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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: 15,171
    11-09-2005, 11:21 PM Go to last post
  1. 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, Today 08:46 AM
    • Replies: 1
    • Views: 77
    Today, 12:13 PM Go to last post
  2. 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: 121
    07-03-2015, 08:57 AM Go to last post
  3. 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: 164
    07-02-2015, 10:16 AM Go to last post
  4. 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: 509
    07-01-2015, 12:12 PM Go to last post
  5. 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: 157
    06-29-2015, 06:32 PM Go to last post
  6. 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: 192
    06-29-2015, 10:02 AM Go to last post
  7. 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: 73
    06-29-2015, 09:19 AM Go to last post
  8. 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: 117
    06-28-2015, 02:28 AM Go to last post
  9. 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: 81
    06-27-2015, 11:04 AM Go to last post
  10. 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: 5,329
    06-26-2015, 09:08 AM Go to last post
  11. 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: 78
    06-26-2015, 06:45 AM Go to last post
  12. 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: 206
    06-25-2015, 04:35 PM Go to last post
  13. 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: 105
    06-24-2015, 10:46 AM Go to last post
  14. 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: 146
    06-24-2015, 05:48 AM Go to last post
  15. 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: 201
    06-22-2015, 09:42 AM Go to last post
  16. 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: 4
    • Views: 240
    06-20-2015, 05:25 PM Go to last post
  17. 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: 214
    06-19-2015, 09:37 PM Go to last post
  18. 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: 222
    06-19-2015, 09:09 PM Go to last post
  19. 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: 79
    06-18-2015, 09:04 AM Go to last post
  20. 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: 77
    06-17-2015, 09:13 AM Go to last post
  21. 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: 367
    06-15-2015, 08:22 AM Go to last post
  22. 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: 147
    06-11-2015, 12:47 PM Go to last post
  23. 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: 4
    • Views: 267
    06-09-2015, 12:16 PM Go to last post
  24. Smile Test for predictions/likelihood

    Hi All! I have two vaiables: 1) Collision with a lead vehicle (Yes/No) and 2) Reaction Time (Scale). I'd like to know whether, in SPSS, there is a...

    Started by tyronlouw‎, 06-05-2015 07:12 AM
    • Replies: 1
    • Views: 278
    06-05-2015, 01:23 PM Go to last post
  25. Relative measure in a questionnaire

    Hello everyone, I have a psychological questionnaire which deals with people's satisfaction from life. The questionnaire is build from several...

    Started by Yankel‎, 06-03-2015 10:43 PM
    • Replies: 0
    • Views: 141
    06-03-2015, 10:43 PM Go to last post
  26. Reliability between sets - is the intraclass correlation coefficient appropriate?

    Hi, I am having trouble applying the ICC to data I have collected for my Masters thesis. I have collected 8 sets (of 30 samples) from 40+...

    Started by Dubzy‎, 05-25-2015 03:24 PM
    agreement, icc, intraclass correlation, reliability
    • Replies: 1
    • Views: 201
    06-03-2015, 11:35 AM Go to last post
  27. Red face Test for association: Categorical data vs Continuous data

    Hi! I am trying to understand whether and what statistical test I can carry out in SPSS to see if there is an association between two independent...

    Started by tyronlouw‎, 06-03-2015 05:24 AM
    • Replies: 2
    • Views: 160
    06-03-2015, 05:35 AM Go to last post
  28. Replication: Strange flip of signs in regression

    Dear all, I have successfully run an experiment 2 times. I predicted an interaction between a dummy variable (intervention 1-yes/0-no) and a...

    Started by RBOON‎, 06-03-2015 03:46 AM
    ancova, flip, regression, signs
    • Replies: 0
    • Views: 92
    06-03-2015, 03:46 AM Go to last post
  29. Help with test selection for study

    Hi everyone, I'm looking for some help around the appropriate test selection, since I am collecting my own data. Here is some background: 1....

    Started by thedeepsays‎, 05-28-2015 01:07 PM
    • Replies: 2
    • Views: 282
    06-02-2015, 09:57 PM Go to last post
  30. how to do a contrast analysis for an interaction between two within subjects effects?

    Hello! I have a quite simple data pattern but find it hard to test a specific contrast I expected. I have 2 within subjects factors, each with two...

    Started by marie‎, 01-10-2012 03:40 PM
    2 Pages
    1 2
    contrast analysis, interaction, manova, repeated measures anova
    • Replies: 27
    • Views: 6,135
    06-01-2015, 05:45 PM Go to last post
  31. Regression analysis to compare groups

    I recently submitted a paper in which I split scores on a psychometric variable at the mean to produce high and low score groups and then used...

    Started by swavv‎, 05-31-2015 10:54 PM
    • Replies: 1
    • Views: 181
    06-01-2015, 12:57 AM Go to last post
  32. Preliminary data analysis for Logistic regression - Help please!!!

    Hi everyone, I am stuck at the preliminary analysis of my data and I need your ideas and help please. Here a small overview of my study: 1....

