...

    Started by fengyuwuzu‎, 07-01-2015 09:59 AM
    • Replies: 3
    • Views: 325
    07-02-2015, 10:16 AM Go to last post
  42. Big Data

    In a surveillance society, are there now computer-aided methods way more sophisticated than Factor Analysis such that no piece of info about any...

    Started by Outlier‎, 06-14-2015 01:47 PM
    • Replies: 10
    • Views: 672
    07-01-2015, 12:12 PM Go to last post
  43. normality problem

    I have 15 dependent variables on on IQ measure am using in my study but after checking for skewness and kurtosis two of them are not normally...

    Started by miezahdaniel‎, 06-29-2015 05:16 PM
    issue., normality
    • Replies: 3
    • Views: 286
    06-29-2015, 06:32 PM Go to last post
  44. comparing two independent binomial data sets, unequal size, Welchs t-test?

    I would like to compare the pass rates of two different classes (say English 111 and English 113). The data is binomial (0= fail, 1=pass). The sets...

    Started by thankyou‎, 06-27-2015 07:59 PM
    binomial data, educational measurement, welch's t-test
    • Replies: 3
    • Views: 342
    06-29-2015, 10:02 AM Go to last post
  45. HELP! 4x2 Mixed Design ANOVA Post Hoc Tests

    Hi all, I'm a PhD student and for my most recent study I conducted a 4 (experimental condition) x 2 (emotion type) mixed design ANOVA with...

    Started by nerdlynoel‎, 06-29-2015 09:19 AM
    anova, mixed design, post hoc tests, reporting results
    • Replies: 0
    • Views: 149
    06-29-2015, 09:19 AM Go to last post
  46. dependence of measures

    What to do with lack of independence in measures? What would you do if there's a correlation among measures? I am comparing a group of 20...

    Started by Mriazi‎, 06-27-2015 04:36 PM
    • Replies: 1
    • Views: 187
    06-28-2015, 02:28 AM Go to last post
  47. grouping participants together to form 1 group

    Hi sorry for the silly question:shakehead but I need some help I have 3 groups of participants in groups A, B and C but due to the small population...

    Started by cindz‎, 06-27-2015 11:04 AM
    • Replies: 0
    • Views: 160
    06-27-2015, 11:04 AM Go to last post
  48. SEM modelers and R users: lavaan, sem or OpenMX?

    hey out there to all SEM and R users... just wanted to conduct a quick, informal poll about which R package do people consider is the best suited to...

    Started by spunky‎, 01-23-2012 04:38 PM
    • Replies: 10
    • Views: 5,817
    06-26-2015, 09:08 AM Go to last post
  49. Relationship between 2 measures - simple correlation or which test?

    Hi, I would like to know if 2 measures are related or not across development - this is my question. I have 8 developmental age groups (from 5...

    Started by doro‎, 06-26-2015 06:45 AM
    • Replies: 0
    • Views: 174
    06-26-2015, 06:45 AM Go to last post
  50. Please help analysis between Nominal and interval Value in Excel

    I first want to say that this is my first post so sorry if I put it in the wrong topic, second English isn't my mother tongue so sorry as well for...

    Started by mausie94‎, 06-24-2015 06:11 PM
    • Replies: 1
    • Views: 294
    06-25-2015, 04:35 PM Go to last post
  51. Factor Analysis Repeated Measure ANOVA Between Subjects

    I conducted an experiment with 199 participants with each exposed to 36 different image and sound combinations (12 images x 4 sounds). They rated...

    Started by markas101‎, 06-24-2015 10:46 AM
    • Replies: 0
    • Views: 162
    06-24-2015, 10:46 AM Go to last post
  52. Cool Factor analysis with Likert-scale justifiable or not in this situation?

    Hello my name is Ramon, and I'm new to the forum, I'm currently finishing my master's thesis, and have a question about one of my analyses. ...

    Started by Ramon‎, 06-24-2015 03:14 AM
    • Replies: 1
    • Views: 218
    06-24-2015, 05:48 AM Go to last post
  53. The effects of transforming skewed data

    Hi There, I would like to know more about transforming data. I know that for parametric statistics data needs to be normally distributed, but I am...

    Started by Zenstone55‎, 06-22-2015 04:23 AM
    kurtosis, normal distribution, skew, transformation
    • Replies: 3
    • Views: 308
    06-22-2015, 09:42 AM Go to last post
  54. repeated measure ancova

    Hi, I do have a rather simple question but could not find a direct answer on other forums. I ran a repeated measures ancova with time (2) as...

    Started by sinaSW‎, 06-20-2015 12:16 AM
    ancova, covariate, repeated-measures
    • Replies: 3
    • Views: 362
    06-20-2015, 05:25 PM Go to last post
  55. Help with botched thesis data and analysis design

    Hi, I need help making sense of what I can do to analyze the data I have for my thesis. I was conducting a mixed methods study within a school to...

    Started by obiwankenobi‎, 06-16-2015 05:09 PM
    • Replies: 2
    • Views: 278
    06-19-2015, 09:37 PM Go to last post
  56. Advice appreciated

    I am looking at conducting some initial exploratory research and I am considering which tests to use for analyses of the quantitative data - but I am...

    Started by liampatrick‎, 06-04-2015 08:11 AM
    • Replies: 1
    • Views: 299
    06-19-2015, 09:09 PM Go to last post
  57. difference between item parceling and factor analysis?

    I seldom see people use item parceling but heard a lot of factor analysis. what is purpose of item parceling?

    Started by fengyuwuzu‎, 06-18-2015 09:04 AM
    • Replies: 0
    • Views: 146
    06-18-2015, 09:04 AM Go to last post
  58. Dividing a variable in three groups, what method to use?

    Hi all, For my research, I had all my respondents fill in a quiz and I calculated their scores (ranging from 0 to 10). I want to divide the whole...

    Started by Johan12345‎, 06-17-2015 09:13 AM
    • Replies: 0
    • Views: 151
    06-17-2015, 09:13 AM Go to last post
  59. Bonferroni Adjustment and Assumptions

    Hello, I'd just like to get clarification on something. When you perform a bonferroni adjustment (dividing the alpha level by the amount of tests...

    Started by Jake-Finn‎, 06-09-2015 02:30 PM
    • Replies: 3
    • Views: 441
    06-15-2015, 08:22 AM Go to last post
  60. Model-based cluster analysis in spss?

    Greetings everyone. I recently conducted a study on attitude towards pain and psychopathy. I gathered the data of 609 participants on the PPI-SF...

    Started by durand4‎, 06-11-2015 12:47 PM
    • Replies: 0
    • Views: 235
    06-11-2015, 12:47 PM Go to last post

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