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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: 27,530
    11-10-2005, 12:21 AM Go to last post
  1. Smile One way ANOVA/ Repeated measures help to choose a test to run

    Hi all, I have some questions that I need to be working on that are related to one way anova and repeated measures. I am not quite sure what tests...

    Started by ari2015‎, 02-18-2014 01:30 AM
    • Replies: 3
    • Views: 2,642
    02-22-2014, 04:22 AM Go to last post
  2. Red face Paired samples t test or ANOVA

    Good evening, I am glad I found this forum, as I have what some might find to be a simple question, but what is a neural pathway creating question...

    Started by Prohet‎, 02-18-2014 11:33 PM
    • Replies: 5
    • Views: 1,387
    02-19-2014, 03:40 PM Go to last post
  3. Comparison of psychophysical methods for sensitivity to small changes

    Hi all I have two different psychophysical clinical test methods I can use to measure a particular quality. For the sake of explanation, lets say...

    Started by Zorro‎, 02-14-2014 04:53 PM
    evaluate, physhophysics, test method
    • Replies: 1
    • Views: 1,225
    02-18-2014, 05:20 PM Go to last post
  4. Lightbulb Comparing populations of Twins

    Hey guys, first post here, would really appreciate some clarification on a few things in my study. I'm currently performing an online study in...

    Started by Schwartz Champ‎, 02-13-2014 10:50 AM
    • Replies: 0
    • Views: 971
    02-13-2014, 10:50 AM Go to last post
  5. NO COMMON FACTOR VARIANCE in factoral analysis?

    Hi all, I have been told there is a term to describe the scenario when there is no (significant) common factor variance in a factor analysis...

    Started by ShoeBee‎, 02-12-2014 11:54 AM
    factor analysis, terms
    • Replies: 0
    • Views: 978
    02-12-2014, 11:54 AM Go to last post
  6. What can I do with this data?

    Hi, I want to assess the impact of an intervention on social climate on an inpatient ward. I have the mean scores on a questionnaire across a...

    Started by Gpsych‎, 02-12-2014 05:14 AM
    • Replies: 0
    • Views: 934
    02-12-2014, 05:14 AM Go to last post
  7. "Repeated measures" = "within subjects"?

    Hi everyone, I realised I have a doubt about a very simple concept in statistics, that of 'repeated measures'. I've always thought this is just...

    Started by wildetudor‎, 02-07-2014 06:42 AM
    • Replies: 5
    • Views: 1,615
    02-09-2014, 05:25 AM Go to last post
  8. Mixed ANOVA difficulty ! HELP NEEDED

    Hello... im relatively new to psychology statistics and struggling to understand some things. My experiment is a 2 (common vs distinct faces )x 2...

    Started by retroandbeyond‎, 02-08-2014 05:35 PM
    anova, interaction, psychology, statistics
    • Replies: 0
    • Views: 1,132
    02-08-2014, 05:35 PM Go to last post
  9. Paired T-test effect size

    Can someone please direct me to a calculation for an effect size for a paired samples t-test along with a reference? Thanks in advance.

    Started by mbetennis01‎, 02-07-2014 09:58 AM
    effect size, paired samples t-test
    • Replies: 6
    • Views: 3,043
    02-07-2014, 05:17 PM Go to last post
  10. Implications of low standard deviation for a moderator

    Hello I have a model where Y = b0 +b1*X+ b2*Z +b3*XZ. Z is a moderator in my theory. In my data, Z is measured on a 5 point Likert type scale with...

    Started by rsg‎, 02-07-2014 05:12 PM
    interaction effects, low variance in moderator, moderation
    • Replies: 0
    • Views: 1,173
    02-07-2014, 05:12 PM Go to last post
  11. questinnaire help for a noob :)

    i am a statsitics newbie and have to do a questionnaire research on pain in children. it's a simple questionnaire with 12 questions, and the...

    Started by ivn‎, 02-07-2014 07:54 AM
    • Replies: 1
    • Views: 1,021
    02-07-2014, 01:45 PM Go to last post
  12. Simultaneous regressions (?)

    Hi, I wonder whether some of you may have some modelling suggestions. I have a dyadic dataset. For example, the DV could be "I like the other...