    Started by Piamialia‎, 05-30-2015 05:50 PM
    • Replies: 0
    • Views: 190
    05-30-2015, 05:50 PM Go to last post
  33. Testing for Attrition Bias, within/between? Type 1 Error, Bonferroni Adjustment

    Hello, My study consists of one IV (group treatment). A main treatment, and a control treatment, and four DVs (mental health measures,...

    Started by Jake-Finn‎, 05-28-2015 05:45 AM
    • Replies: 2
    • Views: 136
    05-28-2015, 07:50 AM Go to last post
  34. Help required for service evaluation project - t-tests v correlation and multiple reg

    Good morning, I am running a service evaluation project looking at two outcome measures. I have attached a 2 page document which explains the...

    Started by jessbuttery‎, 05-28-2015 04:45 AM
    • Replies: 1
    • Views: 151
    05-28-2015, 06:25 AM Go to last post
  35. Help with our data analysis (which one?!)

    Hey folks, hope this is the right place... Ok, so we aren't completely sure if we have the right data analysis type, so it would be awesome if you...

    Started by princessconsuela‎, 05-25-2015 10:29 PM
    • Replies: 2
    • Views: 267
    05-26-2015, 06:12 AM Go to last post
  36. mean+/-2.5 sd to remove outliers

    Hi everybody. I'm looking for a smart answer to this question: "Provide a justification of using 2.5 standard deviation (and not 3 o 2) for...

    Started by Tan‎, 05-24-2015 01:24 PM
    • Replies: 1
    • Views: 218
    05-26-2015, 06:01 AM Go to last post
  37. Homogeneity Of Variances assumption in ANOVA use Levene's AND Box's test?

    Hello, I am carrying out a Mixed between-within subjects analysis of variance, following Pallant's (2011) instructions. The chapter I am...

    Started by Jake-Finn‎, 05-23-2015 12:23 PM
    • Replies: 2
    • Views: 290
    05-25-2015, 03:43 PM Go to last post
  38. Bonferroni Adjustment/Correction and Confidence Intervals

    Hello, I have two questions here. RESOLVED (for now): You perform the bonferroni for multiple tests and/or multiple comparisons. FIRST: I...

    Started by Jake-Finn‎, 05-14-2015 09:39 AM
    bonferroni
    • Replies: 13
    • Views: 503
    05-25-2015, 12:23 PM Go to last post
  39. Query on sample sizes and cases in each cell

    Hello, Very simply, I am unsure what a cell means in this context, and would like a clarification. So, I have conducted a study. Before I did...

    Started by Jake-Finn‎, 04-30-2015 06:57 AM
    • Replies: 4
    • Views: 413
    05-24-2015, 06:35 PM Go to last post
  40. Difficult Ranking/Regression Problem

    Hello. I am trying to work out how well a number of independent variables predict the probability of being perceived to be good at a certain task. ...

    Started by proboscus‎, 05-20-2015 12:36 PM
    • Replies: 0
    • Views: 201
    05-20-2015, 12:36 PM Go to last post
  41. HLM- daily diary data for lagged analyses, controlling for DV at t-1?

    Hi all, I have a dataset that consists of daily observations (21 days) of people's daily general mood and daily life satisfaction. I am interested...

    Started by Marissa4USA‎, 05-19-2015 04:51 PM
    • Replies: 2
    • Views: 241
    05-19-2015, 11:27 PM Go to last post
  42. really dumb/basic question about repeated-measures design

    Let's say I did a repeated-measures experiment with 2 conditions and I counterbalanced. If my data were in SPSS, what would be the easiest/usual way...

    Started by bruin‎, 05-18-2015 12:26 PM
    • Replies: 0
    • Views: 180
    05-18-2015, 12:26 PM Go to last post
  43. reporting mixed anova and bonferroni

    I need help with reporting factorial mixed ANOVA's for a research report that I've been tasked with and have been given no information for reporting...

    Started by akindrat18‎, 05-18-2015 09:28 AM
    • Replies: 0
    • Views: 159
    05-18-2015, 09:28 AM Go to last post
  44. No post-hoc tests for Mixed between-within subjects ANOVA aka split-plot ANOVA ?

    Hello, I am performing some "mixed between-within subjects ANOVAs" aka "split-plot ANOVAs" aka "SPANOVAs". I am following Pallant 2011. ...

    Started by Jake-Finn‎, 05-14-2015 02:45 PM
    • Replies: 4
    • Views: 221
    05-15-2015, 12:37 PM Go to last post
  45. Paired/Matched Sample Question

    Hello Everyone, I would greatly appreciate some help with this question. I am trying to help a good friend with her dissertation and am now...

    Started by psycgirl‎, 05-14-2015 05:04 PM
    • Replies: 0
    • Views: 134
    05-14-2015, 05:04 PM Go to last post
  46. SEM with categorical variable/parceling/how to enter in AMOS?

    I need to do an SEM and I'm stumped about what to do with one of my variables, which is a nominal categorical variable (previous experience in x vs....

