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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: 11,648
    11-09-2005, 11:21 PM Go to last post
  1. 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, Yesterday 04:26 PM
    • Replies: 0
    • Views: 44
    Yesterday, 04:26 PM Go to last post
  2. 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: 80
    07-28-2014, 04:18 PM Go to last post
  3. 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: 1,704
    07-27-2014, 09:39 PM Go to last post
  4. 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: 78
    07-27-2014, 06:53 PM Go to last post
  5. 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: 217
    07-27-2014, 05:11 AM Go to last post
  6. 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: 109
    07-27-2014, 02:01 AM Go to last post
  7. 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: 96
    07-26-2014, 10:33 PM Go to last post
  8. 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: 103
    07-24-2014, 04:05 AM Go to last post
  9. 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: 73
    07-24-2014, 02:25 AM Go to last post
  10. 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: 172
    07-22-2014, 10:14 PM Go to last post
  11. 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: 157
    07-22-2014, 08:48 PM Go to last post
  12. 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: 195
    07-22-2014, 07:37 PM Go to last post
  13. 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: 241
    07-21-2014, 05:27 PM Go to last post
  14. 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: 129
    07-21-2014, 03:27 PM Go to last post
  15. 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: 115
    07-21-2014, 02:18 AM Go to last post
  16. 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: 129
    07-17-2014, 08:16 AM Go to last post
  17. 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: 640
    07-16-2014, 10:33 PM Go to last post
  18. 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: 66,119
    07-16-2014, 10:01 PM Go to last post
  19. 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: 223
    07-15-2014, 12:14 AM Go to last post
  20. 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: 152
    07-15-2014, 12:09 AM Go to last post
  21. 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: 216
    07-10-2014, 09:53 AM Go to last post
  22. 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: 146
    07-06-2014, 05:37 PM Go to last post
  23. 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: 198
    07-02-2014, 05:54 AM Go to last post
  24. 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: 89
    07-02-2014, 05:07 AM Go to last post
  25. 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: 158
    07-02-2014, 01:59 AM Go to last post
  26. 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: 141
    07-01-2014, 02:13 PM Go to last post
  27. 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: 114
    07-01-2014, 10:23 AM Go to last post
  28. 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: 91
    07-01-2014, 10:00 AM Go to last post
  29. 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: 129
    06-29-2014, 12:47 PM Go to last post
  30. Need help with missing values

    Participants completed 2 questionnaires at Time 1, and each questionnaire is being scored for empathy. Because of recording issues, I do not have an...

    Started by Yael‎, 06-29-2014 12:08 PM
    imputation, missing values
    • Replies: 0
    • Views: 93
    06-29-2014, 12:08 PM Go to last post
  31. Scores derived from variance specific for a factor

    Hi, I received a cooment from one of the reviewer but I do not understand what I should do. Here is short explanation of the study: This study...

    Started by arts‎, 06-25-2014 01:35 PM
    factor analysis
    • Replies: 5
    • Views: 269
    06-29-2014, 06:29 AM Go to last post
  32. Mediation analysis (Baron and Kenny)

    Hey, I have some problems concerning the analysis of a mediation model. If you guys could give me some tips that would be great! :) First of...

    Started by stl111‎, 06-27-2014 05:43 PM
    • Replies: 2
    • Views: 176
    06-28-2014, 01:21 PM Go to last post
  33. Testing interaction between measures which are in different units

    Hi, I have within-subject design (each subject came twice). One of the visits contained manipulation and another was a placebo. For each...

    Started by john.gelburg‎, 06-28-2014 06:02 AM
    anova
    • Replies: 0
    • Views: 182
    06-28-2014, 06:02 AM Go to last post
  34. I am terrible at statistics and need help regarding which analysis to choose

    Hi everyone, As my title states; statistics have always been very difficult for me. My teacher asked me to think about what analyses she could...

    Started by vanillaangel‎, 06-26-2014 03:30 PM
    • Replies: 5
    • Views: 253
    06-27-2014, 11:38 AM Go to last post
  35. Comparing exp and control groups in a mixed design with a comparatively small N

    My study investigates the type of dialogue and behavior between children working in groups on a class activity, with and without an intervention. It...

    Started by rsm‎, 06-26-2014 01:29 AM
    experimental, mixed anova, multiple datasets
    • Replies: 0
    • Views: 179
    06-26-2014, 01:29 AM Go to last post
  36. Queries regarding ANCOVA and MANCOVA

    In a pre-post test experimental study having 3x2 factorial design, there are: 1. two independent variables: (a) teaching methods (3...

