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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: 22,541
    11-09-2005, 11:21 PM Go to last post
  1. Conducted Experiment, Need Help Deciding Which T test to run, how to execute it.

    I'm in an introductory research class at my college and have ran a basic experiment testing for word recall ability when using gender associated...

    Started by Josh1232‎, 05-05-2013 05:26 PM
    • Replies: 1
    • Views: 777
    05-06-2013, 01:52 AM Go to last post
  2. Proposed Research Design

    I am a proposing a research topic and want to see if what I propose is possible given the data I have. If not, I would like to hear your ideas on how...

    Started by DaNegotiator‎, 05-05-2013 05:04 PM
    • Replies: 0
    • Views: 609
    05-05-2013, 05:04 PM Go to last post
  3. Experiment design and analysis for e-commerce

    Hi i'm new to the forum and hopefully somebody wants to offer me a bit of advice. I'm carrying out a marketing choice experiment to estimate the...

    Started by defected‎, 04-27-2013 12:56 PM
    anova, binary logit, experiment analysis, experiment design
    • Replies: 1
    • Views: 785
    05-05-2013, 03:43 PM Go to last post
  4. what kind of sampling to use and in what measurefor the research to be valid?

    Hello, I have a difficulty with my doctoral research. I have to measure risk factors for antisocial behaviors at the group age 13-17 years old...

    Started by juljana‎, 05-03-2013 05:43 PM
    • Replies: 0
    • Views: 694
    05-03-2013, 05:43 PM Go to last post
  5. Post Can someone confirm I have done this correct please

    I have written my psychology results section for my dissertation, I have done a Spearmans rho and a Mann-Whitney to test my hypotheses. I would...

    Started by 137‎, 04-30-2013 06:37 PM
    • Replies: 7
    • Views: 1,040
    05-01-2013, 01:06 PM Go to last post
  6. Help about which test to use please?

    Hi everyone, I'm probably being a bit of a dunce but I can't for the life of me come to a conclusion of which statistical test to use for this...

    Started by Bobbydavro‎, 04-25-2013 05:22 AM
    • Replies: 5
    • Views: 978
    05-01-2013, 08:46 AM Go to last post
  7. Calculating the average variance of several normal distributed variables

    Hi, I have the following problem. I'm trying to average several normal distributed variables. To make it more easy, I'm using z-scores. The...

    Started by fraatsr‎, 05-01-2013 06:51 AM
    average, normal distribution
    • Replies: 0
    • Views: 524
    05-01-2013, 06:51 AM Go to last post
  8. statistically hopeless :(

    I have a lot of trouble when it comes to statistics, i go to all my classes and lectures but i just can't seem to get my head around it :( i...

    Started by statisticsdud‎, 04-30-2013 12:48 AM
    • Replies: 8
    • Views: 1,089
    04-30-2013, 05:20 PM Go to last post
  9. Can I even do this?

    I have a complex design: Groups(2) x Repeated Measures(2) = Dependent scores (2). I want to measure effect of groups(treatment). I can use ANOVA...

    Started by thepts‎, 04-29-2013 01:40 AM
    • Replies: 6
    • Views: 973
    04-30-2013, 02:35 AM Go to last post
  10. Is it possible to use ANOVA with a Likert Scale questionnaire?

    I am currently writing my dissertation and the deadline is getting close. I am really struggling with how to analyse my data - I had planned to do a...

    Started by Rose175‎, 04-28-2013 11:01 AM
    anova, dissertation, one way anova, psychology, spss
    • Replies: 5
    • Views: 23,308
    04-28-2013, 11:16 PM Go to last post
  11. Kruskall Wallis Test with unequal sample ratio

    Hello everyone! Your help will be GREATLY appreciated!!! :tup: I have looked at the effects of perceived social status (working, middle, upper...

    Started by Taote‎, 04-27-2013 02:51 PM
    • Replies: 0
    • Views: 736
    04-27-2013, 02:51 PM Go to last post
  12. Fishing for significance

    1) 2-level variable: I have a 2-level variable "Diagnosis" which represents a continous score (1=below, 2=above a "diagnosis" treshold). I want to...

