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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: 22,707
    11-09-2005, 11:21 PM Go to last post
  1. 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: 561
    08-12-2014, 04:38 PM Go to last post
  2. 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: 734
    08-11-2014, 11:40 AM Go to last post
  3. 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: 1,862
    08-10-2014, 09:36 PM Go to last post
  4. 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: 693
    08-10-2014, 09:25 PM Go to last post
  5. 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: 533
    08-09-2014, 10:24 PM Go to last post
  6. 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: 560
    08-09-2014, 01:58 AM Go to last post
  7. 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: 716
    08-08-2014, 04:35 PM Go to last post
  8. 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: 1,140
    08-07-2014, 09:02 PM Go to last post
  9. 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: 493
    08-07-2014, 07:24 AM Go to last post
  10. 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: 647
    08-07-2014, 07:17 AM Go to last post
  11. 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: 728
    08-06-2014, 12:15 AM Go to last post
  12. 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: 779
    08-06-2014, 12:06 AM Go to last post
  13. 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: 1,964
    08-01-2014, 03:45 PM Go to last post
  14. 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: 620
    07-30-2014, 04:26 PM Go to last post
  15. 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: 682
    07-28-2014, 04:18 PM Go to last post
  16. 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: 2,615
    07-27-2014, 09:39 PM Go to last post
  17. 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: 594
    07-27-2014, 06:53 PM Go to last post
  18. 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: 6,545
    07-27-2014, 05:11 AM Go to last post
  19. 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: 643
    07-27-2014, 02:01 AM Go to last post
  20. 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: 496
    07-26-2014, 10:33 PM Go to last post
  21. 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: 587
    07-24-2014, 04:05 AM Go to last post
  22. 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: 2,071
    07-24-2014, 02:25 AM Go to last post
  23. 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: 849
    07-22-2014, 10:14 PM Go to last post
  24. 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: 923
    07-22-2014, 07:37 PM Go to last post
  25. 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: 686
    07-21-2014, 05:27 PM Go to last post
  26. 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: 572
    07-21-2014, 03:27 PM Go to last post
  27. 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: 530
    07-21-2014, 02:18 AM Go to last post
  28. 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: 533
    07-17-2014, 08:16 AM Go to last post
  29. 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: 2,266
    07-16-2014, 10:33 PM Go to last post
  30. 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: 89,229
    07-16-2014, 10:01 PM Go to last post
  31. 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: 842
    07-15-2014, 12:14 AM Go to last post
  32. 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: 885
    07-15-2014, 12:09 AM Go to last post
  33. 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: 1,322
    07-10-2014, 09:53 AM Go to last post
  34. 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: 654
    07-06-2014, 05:37 PM Go to last post
  35. 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: 2,763
    07-02-2014, 05:54 AM Go to last post
  36. 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: 602
    07-02-2014, 05:07 AM Go to last post
  37. 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: 698
    07-02-2014, 01:59 AM Go to last post
  38. 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: 542
    07-01-2014, 02:13 PM Go to last post
  39. 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: 998
    07-01-2014, 10:23 AM Go to last post
  40. 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: 445
    07-01-2014, 10:00 AM Go to last post
  41. 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: 517
    06-29-2014, 12:47 PM Go to last post
  42. 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: 499
    06-29-2014, 12:08 PM Go to last post
  43. 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: 984
    06-29-2014, 06:29 AM Go to last post
  44. 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: 997
    06-28-2014, 01:21 PM Go to last post
  45. 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: 525
    06-28-2014, 06:02 AM Go to last post
  46. 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: 963
    06-27-2014, 11:38 AM Go to last post
  47. 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: 683
    06-26-2014, 01:29 AM Go to last post
  48. 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: 42
    • Views: 8,804
    06-24-2014, 11:13 AM Go to last post
  49. 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: 736
    06-24-2014, 09:32 AM Go to last post
  50. 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: 1,220
    06-23-2014, 05:51 AM Go to last post
  51. 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: 738
    06-22-2014, 01:38 PM Go to last post
  52. 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: 631
    06-17-2014, 08:20 AM Go to last post
  53. 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: 5,560
    06-17-2014, 01:50 AM Go to last post
  54. 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: 1,058
    06-16-2014, 06:29 PM Go to last post
  55. 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: 605
    06-16-2014, 01:37 PM Go to last post
  56. 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: 1,224
    06-15-2014, 01:44 AM Go to last post
  57. 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: 552
    06-14-2014, 04:40 PM Go to last post
  58. 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: 451
    06-14-2014, 02:27 PM Go to last post
  59. 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: 897
    06-13-2014, 10:36 PM Go to last post
  60. Determining the right statistical test

    Please delete the thread :)

    Started by aviamo‎, 06-12-2014 12:10 PM
    • Replies: 0
    • Views: 627
    06-12-2014, 12:10 PM Go to last post

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