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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: 11,825
    11-09-2005, 11:21 PM Go to last post
  1. Analysis for behavior change over sample treatments

    Hello all! My research examined if social behaviors in animals changed with the distribution of food treatment (clumped vs. dispersed food). My...

    Started by caddyhair‎, Yesterday 01:13 PM
    behavioural data, matrices, matrix, matrix data, social network
    • Replies: 0
    • Views: 74
    Yesterday, 01:13 PM Go to last post
  2. Minimun sample for a Mann-Whitney U test

    Hello! :wave: What is the minimun sample per group for a Mann-Whitney U test? I appreciate if you give also a reference about it Thanks!

    Started by dmon‎, 08-29-2014 06:48 PM
    mann-whitney test, sample size
    • Replies: 1
    • Views: 117
    08-30-2014, 02:12 AM Go to last post
  3. Moderation Analysis

    Hi, Got a question for moderation analysis. In Step 2 where I entered the interaction term, the R^2 change = .064, F(3, 73)=1.848, p = .146, was...

    Started by ccy‎, 08-29-2014 06:51 PM
    • Replies: 1
    • Views: 80
    08-29-2014, 07:34 PM Go to last post
  4. Basic question: linear trend effect on one-way ANOVA

    Dear experts, I have a quite basic question, when doing a one-way ANOVA (4 groups) in SPSS, if i don't find a significative effect (F test), does...

    Started by S_CALVIN‎, 08-26-2014 07:49 AM
    • Replies: 0
    • Views: 119
    08-26-2014, 07:49 AM Go to last post
  5. Question Intraclass Correlation Coefficient Types

    I have two datasets in which I probably need to use the intraclass correlation coefficient, and I want to make sure I choose the right type. ...

    Started by noober‎, 08-25-2014 07:02 PM
    data analysis, icc
    • Replies: 0
    • Views: 71
    08-25-2014, 07:02 PM Go to last post
  6. Nested vs non-nested model?

    Hi all, I am running a confirmatory factor analysis and trying to work out if my two models are nested or not - this will be important for me to...

    Started by SimonSchus‎, 08-25-2014 02:30 PM
    amos, cfa, models, nested, sem
    • Replies: 2
    • Views: 100
    08-25-2014, 03:28 PM Go to last post
  7. Random Sample Assumption Violation and Chi-Square/Reg: Ordinal and Nominal Data

    Hello Everyone, I'm a grad student in biostatistics and am currently working at my first job with real world data. I'm analyzing survey data...

    Started by doughnut1‎, 08-20-2014 01:31 PM
    assumptions, chi square?, ordinal and categorical, violation
    • Replies: 2
    • Views: 204
    08-20-2014, 05:37 PM Go to last post
  8. Steps for evaluate factorial invariance in AMOS

    Steps to evaluate factorial invariance Hi! I have to compare a model in samples of two countries, I have to run a factorial invariance analysis...

    Started by dmon‎, 08-20-2014 04:52 PM
    amos, construct validity, factorial invariance
    • Replies: 0
    • Views: 172
    08-20-2014, 04:52 PM Go to last post
  9. Categorical Moderator Regression

    Hi, I am trying to do a moderation analysis with: IV: Depressive symptoms Moderator: Condition (threat vs no threat) DV: Closeness with...

    Started by ccy‎, 08-17-2014 06:57 PM
    • Replies: 2
    • Views: 167
    08-18-2014, 08:01 PM Go to last post
  10. Inquiry about the moderated mediation, real hurry

    Hello everyone and thank you for your attention. I am now facing the problem of moderated mediation interpretation. Here is the background: ...

    Started by erikye‎, 08-18-2014 02:05 PM
    • Replies: 0
    • Views: 75
    08-18-2014, 02:05 PM Go to last post
  11. 2X2X2 design.. what statistics should I use?

    Hi, I am doing a research with a 2X2X2 design: Between subjects (Positive Mood VS Negative Mood) Within subjects (Positive Stimuli 1 VS Negative...

    Started by TiffanyReed‎, 08-18-2014 10:24 AM
    ancova, anova, research, statistics
    • Replies: 0
    • Views: 71
    08-18-2014, 10:24 AM Go to last post
  12. Which type of ANOVA to choose: split plot repeated measures or alternative?

