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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: 21,823
    11-10-2005, 12:21 AM Go to last post
  1. 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 07:45 AM
    • Replies: 0
    • Views: 417
    06-26-2015, 07:45 AM Go to last post
  2. 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 07:11 PM
    • Replies: 1
    • Views: 506
    06-25-2015, 05:35 PM Go to last post
  3. 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 11:46 AM
    • Replies: 0
    • Views: 402
    06-24-2015, 11:46 AM Go to last post
  4. 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 04:14 AM
    • Replies: 1
    • Views: 461
    06-24-2015, 06:48 AM Go to last post
  5. 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 05:23 AM
    kurtosis, normal distribution, skew, transformation
    • Replies: 3
    • Views: 533
    06-22-2015, 10:42 AM Go to last post
  6. 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 01:16 AM
    ancova, covariate, repeated-measures
    • Replies: 3
    • Views: 795
    06-20-2015, 06:25 PM Go to last post
  7. 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 06:09 PM
    • Replies: 2
    • Views: 460
    06-19-2015, 10:37 PM Go to last post
  8. 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 09:11 AM
    • Replies: 1
    • Views: 473
    06-19-2015, 10:09 PM Go to last post
  9. 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 10:04 AM
    • Replies: 0
    • Views: 393
    06-18-2015, 10:04 AM Go to last post
  10. 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 10:13 AM
    • Replies: 0
    • Views: 311
    06-17-2015, 10:13 AM Go to last post
  11. 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 03:30 PM
    • Replies: 3
    • Views: 783
    06-15-2015, 09:22 AM Go to last post
  12. 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 01:47 PM
    • Replies: 0
    • Views: 541
    06-11-2015, 01:47 PM Go to last post
  13. 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 08:12 AM
    • Replies: 1
    • Views: 598
    06-05-2015, 02:23 PM Go to last post
  14. 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 11:43 PM
    • Replies: 0
    • Views: 397
    06-03-2015, 11:43 PM Go to last post
  15. 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 04:24 PM
    agreement, icc, intraclass correlation, reliability
    • Replies: 1
    • Views: 460
    06-03-2015, 12:35 PM Go to last post
  16. 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 06:24 AM
    • Replies: 2
    • Views: 450
    06-03-2015, 06:35 AM Go to last post
  17. 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 04:46 AM
    ancova, flip, regression, signs
    • Replies: 0
    • Views: 307
    06-03-2015, 04:46 AM Go to last post
  18. 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 02:07 PM
    • Replies: 2
    • Views: 668
    06-02-2015, 10:57 PM Go to last post
  19. 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 04:40 PM
    2 Pages
    1 2
    contrast analysis, interaction, manova, repeated measures anova
    • Replies: 27
    • Views: 8,434
    06-01-2015, 06:45 PM Go to last post
  20. 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 11:54 PM
    • Replies: 1
    • Views: 524
    06-01-2015, 01:57 AM Go to last post
  21. 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 06:50 PM
    • Replies: 0
    • Views: 717
    05-30-2015, 06:50 PM Go to last post
  22. 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 06:45 AM
    • Replies: 2
    • Views: 497
    05-28-2015, 08:50 AM Go to last post
  23. 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 05:45 AM
    • Replies: 1
    • Views: 412
    05-28-2015, 07:25 AM Go to last post
  24. 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 11:29 PM
    • Replies: 2
    • Views: 563
    05-26-2015, 07:12 AM Go to last post
  25. 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 02:24 PM
    • Replies: 1
    • Views: 840
    05-26-2015, 07:01 AM Go to last post
  26. 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 01:23 PM
    • Replies: 2
    • Views: 1,066
    05-25-2015, 04:43 PM Go to last post
  27. 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 10:39 AM
    bonferroni
    • Replies: 13
    • Views: 1,826
    05-25-2015, 01:23 PM Go to last post
  28. 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 07:57 AM
    • Replies: 4
    • Views: 802
    05-24-2015, 07:35 PM Go to last post
  29. 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 01:36 PM
    • Replies: 0
    • Views: 469
    05-20-2015, 01:36 PM Go to last post
  30. 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 05:51 PM
    • Replies: 2
    • Views: 741
    05-20-2015, 12:27 AM Go to last post
  31. 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 01:26 PM
    • Replies: 0
    • Views: 389
    05-18-2015, 01:26 PM Go to last post
  32. 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 10:28 AM
    • Replies: 0
    • Views: 417
    05-18-2015, 10:28 AM Go to last post
  33. 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 03:45 PM
    • Replies: 4
    • Views: 591
    05-15-2015, 01:37 PM Go to last post
  34. 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 06:04 PM
    • Replies: 0
    • Views: 365
    05-14-2015, 06:04 PM Go to last post
  35. 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 06:15 AM
    • Replies: 6
    • Views: 940
    05-11-2015, 04:51 AM Go to last post
  36. 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 07:05 PM
    • Replies: 3
    • Views: 2,692
    05-08-2015, 04:19 PM Go to last post
  37. 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 03:26 AM
    • Replies: 4
    • Views: 521
    05-05-2015, 07:36 AM Go to last post
  38. 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 06:27 AM
    anova, medical statistics, missing data, repeated measures anova
    • Replies: 2
    • Views: 788
    04-27-2015, 10:19 AM Go to last post
  39. 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 08:27 AM
    • Replies: 9
    • Views: 45,143
    04-26-2015, 09:05 PM Go to last post
  40. 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 04:09 PM
    • Replies: 0
    • Views: 398
    04-25-2015, 04:09 PM Go to last post
  41. 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 10:43 AM
    manova
    • Replies: 0
    • Views: 395
    04-24-2015, 10:43 AM Go to last post
  42. 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 02:35 PM
    • Replies: 1
    • Views: 695
    04-24-2015, 12:53 AM Go to last post
  43. 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 11:45 AM
    • Replies: 4
    • Views: 604
    04-22-2015, 04:35 PM Go to last post
  44. 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 04:46 AM
    • Replies: 3
    • Views: 650
    04-21-2015, 08:46 AM Go to last post
  45. 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 06:00 AM
    3 x 2 design, contrast analysis, spss
    • Replies: 0
    • Views: 367
    04-20-2015, 06:00 AM Go to last post
  46. 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 07:25 PM
    • Replies: 2
    • Views: 1,013
    04-17-2015, 09:19 PM Go to last post
  47. 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 01:36 PM
    • Replies: 3
    • Views: 801
    04-15-2015, 07:43 AM Go to last post
  48. Help with use of Transformed variables in regression analysis