    Started by statanx‎, 09-07-2012 02:26 AM
    3 Pages
    1 2 3
    • Replies: 43
    • Views: 4,489
    06-24-2014, 11:13 AM Go to last post
  37. interpreting multi-level logit model

    Hi, I have this output from Stata (an explanation of the variables follows). As far as I understand, the policyfoundation coefficient is...

    Started by winnie1825‎, 06-24-2014 09:32 AM
    logistic multilevel
    • Replies: 0
    • Views: 159
    06-24-2014, 09:32 AM Go to last post
  38. paired sample t-test for repeated measures in 1 subject

    I am conducting a psychology experiment. In my pilot study I analyze responses of one subject which ran through two conditions. The task is to...

    Started by Monstera‎, 06-23-2014 02:18 AM
    dependent, independent sample t-test, paired, t-test
    • Replies: 9
    • Views: 352
    06-23-2014, 05:51 AM Go to last post
  39. Low Cronbachs alpha when using a standardised measure- how do I explain this?

    Hi, for my thesis I conducted cronbachs alpha on several measures- the core questionnaire is the Five Facet Mindfulness Questionnaire (FFMQ). My...

    Started by MJag‎, 06-22-2014 07:39 AM
    • Replies: 3
    • Views: 232
    06-22-2014, 01:38 PM Go to last post
  40. How to analyze a variable measured on a Likert scale and its interaction with another

    I have to analyze this variable which consists of scores given to 3 items (1-9 scale). This "likert scale" measures "brand commitment" if thats...

    Started by Stefan Stefanov‎, 06-17-2014 07:31 AM
    interaction, method, spss
    • Replies: 1
    • Views: 223
    06-17-2014, 08:20 AM Go to last post
  41. SEM - total variance explained by model?

    Question #1: Is there any way to calculate the total amount of variance explained by an SEM model? My committee seems to think there is and they...

    Started by buntington‎, 06-15-2014 09:13 AM
    • Replies: 12
    • Views: 445
    06-17-2014, 01:50 AM Go to last post
  42. Violating ANCOVA "Homogeneity of Regression of Slopes"

    Hi all, I am working on a publication where I ran a 3-way mixed design ANCOVA. For one of my between-subjects IVs (gender) I found a significant...

    Started by TaylorOliver4‎, 06-16-2014 06:29 PM
    • Replies: 0
    • Views: 163
    06-16-2014, 06:29 PM Go to last post
  43. Interrater Reliability. Is MORE better?

    Which design is more powerful: testing interrater reliability with 2 judges or 4 judges? (citations appreciated)

    Started by bitor‎, 06-16-2014 12:47 PM
    interrater reliability, psychology, reliability
    • Replies: 3
    • Views: 125
    06-16-2014, 01:37 PM Go to last post
  44. Interaction effect not significant, but graph indicates otherwise...

    For my thesis I had two hypotheses regarding moderator/interaction effects: h1: Exisiting game experience (dependent, continous) moderates the...

    Started by rigest‎, 06-14-2014 03:21 PM
    • Replies: 8
    • Views: 297
    06-15-2014, 01:44 AM Go to last post
  45. Principal component analysis - problems with input data

    Hello everyone. As the title suggests, I have a problem with figuring out what data exactly to feed my PCA. The situation: I have a certain number...

    Started by PCAquestion‎, 06-14-2014 04:40 PM
    • Replies: 0
    • Views: 221
    06-14-2014, 04:40 PM Go to last post
  46. Analysis question

    My analysis is a 2 X 2 , looking at the influence of gender (male, female) & SES (middle class, poor) of a job candidate on how he is evaluated for a...

    Started by norajones‎, 06-14-2014 02:27 PM
    • Replies: 0
    • Views: 146
    06-14-2014, 02:27 PM Go to last post
  47. inter-rater reliability with multiple raters on spss statistics

    Hi everyone! I need help with a research assignment. I'm new to IBM SPSS statistics, and actually statistics in general, so i'm pretty overwhelmed. ...

    Started by redeyedfrog‎, 06-13-2014 10:36 PM
    • Replies: 0
    • Views: 201
    06-13-2014, 10:36 PM Go to last post
  48. Determining the right statistical test

    Please delete the thread :)

    Started by aviamo‎, 06-12-2014 12:10 PM
    • Replies: 0
    • Views: 214
    06-12-2014, 12:10 PM Go to last post
  49. Experiment design

    Hi I am designing an experiment for school and I don't know how best to describe the factorial design. I have three conditions, and I will be...