    Hi all, I'm new to this forum but not to statistics. There's just this problem I can't get my head around, I hope someone can help me. In my...

    Started by Cis‎, 08-09-2014 05:01 PM
    • Replies: 6
    • Views: 215
    08-18-2014, 10:10 AM Go to last post
  13. Breaking-down main effect to examine demographic differences

    I showed videos of musical performances which where visually different, but the sound was identical. Participants graded both the appearance of the...

    Started by PaulC‎, 08-15-2014 08:21 PM
    interaction effects
    • Replies: 1
    • Views: 105
    08-17-2014, 06:04 PM Go to last post
  14. Estimating and using reliability metric with the same data

    Hi, I'd like to know if it is reasonable to use the same set of data to estimate and use a reliability metric from repeated measures? I am mostly...

    Started by Themistocle‎, 08-15-2014 03:17 PM
    reliability measurement
    • Replies: 0
    • Views: 108
    08-15-2014, 03:17 PM Go to last post
  15. Question about which statistical analysis to use

    I have 3 different groups that are all completing a survey and receiving a total score. I want to know whether being high or low on some other survey...

    Started by lsrms3‎, 08-15-2014 01:30 PM
    • Replies: 0
    • Views: 115
    08-15-2014, 01:30 PM Go to last post
  16. Mediation, Bootstrapping and Sample Size

    I'm new to statistics overall, and even newer to mediation but I'm attempting to analyze data using Process for SPSS. Before anything else, do I need...

    Started by lsrms3‎, 08-12-2014 01:44 PM
    bootstrap, bootstrapping, mediation, mediation analysis, sample size
    • Replies: 2
    • Views: 133
    08-15-2014, 01:22 PM Go to last post
  17. Basic hypothesis question - variables

    Hello, I am new to statistics so please excuse my ignorance. My question relates to a hypothesis which I would like to test. I know that...

    Started by funnyman‎, 08-14-2014 05:39 AM
    hypothesis, variables
    • Replies: 2
    • Views: 105
    08-14-2014, 07:53 AM Go to last post
  18. Data Analysis Design Question

    Hi All, first timer here. I have data and am at a loss for how to analyze it to get at what I'm interested in. I will try and explain what I have and...

    Started by jennigold‎, 08-13-2014 10:22 PM
    • Replies: 0
    • Views: 109
    08-13-2014, 10:22 PM Go to last post
  19. Advice needed on how to analyze categ data

    Hoping someone out there can provide some assistance. Here is my situation. I have two categorical variables (each with four levels....

    Started by tobrien‎, 08-12-2014 04:38 PM
    • Replies: 0
    • Views: 151
    08-12-2014, 04:38 PM Go to last post
  20. Justifying data analysis

    Hi I have carried out a study looking at the effectiveness of speech synthesis tools on the iPad in allowing pupils with dyslexia to access written...

    Started by doodlebug752000‎, 08-11-2014 10:34 AM
    • Replies: 4
    • Views: 135
    08-11-2014, 11:40 AM Go to last post
  21. Unhappy Experiment With Fictitious Data

    After a semester full of open-note/curve graded exams and very few homework assignments, our stats professor decided that our final project would...

    Started by Cassiology‎, 12-08-2013 11:21 AM
    experiment, make money, paid, project, tutor needed
    • Replies: 6
    • Views: 621
    08-10-2014, 09:36 PM Go to last post
  22. Simple slopes - positive B for a negative slope ? :S

    EDIT - I've resolved what was causing the below issue! The issue arose because using 0 to make individual value of thinness a constant when all...

    Started by artemisynn‎, 08-10-2014 09:25 PM
    • Replies: 0
    • Views: 113
    08-10-2014, 09:25 PM Go to last post
  23. Why is my contrast sig.in a 1-way but no sig. interaction in a 2-way ANOVA

    Hi, So I had a 2(analytical task, control task) by 2(rating: confidence, liking) design that I incorrectly put into a One-way ANOVA with planned...

    Started by Socstats‎, 08-09-2014 07:12 PM
    anova, interaction, planned contrast
    • Replies: 1
    • Views: 122
    08-09-2014, 10:24 PM Go to last post
  24. Exclamation Please, I need help in statistics interpretation!