    Started by lbv‎, 02-06-2014 04:06 AM
    • Replies: 2
    • Views: 1,418
    02-07-2014, 03:32 AM Go to last post
  13. How to enter ordinal data into SPSS?

    Hi I just wanted to know if there is supposed to be a different way to enter ordinal data, I have never done this before!

    Started by Preeti21‎, 04-12-2011 11:46 PM
    • Replies: 12
    • Views: 15,666
    02-06-2014, 10:31 PM Go to last post
  14. Is 3x2 Factorial ANOVA the right test for this situation??

    I'm helping a friend do some research in public schools. He is trying to determine if the achievement growth of 6th graders in K-8 schools is...

    Started by aballard‎, 02-04-2014 09:04 PM
    • Replies: 6
    • Views: 3,037
    02-05-2014, 01:01 PM Go to last post
  15. HELP PLEASE - TEST (and general) CONFUSION

    Hi, coudl someone please advise me on which test I should be using for the following - I'm assessing the affect of a new ward timetable on...

    Started by Gpsych‎, 02-05-2014 09:19 AM
    • Replies: 3
    • Views: 1,169
    02-05-2014, 11:56 AM Go to last post
  16. Comparing binary response rates from unequally-sized populations

    Hi all, I would greatly appreciate some help with a behavioural economics experiment I am running. It is a within-subjects design with 3...

    Started by ShrewsMile‎, 02-04-2014 09:10 AM
    • Replies: 0
    • Views: 1,189
    02-04-2014, 09:10 AM Go to last post
  17. Wanted: Psychology genius who can help me figure out an experimental design

    Hi everyone, Thanks for popping in to help! I have a study idea but i'm getting into a little bit of a muddle with the most important part..the...

    Started by Ant_Thompson‎, 02-02-2014 11:38 AM
    • Replies: 1
    • Views: 1,123
    02-02-2014, 02:01 PM Go to last post
  18. How to report pairewise comparisons in your article?

    I found a main effect with some significant differences between my variables (i.e. as seen in the pairewise comparisons with Bonferroni correction)....

    Started by Jeroen‎, 01-29-2014 09:43 AM
    • Replies: 0
    • Views: 991
    01-29-2014, 09:43 AM Go to last post
  19. Question Relative and absolute bias - Likert-type data

    I'm working on a data set which was collected through a questionnaire by a certain regulatory institution. 50 institutions (whole population of that...

    Started by ajvar‎, 01-24-2014 04:25 AM
    absolute, bias, likert, relative
    • Replies: 1
    • Views: 2,082
    01-27-2014, 07:21 AM Go to last post
  20. Is it okay to allow insignificantly correlated error terms in SEM models

    Hi, I am running an SEM model and I am allowing two error terms to be correlated because their indicators come from the same test. The correlation...

    Started by myautumn28‎, 01-23-2014 01:55 PM
    • Replies: 4
    • Views: 2,976
    01-24-2014, 06:26 PM Go to last post
  21. URGENT** ANOVA or Regression - Please help

    Hi, I would really appreciate some help with this. I am looking to see if employees' organisational history (such as voluntary/involuntary turnover)...

    Started by CA92‎, 01-24-2014 10:50 AM
    anova, assumptions, levene, levene's test, regression analysis
    • Replies: 0
    • Views: 932
    01-24-2014, 10:50 AM Go to last post
  22. Decomposing ANOVAs - several questions...

    Hi everyone, I am rather unclear about several aspects of how decomposition of effects in ANOVAs should be done. I'll try to phrase these doubts...

    Started by wildetudor‎, 12-18-2013 06:41 PM
    • Replies: 6
    • Views: 2,219
    01-23-2014, 04:45 AM Go to last post
  23. propensity score matching (chatbox conversation)

    01/22 17:35 Jake: i have never studied PSM in any detail but the wikipedia-level summaries i have read make it sound like exactly the same thing as...

    Started by Jake‎, 01-22-2014 08:12 PM
    • Replies: 1
    • Views: 1,357
    01-22-2014, 10:01 PM Go to last post
  24. Best Omnibus in Lieu of Multiple Ind.-Samples t-Tests

    Howdy Stats Talkers, I was hoping you guys might be able to help me figure out which statistical technique would be best here. I'm analyzing data...