    Started by Shawnus‎, 06-01-2014 07:56 AM
    • Replies: 3
    • Views: 238
    06-12-2014, 10:16 AM Go to last post
  50. statistical symbols in microsoft word

    I've spent like 5 hours trying to figure out how to insert a bar (called overstrike or overline) over a word ... like the bar that goes over x for...

    Started by lissiemait‎, 06-07-2014 11:17 PM
    microsoft word, overstrike, statistics, symbols, word
    • Replies: 5
    • Views: 433
    06-09-2014, 11:33 PM Go to last post
  51. How to analyse..?

    Hi, I have a problem to choose a method for analysing data from my experiment. I have one within-subjects (all four stimuli presented to every...

    Started by registerStat‎, 06-06-2014 07:03 PM
    • Replies: 0
    • Views: 258
    06-06-2014, 07:03 PM Go to last post
  52. Cool Preacher&Hayes Process macro

    Hello friends! We are interested in the relationship of x on y, mediated by m. All variables are dichotomous except for x, which is continuous....

    Started by Psychstat‎, 06-06-2014 01:01 PM
    preacher&hayes
    • Replies: 1
    • Views: 206
    06-06-2014, 04:10 PM Go to last post
  53. Could really use some advice for my thesis!

    So I'm almost done with my thesis but I'm struggling with my last hypothesis. Some background information on my subject: I'm trying to find out what...

    Started by rigest‎, 06-06-2014 04:32 AM
    • Replies: 3
    • Views: 191
    06-06-2014, 06:26 AM Go to last post
  54. Nonparametric/Ranking Data Help!!

    Hi all, I am a PHD student attempting to come to grips with an analysis of some recent data. I have a repeated measures design. 220 students were...

    Started by kip_cheers‎, 06-03-2014 08:22 PM
    friedman test, nonparametric, rank, repeated measures
    • Replies: 0
    • Views: 191
    06-03-2014, 08:22 PM Go to last post
  55. Unhappy Sample size calculation for multiple regression

    Hi all! I am struggling with sample size calculations at the minute. I have looked everywhere but all I get is formulas. I have downloaded MedCalc...

    Started by Christie‎, 06-03-2014 04:58 PM
    correlation, multiple regression, power statistics, sample size calculation
    • Replies: 0
    • Views: 184
    06-03-2014, 04:58 PM Go to last post
  56. Autism behaviour - how to analyse data

    I'd like help how to use data on the behaviour of an autistic individual. In my work I'm taking care of an adult male with autism. He's in his...

    Started by therigidrook‎, 06-01-2014 01:51 PM
    • Replies: 4
    • Views: 213
    06-03-2014, 03:46 PM Go to last post
  57. Question: What type of experimental design do I have here?

    I feel a bit unsure and maybe you can help me. I've got the data of a big firm, where there is a population of 1400 administrative personnel...

    Started by womanfromthesea‎, 05-20-2014 03:49 PM
    • Replies: 5
    • Views: 322
    06-03-2014, 11:15 AM Go to last post
  58. How to analyze parents' talk when codes are not normal in a mixed design?

    This is a but tricky to explain, so I will do my best. I am trying to analyze coded talk by parents for three different categories of objects. I...

    Started by dsiegel06‎, 05-30-2014 05:40 PM
    mixed anova, non-parametric, parent talk
    • Replies: 1
    • Views: 230
    06-03-2014, 03:06 AM Go to last post
  59. HELP with experimental analysis (fear conditioning)

    I am running an olfactory fear conditioning procedure in which 2 odors (odor A/ odor B) are either paired with a footshock (CS+) or absence of...

    Started by jzunder‎, 05-29-2014 05:35 PM
    anova, mixed between anova, repeated measure anova, spss
    • Replies: 1
    • Views: 252
    06-02-2014, 07:02 AM Go to last post
  60. Not sure if i chose the correct statistical test to analyze data

    I'm trying to help a friend out with the statistics parts of her bachelors paper. Right now she is still the the planing stages and has not gathered...

    Started by hugstari‎, 05-30-2014 07:06 AM
    chi sq test, questionnaire, statistical design
    • Replies: 0
    • Views: 175
    05-30-2014, 07:06 AM Go to last post

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