    Started by buntington‎, 04-14-2014 02:56 PM
    3 Pages
    1 2 3
    sem
    • Replies: 31
    • Views: 3,888
    05-14-2015, 04:21 AM Go to last post
  47. Exclamation Help on stats for research model needed

    I am in need of a quick statistical advice for a study I planned, and I hope you can help me a bit with it. I'd really appreciate your expertise. The...

    Started by yasho1984‎, 04-24-2015 05:15 AM
    • Replies: 6
    • Views: 481
    05-11-2015, 03:51 AM Go to last post
  48. Question z scores to percentiles

    Question 5 Identify the case with the lowest z score. Refer to Appendix A in the Warner (2013) text. Interpret the percentile rank of this z score...

    Started by amhcmh‎, 05-01-2014 06:05 PM
    • Replies: 3
    • Views: 1,098
    05-08-2015, 03:19 PM Go to last post
  49. Different number of cases for each participant - correlate with background data?

    I'm new to statistics so sorry about my lack of knowledge, but hey that's why I'm here! I have a long data set containing cases of survey...

    Started by King Ding‎, 05-05-2015 02:26 AM
    • Replies: 4
    • Views: 273
    05-05-2015, 06:36 AM Go to last post
  50. Meaningful Variables

    Some background: I am an early childhood educator taking my very first statistics course. We are in week three and I am already lost. We are...

    Started by amhcmh‎, 04-26-2014 11:12 AM
    • Replies: 4
    • Views: 2,848
    05-03-2015, 03:42 PM Go to last post
  51. Repeated measures ANOVA; missing data and multiple measures at each time point

    Hi TalkStats I have data from a project. The data is the blood pressure for each participant at day of "baseline" visit, and 3 time points after...

    Started by lb5962‎, 04-27-2015 05:27 AM
    anova, medical statistics, missing data, repeated measures anova
    • Replies: 2
    • Views: 219
    04-27-2015, 09:19 AM Go to last post
  52. ANOVA post-hoc tests: Bonferroni, LSD, or Tukey?

    Hi guys, Not knowing much on the differences between the above tests, which would you recommend for my ANOVA post hoc tests? I was using...

    Started by Lolly‎, 08-16-2013 07:27 AM
    • Replies: 9
    • Views: 25,093
    04-26-2015, 08:05 PM Go to last post
  53. Validating a scale

    Hello! I am trying to provide statistical support for the validity and reliability of a scale. There is only one construct being sought (student...

    Started by shandar7‎, 04-25-2015 03:09 PM
    • Replies: 0
    • Views: 173
    04-25-2015, 03:09 PM Go to last post
  54. IV problem of MANOVA

    Hi everybody, How can we know how many IVs can we put in MANOVA? I have 1 DV with 3 groups, and as IV, the neuropsychological test (CERAD)...

    Started by rezzak‎, 04-24-2015 09:43 AM
    manova
    • Replies: 0
    • Views: 195
    04-24-2015, 09:43 AM Go to last post
  55. Bi-Factor CFA in LISREL help needed

    Hi, I'm attempting to run a bi-factor CFA with LISREL 9.1. I have 26 ordinal items with one general factor (e.g., total score for the scale)...

    Started by Ancole‎, 04-23-2015 01:35 PM
    • Replies: 1
    • Views: 224
    04-23-2015, 11:53 PM Go to last post
  56. Longitude data help needed

    I have collected data at Time 1 and Time 2. The data consists of three questionaires, 1 --> DV= as numeral score on a scale of 1 to 6 or frequency...

    Started by Xbar‎, 04-20-2015 10:45 AM
    • Replies: 4
    • Views: 339
    04-22-2015, 03:35 PM Go to last post
  57. Which test should I run?

    Hello everyone, my data were collected from different groups of participants. More specifically, my study had a baseline and several experimental...

    Started by julia1985‎, 04-21-2015 03:46 AM
    • Replies: 3
    • Views: 325
    04-21-2015, 07:46 AM Go to last post
  58. puzzling results when contrasting conditions in 3 x 2 design

    Hi everyone, I'm encountering something puzzling when analyzing my data. My data consists out of 2 independent variables and one dependent...

    Started by KoenStat‎, 04-20-2015 05:00 AM
    3 x 2 design, contrast analysis, spss
    • Replies: 0
    • Views: 185
    04-20-2015, 05:00 AM Go to last post
  59. Post Research in sound symbolism (Simple request, serious help demanded)

    Hello everyone, I'm glad that I found this forum. I'm actually a student in Sciences of Language. I have an M.A thesis on Sound Symbolism. It's a...

    Started by Theram‎, 04-16-2015 06:25 PM
    • Replies: 2
    • Views: 412
    04-17-2015, 08:19 PM Go to last post
  60. Single subject Kruskal Wallis Test

    Hello, I posted a while ago about a statistics conundrum I was having. I think I may have solved it but I wanted to check with some statistics...

    Started by clareish‎, 04-14-2015 12:36 PM
    • Replies: 3
    • Views: 403
    04-15-2015, 06:43 AM Go to last post

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