    Hello, I am a French student in psychology and I am currently using spss to analyze my research project's results. I work on the perception of...

    Started by camillec‎, 08-09-2014 01:58 AM
    • Replies: 0
    • Views: 108
    08-09-2014, 01:58 AM Go to last post
  25. Desperate call for statistics help

    Hello, I've just finished my placement year in my undergraduate degree but I'm really stuck with which statistical tests I need, and how to input the...

    Started by GeorgiaC‎, 08-08-2014 12:09 PM
    • Replies: 6
    • Views: 176
    08-08-2014, 04:35 PM Go to last post
  26. Affordable individual license stats software?

    Hi all, As my education in math and statistics progresses I think statistical consulting might become a good way to make a little money on the...

    Started by bruin‎, 08-06-2014 12:36 AM
    • Replies: 9
    • Views: 272
    08-07-2014, 09:02 PM Go to last post
  27. Dimensionality interpretation

    Hi, could somebody help me with interpreting this results of one 30-item (dichotic) test, please? Namely, I was surrprised by the very-very low Beta...

    Started by Martin Marko‎, 08-07-2014 07:24 AM
    • Replies: 0
    • Views: 114
    08-07-2014, 07:24 AM Go to last post
  28. Stats Advice Needed

    Hi Everyone, I've just recently started a PhD (In January) and, ashamed as I am to admit it, I am struggling a bit with the stats for my first...

    Started by c_phillips4‎, 08-06-2014 01:05 PM
    • Replies: 3
    • Views: 159
    08-07-2014, 07:17 AM Go to last post
  29. Statistic for Nominal vs. Scale Data

    Hi Everyone, I would like to find if there are statistically significant relationships between two types of data (I'm using SPSS): nominal and...

    Started by herwitz‎, 08-03-2014 10:11 AM
    • Replies: 5
    • Views: 235
    08-06-2014, 12:15 AM Go to last post
  30. Question V.low sample size - what stats?

    Hi there, I'm currently doing the analysis for my dissertation and am really struggling. Basically I measured household responsibility (HHR) in...

    Started by tamsynann‎, 08-01-2014 04:39 AM
    • Replies: 5
    • Views: 185
    08-06-2014, 12:06 AM Go to last post
  31. Logistic regression

    Dear everybody, I need some help with logistic regression. I'm trying to predict likelihood of consuming psychoactive drugs and practicing risk...

    Started by skraljev‎, 08-01-2014 08:09 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 413
    08-01-2014, 03:45 PM Go to last post
  32. Anything wrong w mixing estimated factor scores and raw variables in cluster analysis

    Hi folks, I have a number of continuous socio demographic variables that I have condensed using PCA into 8 factors representing composites like...

    Started by mike n‎, 07-30-2014 04:26 PM
    • Replies: 0
    • Views: 168
    07-30-2014, 04:26 PM Go to last post
  33. Response Feature Analysis--Word List Recall

    Hi, I think I'm looking at response feature analysis, but I'm not sure how to go about this. FYI, this post refers only to providing descriptive...

    Started by jcr‎, 07-28-2014 01:13 AM
    rate of improvement, response feature analysis, slope, word list recall
    • Replies: 1
    • Views: 140
    07-28-2014, 04:18 PM Go to last post
  34. Relationship between dependent variables only

    I am looking at the relationship between a number of dependent variables, I want to look at whether a measure of stress correlates to 3 meausres of...

    Started by Aimee‎, 06-28-2011 09:52 AM
    • Replies: 3
    • Views: 1,778
    07-27-2014, 09:39 PM Go to last post
  35. Forming correct grouping variables for analysis

    Hi. I have been given a dataset that I need to analyse. The questions were asked by a parent about whether their children have 1. no allergies, 2....

    Started by CassandraG‎, 07-25-2014 10:23 PM
    • Replies: 1
    • Views: 121
    07-27-2014, 06:53 PM Go to last post
  36. Statistically correct to compare two Spearman's ρ-Vaules directly?

    Hello statistic-community :wave: My sample size is approx. 1.500. I have different variables (A, B, C, D) which are all ordinal scaled. I have...