    Started by avantgardener‎, 01-13-2014 08:01 AM
    • Replies: 4
    • Views: 1,256
    01-21-2014, 12:00 PM Go to last post
  25. which statistical analysis is suitable for this study?

    Hi guys, Briefly describing the study: - 1 IV with three levels (boring, neutral, & fun condition) - 3 DV's (time perception, task rating,...

    Started by buket93‎, 01-19-2014 01:42 PM
    psychology, reporting statistics, research design
    • Replies: 1
    • Views: 1,042
    01-21-2014, 03:26 AM Go to last post
  26. Should this really be an ANOVA study?

    Hi, I am running a between subjects study for my senior capstone. I will be looking at smell accuracy in either the right or left nostril of my...

    Started by shayriv‎, 01-19-2014 11:07 PM
    • Replies: 2
    • Views: 999
    01-21-2014, 03:22 AM Go to last post
  27. Which model fit indices should I use?

    I am trying to use multi-group CFA to evaluate measurement invariance of a new scale. The scale is 5 items (scores for each item range from 0-112...

    Started by mem162000‎, 01-20-2014 11:37 AM
    • Replies: 2
    • Views: 1,240
    01-21-2014, 03:13 AM Go to last post
  28. Extrapolating percentile ranks?

    Hi all, I have a feeling my question has a simple answer but I've searched and searched and cannot find it anywhere, perhaps you can help! I...

    Started by nineotwo‎, 01-19-2014 02:18 PM
    • Replies: 0
    • Views: 1,779
    01-19-2014, 02:18 PM Go to last post
  29. Use z-scores in Repeated Measures ANCOVA?

    Hi everyone, My dissertation has participants answer three questions at four different timepoints in a video. For each timepoint, I have averaged...

    Started by rkprice‎, 12-18-2013 07:51 AM
    ancova, repeated measures, standardize, z-scores
    • Replies: 1
    • Views: 2,041
    01-18-2014, 09:13 PM Go to last post
  30. correlated dependent variables with repeated measures

    Should I use classic repeated measures, classic MANOVA, mixed model or none of the above? Study: IV treatment - dichotomous - treatment or...

    Started by alisa‎, 12-27-2013 07:35 AM
    • Replies: 1
    • Views: 1,496
    01-18-2014, 09:08 PM Go to last post
  31. Is a factorial design appropriate here?

    My study will investigate children's vocabulary development during parent-mediated interactive electronic storybook reading. I want to design 6...

    Started by bernardpar‎, 01-17-2014 08:49 AM
    • Replies: 3
    • Views: 1,342
    01-17-2014, 10:09 AM Go to last post
  32. Comparing differences between groups over time with nominal variables

    Hi all, I'd like to compare differences between groups over time, but I only have a nominal variable to work with ('yes', 'no', 'unsure'). It's a 2 x...

    Started by Ella_10‎, 01-17-2014 01:45 AM
    • Replies: 0
    • Views: 1,108
    01-17-2014, 01:45 AM Go to last post
  33. How to perform contrast analyses on ANOVA interaction?

    Hi all! :) For my research I have a 2 x 3 design, both variables are nominal. Therefore I performed a two-way ANOVA, or Univariate in SPSS. For...

    Started by jant90‎, 01-15-2014 12:23 PM
    • Replies: 2
    • Views: 1,328
    01-15-2014, 06:06 PM Go to last post
  34. Do I need to worry about normality, if the DV is a 1-item 10point likert scale ?

    Dear all, I hope you can help me with the following question My design was a 2 x 2 with a single item measuring responsibility on a 10 point...

    Started by plush‎, 01-14-2014 11:29 AM
    normality, parametric, ranked
    • Replies: 3
    • Views: 1,408
    01-14-2014, 01:17 PM Go to last post
  35. What Is F in Univariate Anova Report?

    Hi, can someone tell me where/what is F(_,_) when reporting a univariate anova result? where do i get this from?

    Started by Gpsych‎, 11-21-2013 11:23 AM
    • Replies: 7
    • Views: 1,721
    01-14-2014, 10:53 AM Go to last post
  36. Statistical significance of age difference between male and female subjects

    "The ages of the male group were 20.51.2 and the ages of the females 19.22.3. The difference in mean age between the groups is not...

