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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: 30,787
    11-10-2005, 12:21 AM Go to last post
  1. 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: 996
    06-03-2015, 11:35 AM Go to last post
  2. 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: 990
    06-03-2015, 05:35 AM Go to last post
  3. 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: 773
    06-03-2015, 03:46 AM Go to last post
  4. 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: 1,311
    06-02-2015, 09:57 PM Go to last post
  5. 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: 11,353
    06-01-2015, 05:45 PM Go to last post
  6. 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: 1,380
    06-01-2015, 12:57 AM Go to last post
  7. 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: 2,342
    05-30-2015, 05:50 PM Go to last post
  8. 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: 1,128
    05-28-2015, 07:50 AM Go to last post
  9. 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: 754
    05-28-2015, 06:25 AM Go to last post
  10. 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: 1,234
    05-26-2015, 06:12 AM Go to last post
  11. 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: 2,292
    05-26-2015, 06:01 AM Go to last post
  12. 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: 1,931
    05-25-2015, 03:43 PM Go to last post
  13. 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: 4,606
    05-25-2015, 12:23 PM Go to last post
  14. 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: 1,291
    05-24-2015, 06:35 PM Go to last post
  15. 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: 913
    05-20-2015, 12:36 PM Go to last post
  16. 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: 1,456
    05-19-2015, 11:27 PM Go to last post
  17. 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: 901
    05-18-2015, 12:26 PM Go to last post
  18. 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: 879
    05-18-2015, 09:28 AM Go to last post
  19. 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: 1,856
    05-15-2015, 12:37 PM Go to last post
  20. 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: 1,259
    05-14-2015, 05:04 PM Go to last post
  21. 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: 1,971
    05-11-2015, 03:51 AM Go to last post
  22. 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: 7,087
    05-08-2015, 03:19 PM Go to last post
  23. 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: 1,420
    05-05-2015, 06:36 AM Go to last post
  24. 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: 3,143
    04-27-2015, 09:19 AM Go to last post
  25. 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: 59,962
    04-26-2015, 08:05 PM Go to last post
  26. 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: 2,003
    04-25-2015, 03:09 PM Go to last post
  27. 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: 809
    04-24-2015, 09:43 AM Go to last post
  28. 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: 1,630
    04-23-2015, 11:53 PM Go to last post
  29. 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: 1,168
    04-22-2015, 03:35 PM Go to last post
  30. 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: 1,224
    04-21-2015, 07:46 AM Go to last post
  31. 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: 917
    04-20-2015, 05:00 AM Go to last post
  32. 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: 1,902
    04-17-2015, 08:19 PM Go to last post
  33. 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: 2,408
    04-15-2015, 06:43 AM Go to last post
  34. 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 02:34 PM
    • Replies: 7
    • Views: 1,964
    04-14-2015, 07:29 AM Go to last post
  35. 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 04:49 AM
    • Replies: 0
    • Views: 929
    04-14-2015, 04:49 AM Go to last post
  36. 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 11:08 AM
    ancova, anova, planned comparison, psychology, spss
    • Replies: 2
    • Views: 1,331
    04-14-2015, 02:25 AM Go to last post
  37. 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 05:56 AM
    • Replies: 2
    • Views: 1,013
    04-10-2015, 07:45 AM Go to last post
  38. How can I examine whether two lists are significantly different?

    deleted post

    Started by coffeee‎, 04-09-2015 07:26 AM
    • Replies: 0
    • Views: 974
    04-09-2015, 07:26 AM Go to last post
  39. 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 10:46 PM
    • Replies: 5
    • Views: 1,410
    04-08-2015, 11:58 PM Go to last post
  40. 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 02:36 PM
    3-way interaction, mixed design, spss output
    • Replies: 0
    • Views: 1,715
    04-08-2015, 02:36 PM Go to last post
  41. 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 02:18 PM
    • Replies: 0
    • Views: 805
    04-08-2015, 02:18 PM Go to last post
  42. 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 I’ll try to make...

    Started by hasargen‎, 04-07-2015 07:02 AM
    • Replies: 0
    • Views: 1,288
    04-07-2015, 07:02 AM Go to last post
  43. 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 01:54 PM
    anova, factorial design, psychology
    • Replies: 0
    • Views: 1,259
    04-06-2015, 01:54 PM Go to last post
  44. 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 11:53 AM
    design of experiments, experimental design, methodology, psychology, psychology statistics
    • Replies: 1
    • Views: 945
    04-06-2015, 02:12 AM Go to last post
  45. 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 10:04 AM
    • Replies: 3
    • Views: 2,289
    04-05-2015, 08:13 AM Go to last post
  46. 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 06:30 AM
    • Replies: 1
    • Views: 1,165
    04-05-2015, 03:15 AM Go to last post
  47. Dissertation Results Comparisons - which SPSS method should I use?

    Hi everyone, I'm in my final year as a Psychology student aspiring to be a cognitive neuroscientist (accepted to birmingham university provided I...