    Started by gentix‎, 07-17-2014 05:26 AM
    bivariate correlations, effect sizes, fisher's z-transformed, spearman's rho
    • Replies: 4
    • Views: 509
    07-27-2014, 05:11 AM Go to last post
  37. chi square test

    Say that we have 3 trials. On each trial, we are trying to verify whether for each stimulus X, we have a reponse Y. For example I have a rat and...

    Started by carlajosef‎, 07-24-2014 09:48 PM
    • Replies: 2
    • Views: 171
    07-27-2014, 02:01 AM Go to last post
  38. Selecting an experimental design

    Hi everyone, I am designing an experiment where I manipulate the composition of a 3 person group. For example, the number of freshmen per group,...

    Started by g2007‎, 07-26-2014 10:33 PM
    • Replies: 0
    • Views: 151
    07-26-2014, 10:33 PM Go to last post
  39. interpreting ModMed results

    Can we interpret ModMed results if our indirect effect is significant (Class Intervals don't include zero) but our interactions are not significant...

    Started by psy_vm‎, 07-24-2014 02:32 AM
    data analysis, interpretation, moderated mediation, regression, significance
    • Replies: 2
    • Views: 173
    07-24-2014, 04:05 AM Go to last post
  40. Interpreting Mediation results

    Hello, I have a few questions regarding interpretation of my results for Mediation using Hayes' Process macro. The key point for finding...

    Started by psy_vm‎, 07-24-2014 02:25 AM
    data analysis, interpretation, macros, mediation, regression
    • Replies: 0
    • Views: 153
    07-24-2014, 02:25 AM Go to last post
  41. help with choosing the right statistics tests :)

    Hello! I'm currently studying my Masters and struggling with working out which statistical tests I'm using. I'm basically looking into a 30-day...

    Started by rainbowfire‎, 07-21-2014 10:17 AM
    • Replies: 5
    • Views: 273
    07-22-2014, 10:14 PM Go to last post
  42. Test-Retest Reliability Coefficient

    Hi Folks, Hopefully this is a relatively easy question. I collected data on a measure at two time points, and I would like to run a test-retest...

    Started by herwitz‎, 07-22-2014 08:35 AM
    • Replies: 6
    • Views: 261
    07-22-2014, 08:48 PM Go to last post
  43. Missing Data - Scale Validation

    Hi everyone, I am working to validate a 10-item scale, 5-point Likert response format in a sample of 673. Trying to find a "happy medium" for all...

    Started by tetrandra‎, 07-17-2014 01:49 AM
    hellllllp, likert scale, mean substitution, missing data
    • Replies: 6
    • Views: 273
    07-22-2014, 07:37 PM Go to last post
  44. Interpreting multiple mediations: significant total, but n.s. individual mediation

    Hi, I have a question about interpreting a result I've just discovered using Hayes's INDIRECT and PROCESS macros for SPSS. So, I have a variable X...

    Started by jonathanjong‎, 04-29-2014 04:17 PM
    • Replies: 1
    • Views: 288
    07-21-2014, 05:27 PM Go to last post
  45. Multilevel modeling - how to code individually varying time?

    I have data with a unique time structure - it measures hand washing compliance throughout a provider's shift during each patient encounter. We know...

    Started by oncearunner‎, 07-21-2014 02:23 PM
    • Replies: 1
    • Views: 175
    07-21-2014, 03:27 PM Go to last post
  46. Age and gender effects in neuropsychological tests

    Dear friends, I will try to ask it simple: Dependant variable: scores of a cognitive test (scale) independant variables: brain atrophy (yes,no),...

    Started by rezzak‎, 07-17-2014 07:51 AM
    age, cognitive, gender, sex
    • Replies: 3
    • Views: 174
    07-21-2014, 02:18 AM Go to last post
  47. Longitudinal data analysis with missing data points

    Hey, I am doing a study with event-related potentials on grammatical perception in infants. I have a longitudinal design, I measured the infants at...

    Started by AlsterElbe‎, 07-17-2014 06:50 AM
    • Replies: 1
    • Views: 178
    07-17-2014, 08:16 AM Go to last post
  48. ITT and per protocol analyses. How to do both and how to compare baseline measures.

    Hello, I have read about but cannot find the answer to my queries. I am doing a study looking at the effects of positive thinking (PT) and...