    Started by wildetudor‎, 01-12-2014 09:30 AM
    • Replies: 4
    • Views: 1,939
    01-13-2014, 04:35 PM Go to last post
  37. what (depedent) variable to use when checking normality test

    Hi there, I'm testing whether there is a difference in binge drinkers or Non-binge drinkers verbal declarative memory and processing speed. I...

    Started by Bullseye‎, 01-11-2014 11:07 AM
    • Replies: 3
    • Views: 1,536
    01-12-2014, 07:51 AM Go to last post
  38. Please advise me on the best kind of regression for ordinal data which was factored

    I started with a large number of Likert-type questions containing 5-point attitude scores. I then ran these questions through principal component...

    Started by memomemootoo‎, 01-11-2014 03:39 PM
    • Replies: 0
    • Views: 1,168
    01-11-2014, 03:39 PM Go to last post
  39. Which test should I use?

    Hi all! I'm studying the expression of C-Fos (a stress hormone) in mice brains. Basically, I'm analysing one specific area of the brain and I...

    Started by OlivierJoyal‎, 01-11-2014 02:50 PM
    anova, spss
    • Replies: 2
    • Views: 881
    01-11-2014, 03:30 PM Go to last post
  40. Need help choosing statistical test

    Hey, I am conducting a study for my dissertation and I would like to know whether binge drinkers scored worse than non-binge drinkers on 3...

    Started by LehcarP‎, 01-10-2014 03:59 PM
    • Replies: 1
    • Views: 850
    01-10-2014, 05:03 PM Go to last post
  41. Exploratory Study -- ordinal data questions

    Hello all, Im a first time poster but have gained much insight reading through past threads. Im running an exploratory study, containing a few...

    Started by JB12‎, 01-10-2014 10:11 AM
    ordinal data
    • Replies: 3
    • Views: 1,362
    01-10-2014, 12:22 PM Go to last post
  42. Scale conversion based on previous research

    Hello, I am using an agent-based model to simulate emotional contagion in teams. I have an article that has determined the "shift" of within person...

    Started by Chauny27‎, 01-09-2014 05:48 PM
    • Replies: 0
    • Views: 1,335
    01-09-2014, 05:48 PM Go to last post
  43. Methods for verifying intependent variable integrity. How?

    Can you help me by describing a few methods for verifying independent variable integrity in single subject experiments? Thank you! :)

    Started by AllieViet‎, 01-09-2014 01:06 PM
    independent variable, integrity, single subject experiment
    • Replies: 0
    • Views: 846
    01-09-2014, 01:06 PM Go to last post
  44. What statistic to use? Weighting of word frequencies in psychology research study...

    Hi there, I am a psychology researcher and new to this forum. I am currently trying to figure out if there is an appropriate statistical test that I...

    Started by mcdunley‎, 01-08-2014 07:28 AM
    • Replies: 5
    • Views: 1,500
    01-09-2014, 09:13 AM Go to last post
  45. Analyzing data based on groups, but how to create this groups

    Hello, We are conducting a study about resilience in adolescents. Our data is based on self-report questionnaires. We've got 2 independent...

    Started by BurningFlame‎, 01-08-2014 04:37 AM
    creating groups
    • Replies: 1
    • Views: 848
    01-08-2014, 07:19 AM Go to last post
  46. SPSS syntax for MANOVA Planned Contrasts

    I want to do planned contrast analysis for each pair of age_group. I've 6 DVs(which you can see in the attachment) and the Male Variable is also...

    Started by fayyazcivil‎, 01-07-2014 11:59 AM
    • Replies: 0
    • Views: 1,917
    01-07-2014, 11:59 AM Go to last post
  47. Types of ANOVA

    Hi, I'm really sorry to ask what's probably a silly question, but I have a hypothetical scenario and I'm not sure what type of ANOVA test would be...

    Started by kate03‎, 01-07-2014 11:31 AM
    • Replies: 0
    • Views: 703
    01-07-2014, 11:31 AM Go to last post
  48. Testing if Rank Data varies significantly from 0

    Hi, I've done a survey with an 11 point Likert scale (-5 to +5, with 0).There are 30 questions total in the survey, with ~800 responses. I have...