    Started by Statisticsnewby‎, 04-03-2015 01:36 PM
    • Replies: 2
    • Views: 1,296
    04-04-2015, 06:08 AM Go to last post
  48. which data to use

    Hi I collected pre-intervention quantitative data via a questionnaire from 70 children 2 years ago. I then went to do the post intervention data...

    Started by RAYDO‎, 04-03-2015 03:51 PM
    • Replies: 0
    • Views: 842
    04-03-2015, 03:51 PM Go to last post
  49. Chi Squared test of proportions

    Hi there, I am currently coming towards the end of my dissertation, and I am looking for a bit of help with how to test distributions using a chi...

    Started by tomkilbey29‎, 03-31-2015 11:24 AM
    • Replies: 0
    • Views: 1,015
    03-31-2015, 11:24 AM Go to last post
  50. Post Pearsons correlation, confidence intervals, bootstrapping... Statistical nightmare

    I am currently running a project where I have 4 variables and a questionannaire with 4 subscales. I have performed a Pearsons correlation on this...

    Started by DK-IV‎, 03-31-2015 09:55 AM
    bootstrapping, confidence intervals, pearsons correlation
    • Replies: 0
    • Views: 745
    03-31-2015, 09:55 AM Go to last post
  51. Question Workshop evaluation with control group and pre/post/follow-up questionnaire

    Hello, Thanks for taking the time to read this rather long message. It will become clear that I have a terrible grasp of data analysis and need...

    Started by Beano‎, 03-23-2015 11:07 AM
    ancova, questionnaire
    • Replies: 9
    • Views: 2,811
    03-30-2015, 09:19 AM Go to last post
  52. One-Way Anova - Combining three variables into one variable with three levels.

    Hello, I have one independent variable with three levels: Sexual Prime Condition, Male Prime and Control Prime. I aim to conduct a one-way Anova...

    Started by RhiannonPidgeon‎, 03-30-2015 07:23 AM
    • Replies: 0
    • Views: 941
    03-30-2015, 07:23 AM Go to last post
  53. Question Buss-Perry syntax

    Hi guys, need help for a project research. I need to compare and analyze agressivness levels using Buss-Perry Aggresion Questionnaire, but I get lost...

    Started by statbeginner‎, 03-26-2015 03:40 PM
    • Replies: 0
    • Views: 1,049
    03-26-2015, 03:40 PM Go to last post
  54. What analysis for two independent groups with one additional dependent group?

    Hi all We had people record responses while assigned to 2 different conditions (A and B). We then divided the responses from participants in B...

    Started by Søren‎, 03-25-2015 08:21 AM
    • Replies: 8
    • Views: 1,887
    03-26-2015, 06:24 AM Go to last post
  55. No interaction but significant planned comparisons - how to interpret?

    Hi, I'm reading an article in which the authors describe how they weren't able to find an interaction between A and B, but that in planned...

    Started by replica‎, 12-02-2014 06:45 AM
    • Replies: 3
    • Views: 1,276
    03-25-2015, 01:26 PM Go to last post
  56. Non-parametric three-way ANOVA?

    Hi everyone, I and some of my classmates need to include a data analysis strategy in a research proposal assignment and could really use some help...

    Started by Katbooey‎, 03-23-2015 05:16 PM
    anova, spss
    • Replies: 3
    • Views: 3,251
    03-24-2015, 03:48 AM Go to last post
  57. How to examine relationship between independent, dependent and explanatory variables?

    Hello, I am doing a study looking at the effects of positive thinking (PT) and exercise on depression. I'll be measuring at LEAST 2 outcomes. So...

    Started by Jake-Finn‎, 03-19-2015 06:12 PM
    • Replies: 4
    • Views: 1,626
    03-22-2015, 07:35 PM Go to last post
  58. Boston Naming Test

    Dear Friends, I am trying to define the differences of two means in Boston Naming Test (BNT). I want to conduct a multipl regression with...

    Started by rezzak‎, 03-22-2015 03:47 AM
    bootstraping, boston naming test, regression
    • Replies: 0
    • Views: 2,066
    03-22-2015, 03:47 AM Go to last post
  59. Smile Need help: reg EQS and Goodness of Fit tests

    Hi! Hope you guys could help me out here... I'm doing a path analysis on EQS, and the goodness of fit test results i got are the ff - i'm not sure if...

    Started by lissa89‎, 03-16-2015 04:17 AM
    cfi, eqs, goodness-of-fit, rmsea
    • Replies: 7
    • Views: 1,708
    03-17-2015, 12:39 PM Go to last post
  60. Comparing two groups in the Theory of Planned Behavior

    Greetings all: I am trying to determine the best method to compare two groups (gender in this case) means/factor loadings on the Theory of Planned...

    Started by Nole‎, 03-11-2015 05:11 PM
    • Replies: 1
    • Views: 2,962
    03-16-2015, 07:48 PM Go to last post

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