    Hello Everyone, My DV and 2 IVs were negatively skewed so I Transformed the data using log transformation. Now, I performed regression analysis...

    Started by Arooba‎, 04-13-2015 03:34 PM
    • Replies: 7
    • Views: 987
    04-14-2015, 08:29 AM Go to last post
  49. Standard deviation conversion

    For my masters thesis I am conducting a meta-analysis looking at the differences in CHC abilities within Autism Spectrum Disorders. I have gathered...

    Started by slgur81‎, 04-14-2015 05:49 AM
    • Replies: 0
    • Views: 448
    04-14-2015, 05:49 AM Go to last post
  50. HELP - One-way ANOVAs/planned comparisons/correlation

    Hi all, I'm currently running a Psychology experiment: the effect of background music on memory and mood. I will be using SPSS to conduct two...

    Started by jwren‎, 04-12-2015 12:08 PM
    ancova, anova, planned comparison, psychology, spss
    • Replies: 2
    • Views: 547
    04-14-2015, 03:25 AM Go to last post
  51. interaction nonlinear mediation?

    Hi, For my research, I would like to test whether a nonlinear continuous variable mediates the effect between a withinsubjects factor (3 levels) x...

    Started by Miilouh‎, 04-10-2015 06:56 AM
    • Replies: 2
    • Views: 571
    04-10-2015, 08:45 AM Go to last post
  52. How can I examine whether two lists are significantly different?

    deleted post

    Started by coffeee‎, 04-09-2015 08:26 AM
    • Replies: 0
    • Views: 449
    04-09-2015, 08:26 AM Go to last post
  53. Longitudinal data: analyzing score changes from baseline between 2 groups

    Hi all, figured I'd post this in here because there may be more experience in dealing with changes in psychometric scores (e.g. BAI, PSS, MSPSS) over...

    Started by joeschmocrow‎, 04-08-2015 11:46 PM
    • Replies: 5
    • Views: 812
    04-09-2015, 12:58 AM Go to last post
  54. 3 X 2 X 2 mixed design

    Hi all, First time posting. I am having trouble 1) figuring out spss output for and 2) interpreting findings for a study I conducted with a 3...

    Started by kme‎, 04-08-2015 03:36 PM
    3-way interaction, mixed design, spss output
    • Replies: 0
    • Views: 606
    04-08-2015, 03:36 PM Go to last post
  55. Very easy question about pooled error.

    Hi, First time poster. I haven't done quantitative analysis for several years and I'm shamefully having trouble with a simple issue. I'm doing...

    Started by kansaskansas‎, 04-08-2015 03:18 PM
    • Replies: 0
    • Views: 382
    04-08-2015, 03:18 PM Go to last post
  56. Smile How to use normative data correctly for group comparisons

    This is my first time doing research at this level and I am therefore not really sure how to go about what I need help with, but Ill try to make...

    Started by hasargen‎, 04-07-2015 08:02 AM
    • Replies: 0
    • Views: 563
    04-07-2015, 08:02 AM Go to last post
  57. Is it possible to run ANOVA using Mean differences?

    I'm wondering whether it is possible, and how to run an ANOVA on mean differences rather than on means. I want to run a 2*3 ANOVA on multiple...

    Started by Jon_Gall‎, 04-06-2015 02:54 PM
    anova, factorial design, psychology
    • Replies: 0
    • Views: 691
    04-06-2015, 02:54 PM Go to last post
  58. Is this Experimental Design even possible? Help please!

    Hello all, First thank you in advance for any and all help given in response to this question. I've been searching this forum as well as other...

    Started by thechairman‎, 04-02-2015 12:53 PM
    design of experiments, experimental design, methodology, psychology, psychology statistics
    • Replies: 1
    • Views: 537
    04-06-2015, 03:12 AM Go to last post
  59. ANOVA with significant interaction, but no significance found in follow up tests

    Hi there, I'm looking for some suggestions on what to do next, or, how to verbally explain my confusing findings. I have a 2X2 between subjects...

    Started by lauramdavies‎, 04-04-2015 11:04 AM
    • Replies: 3
    • Views: 1,000
    04-05-2015, 09:13 AM Go to last post
  60. Help with the formatting of my data in SPSS

    Hi guys, For my experiment i was looking at participants reaction time and accuracy in a shape location task. Each participant engaged in 16...

    Started by Statosaurus‎, 04-04-2015 07:30 AM
    • Replies: 1
    • Views: 632
    04-05-2015, 04:15 AM Go to last post

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