    Started by milnehouse‎, 12-30-2013 06:02 PM
    mann-whitney u, median, non-parametric, rank
    • Replies: 1
    • Views: 905
    01-01-2014, 08:48 PM Go to last post
  49. Factor analysis with different groups

    Hello, I was hoping somebody might be able to help with my question about factor analysis. If I am looking to create factor scores for three...

    Started by bobolococo‎, 12-23-2013 09:17 AM
    • Replies: 0
    • Views: 1,242
    12-23-2013, 09:17 AM Go to last post
  50. Correcting for ties in Kruskal-Wallis

    Hi, I'm new to this forum so I hope I've posted this in the right place! I was just wondering if anybody could clarify something with with...

    Started by kate03‎, 12-21-2013 06:39 AM
    • Replies: 5
    • Views: 5,296
    12-22-2013, 08:45 AM Go to last post
  51. Correlating factor scores and calculating marker scale scores

    Hi, I am doing a lexical study, identifying personality factor structure of the Malay language adjectives. I have three datasets: 1) The Malay...

    Started by jay71‎, 12-18-2013 11:36 PM
    correlations, factor scores, marker scale scores, validation
    • Replies: 0
    • Views: 1,140
    12-18-2013, 11:36 PM Go to last post
  52. Analysis of Variance for Nominal Data

    Hi there, I would like to ask if there is statistical test named Maximum Likelihood Analysis of Variance (for nominal data). I have viewed it on one...

    Started by jay1ph‎, 12-01-2013 10:15 AM
    • Replies: 2
    • Views: 1,324
    12-17-2013, 02:55 PM Go to last post
  53. Lightbulb Interrater Agreement using intraclass correlation coefficient

    Hello, has some one used ICC to test the interrater agreement? Here is my problem. I've two groups of subjects. One group (n=30) has watched an...

    Started by amygdalaaaa‎, 12-03-2013 07:56 AM
    • Replies: 1
    • Views: 1,100
    12-17-2013, 02:38 PM Go to last post
  54. Smile How to analyse my research question...

    Hi all, I am wondering what would be the best way to analyse my research question. I am looking into whether childhood experience (child abuse...

    Started by bobolococo‎, 12-17-2013 10:06 AM
    • Replies: 7
    • Views: 818
    12-17-2013, 01:00 PM Go to last post
  55. Question One variable influencing the other

    Hey everyone! I'm new to statistics and would really appreciate some help. I have this one project, that I need to finish, and the objective of it...

    Started by Mpsych‎, 12-15-2013 07:31 PM
    • Replies: 2
    • Views: 1,067
    12-16-2013, 04:24 PM Go to last post
  56. Calculating confidence intervals of the average deviation from the mean

    Hello. Sorry for my horrible english. As part of my masters thesis, I have analysed a large ammount of text from COP19, and coded the text. As a...

    Started by LukaDalum‎, 12-16-2013 05:32 AM
    • Replies: 0
    • Views: 847
    12-16-2013, 05:32 AM Go to last post
  57. To report or not to report posthocs for a 'back up' test

    Short version - I have run some non-parametric tests (Friedman) as sort of backup to a ANOVA because of an assumption violation - should I report the...

    Started by Esme‎, 12-10-2013 04:40 PM
    follow-up, non-parametric tests, paired comparisons, reporting results
    • Replies: 4
    • Views: 1,298
    12-15-2013, 12:19 AM Go to last post
  58. what test to use?

    Dr. Bradshaw, a dean at a university wonders whether performance by students in her school has fallen this semester. Students in the school of...

    Started by steve5368‎, 12-12-2013 03:24 AM
    • Replies: 1
    • Views: 903
    12-12-2013, 04:02 AM Go to last post
  59. tricky question.. within session measures.

    I have one person stationary cycling for 20 minutes, with a target rotation time. Now, i have taken two samples from this data, one consisting of...

    Started by medelza‎, 12-11-2013 05:20 AM
    • Replies: 0
    • Views: 668
    12-11-2013, 05:20 AM Go to last post
  60. Best analysis for intervention study & how to analyse mediating variables

    I need help to determine the best statistical analysis to run for a pre-test post-test intervention study. This is a 2 part question. I have...

    Started by Tanned Man‎, 12-09-2013 01:28 AM
    • Replies: 0
    • Views: 1,496
    12-09-2013, 01:28 AM Go to last post

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