    Started by thepts‎, 04-27-2013 03:59 AM
    • Replies: 2
    • Views: 1,103
    04-27-2013, 04:16 AM Go to last post
  13. Trouble understanding repeated-measures results

    I'm not sure if it's because I have done something wrong, but firstly my mauchly's sphericity test has a df of 0 and a sig of just ( . ), but than i...

    Started by halona‎, 04-26-2013 08:44 PM
    • Replies: 0
    • Views: 541
    04-26-2013, 08:44 PM Go to last post
  14. Question Help needed with 5 x 9 design statistics

    Hello friends! Currently a final-year student, I've collected data for my dissertation project. I've carried out a pilot study with only two...

    Started by orvokki‎, 04-26-2013 10:02 AM
    • Replies: 0
    • Views: 492
    04-26-2013, 10:02 AM Go to last post
  15. Mann-Whitney/ Kruskall Wallis Test PLEASE HELP

    Hello everyone. I hope somebody can help. Responses will be greatly appreciated! Description of Experiment: I have asked participants to fill...

    Started by Taote‎, 04-25-2013 06:23 PM
    • Replies: 3
    • Views: 1,559
    04-26-2013, 07:50 AM Go to last post
  16. Interpreting an interaction in ANCOVA

    Hi, I'm comparing two patient groups on a novel language measure (lets call it L1, linear variable). The groups did not differ on a more...

    Started by Fezz‎, 04-26-2013 04:49 AM
    • Replies: 0
    • Views: 2,540
    04-26-2013, 04:49 AM Go to last post
  17. Help with which ANOVA to use

    The study we are doing is examining the effect of positive and negative feedback on confidence. We're using a between-groups design with three...

    Started by Zimmer24‎, 04-25-2013 08:33 PM
    • Replies: 1
    • Views: 574
    04-26-2013, 03:15 AM Go to last post
  18. Suppression?

    Hello, In my model, I am looking at predictors of a variable, Y. In a path model, Y has 4 significant predictors lets call them A,B, C, and X (path...

    Started by SLLancaster‎, 04-25-2013 04:34 PM
    • Replies: 0
    • Views: 688
    04-25-2013, 04:34 PM Go to last post
  19. Lightbulb NLSY79 Help - Longitudinal data in STATA

    Hey, guys. I'm trying to use the National Longitudinal Survey Year 1979 data set in a multiple regression model. The data set has data from...

    Started by chickensandllamas‎, 04-24-2013 04:12 PM
    • Replies: 0
    • Views: 904
    04-24-2013, 04:12 PM Go to last post
  20. Regression Analysis with Dichotomous and Continuous Independent Variable .

    Hello everyone! Your help is greatly appreciated. I have run a 3 x 2 factor between-participants ANOVA in SPSS, but my analysis yielded no...

    Started by David88‎, 04-22-2013 02:54 PM
    • Replies: 2
    • Views: 2,237
    04-24-2013, 07:14 AM Go to last post
  21. Multilevel time series versus time series ARIMA models etc. Need help!!

    Hi guys, Does someone knows the difference between multilevel time series analysis and the time serie ARIMA models etc.; or is it approximately...

    Started by emmab1990‎, 04-23-2013 05:25 PM
    • Replies: 3
    • Views: 1,525
    04-24-2013, 01:41 AM Go to last post
  22. Exclamation Requesting Help with Dissertation

    Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

    Started by orvokki‎, 04-23-2013 04:12 AM
    • Replies: 0
    • Views: 520
    04-23-2013, 04:12 AM Go to last post
  23. SPSS - Independent t-test (Desperate for help!)

    I am currently trying to complete my results section for my dissertation, I am looking at gender differences in attitudes towards domestic abuse. I...

    Started by Becca91‎, 04-16-2013 05:20 AM
    • Replies: 3
    • Views: 699
    04-23-2013, 12:59 AM Go to last post
  24. Face validity VS Content Validity

    Dear respected members, I'm developing an instrument to measure care dependency in home dwelling elderly. I want to test the validity of the...