    Started by Jake-Finn‎, 12-18-2013 05:22 PM
    itt, manova, multilevel, per protocol, spss
    • Replies: 5
    • Views: 715
    07-16-2014, 10:33 PM Go to last post
  49. Chi-square Vs. Fisher's exact test (FET)

    I'd really like to have a statistician answer this because I cannot find the answer anywhere. Perhaps you could be kind enough to direct me towards...

    Started by helpwithstats‎, 06-03-2008 02:42 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 67,485
    07-16-2014, 10:01 PM Go to last post
  50. Correlation (and other analyses) when a lot of values for independent variable = 0.

    Hey guys. I have a basic stat question. I basically have two variables I'd like to correlate (and do other analyses eventually). The first one...

    Started by nightale‎, 07-12-2014 01:20 AM
    • Replies: 1
    • Views: 264
    07-15-2014, 12:14 AM Go to last post
  51. Linear regression or multivariate regression?

    Hi there, I am pretty much a newbie in statistics and I hope you can help. I have an experimental design where I analyze three time-windows before...

    Started by li_accident‎, 07-11-2014 02:51 AM
    compare coefficients, regression
    • Replies: 2
    • Views: 211
    07-15-2014, 12:09 AM Go to last post
  52. Lower and upper critical r meaning on a sample size calculation using G*Power

    Hello everyone! :) First of all, please excuse my English grammar errors/misspelling; I am a Frenchie who can’t find an answer on French forums......

    Started by machicka‎, 07-08-2014 02:12 PM
    • Replies: 2
    • Views: 304
    07-10-2014, 09:53 AM Go to last post
  53. type one error adjustment - Friedman test Wilcoxon post hoc

    Hello, I assessed reading competence with 5 different tasks (U1 - U5) three times (t1, t2, t3). This is how I proceeded so far to test for...

    Started by Marsali‎, 07-06-2014 05:37 PM
    • Replies: 0
    • Views: 192
    07-06-2014, 05:37 PM Go to last post
  54. multiple imputation in SPSS - how to pool the results (Friedman test)

    Good morning, I used Multiple imputation to get estimates for missings in a repeated measures design. I want to know about the sensitivity of a...

    Started by Marsali‎, 07-02-2014 03:40 AM
    • Replies: 2
    • Views: 269
    07-02-2014, 05:54 AM Go to last post
  55. Nominal covariate in RM ANOVA

    Hi there, I'm running a mixed ANOVA with repeated measures; with condition (control, intervention) and time (pre-test, post-test) as...

    Started by Veerle‎, 07-02-2014 05:07 AM
    • Replies: 0
    • Views: 131
    07-02-2014, 05:07 AM Go to last post
  56. Correlations in one group

    Hi, 1. purpose of the study / research question / hypotheses - I'm conducting a study about Physical Courage among veterans (that is why people...

    Started by urikugel‎, 07-01-2014 03:54 PM
    • Replies: 3
    • Views: 211
    07-02-2014, 01:59 AM Go to last post
  57. beginning of r

    Good morning to all, I need a step by step explaination of how to enter the data in r. I realized only that I have to create a world file where I...

    Started by cate‎, 07-01-2014 02:13 PM
    • Replies: 0
    • Views: 184
    07-01-2014, 02:13 PM Go to last post
  58. meta-analysis with different IV and DV?

    Hi all, I'm trying to help a colleague of mine with figuring out whether a meta-analysis might make sense. I don't know much about meta-analysis,...

    Started by Junes‎, 07-01-2014 10:23 AM
    • Replies: 0
    • Views: 151
    07-01-2014, 10:23 AM Go to last post
  59. Post comparing and accounting for temperature difference between two locations

    Hi, I'm a student currently undertaking my dissertation. The aim of my research is to try to gain an understanding of what informs people's...

    Started by RedAlice‎, 07-01-2014 10:00 AM
    comparison, t-test, temperature
    • Replies: 0
    • Views: 130
    07-01-2014, 10:00 AM Go to last post
  60. Why do means&error bars in an ANOVA graph depend on its factors and covariates?

    Hi all, I have a mixed-model design with between-subjects factors Group (treatment, control) and Difficulty (easy, hard), and within-subjects...

    Started by wildetudor‎, 06-29-2014 12:47 PM
    • Replies: 0
    • Views: 170
    06-29-2014, 12:47 PM Go to last post

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