    Started by febriana_zz‎, 04-21-2013 01:17 AM
    content validity, face validity, interpretability
    • Replies: 0
    • Views: 1,685
    04-21-2013, 01:17 AM Go to last post
  25. Missing Data

    Hi :wave:, I have a database that I am using data imputation techniques, but is not a normal matrix to apply a multivariate normal test, my question...

    Started by adejota‎, 04-20-2013 05:41 PM
    little's, missing data analysis, missing data imputation
    • Replies: 0
    • Views: 727
    04-20-2013, 05:41 PM Go to last post
  26. mean or median for reaction times?

    Hi all, I have two groups who made a simple detection task in which reaction times was the only dependent variable (observed in different...

    Started by .elena.‎, 04-19-2013 04:04 AM
    • Replies: 2
    • Views: 2,233
    04-19-2013, 09:03 AM Go to last post
  27. finding the effect of X on the relationship between Y and Z

    I had a huge explanation and it got deleted, so here's a briefer version: I'm trying to find whether high trait empathy predicts a greater effect...

    Started by cairoan‎, 04-18-2013 07:00 PM
    correlation, problem, regression, science
    • Replies: 0
    • Views: 709
    04-18-2013, 07:00 PM Go to last post
  28. Research methods - Comparing high and low risk sports

    I am currently conducting a piece of research that aims to find if there is a difference between personality traits between participants of high and...

    Started by dannydoy‎, 04-18-2013 12:37 PM
    • Replies: 2
    • Views: 689
    04-18-2013, 12:59 PM Go to last post
  29. Help with which type of ANOVA to use?!

    Hello, I'm trying to figure out which type of ANOVA I'd use in this situation. My question involves 3 different groups with measurements taken at...

    Started by amycardinal‎, 04-13-2013 07:49 PM
    anova, help needed, repeated measures
    • Replies: 2
    • Views: 726
    04-18-2013, 11:51 AM Go to last post
  30. How do you report Effect sizes for ANCOVA?

    For ANOVA effect sizes you report n2 (in the correct format) but what do you do for effect sizes of ANCOVA? is it n2, r or r2??? Please HELP!

    Started by emmaPex‎, 04-18-2013 09:11 AM
    • Replies: 1
    • Views: 1,283
    04-18-2013, 09:22 AM Go to last post
  31. What should I do with this data?

    Hello, I am a work psychologist and have been asked to evaluate some data as part of my job. I rarely get the opportunity to do something like...

    Started by Psychobabblist‎, 04-17-2013 12:21 PM
    • Replies: 1
    • Views: 651
    04-18-2013, 02:33 AM Go to last post
  32. Awful Design - how to handle it ?

    Dear all, I have data from an experiment with what I think is an awful design. I need to type it into Excel (or directly into a statistical...

    Started by Yankel‎, 04-15-2013 06:59 AM
    • Replies: 8
    • Views: 973
    04-17-2013, 12:18 AM Go to last post
  33. combining two scales with different number of items into one measurement

    Hi, I have two different scales that measure children's' exposure to family violence. One is based on children's report on a single item, the other...

    Started by shiradvir‎, 04-16-2013 05:38 AM
    • Replies: 5
    • Views: 1,765
    04-16-2013, 08:45 AM Go to last post
  34. Maximum Likelihood Estimation, Ordered Logit

    Just a quick question, which might or might not be interesting. If attempting to estimate paramaters of a multinominal logit model by maximum...

    Started by tahslacks‎, 04-16-2013 05:20 AM
    • Replies: 0
    • Views: 750
    04-16-2013, 05:20 AM Go to last post
  35. Exclamation Multiple Linear Regression

    Hi all, Any help on this question would mean the absolute world to me. I have been in the emergency room with my boyfriend for the past 56 hours...

    Started by woodenspoon‎, 04-15-2013 03:40 AM
    • Replies: 3
    • Views: 1,167
    04-15-2013, 06:57 AM Go to last post
  36. Relative size of a p-value for a second hypothesis, compared to the first.

    Hi all, I apologise in advance if this is a very easy question - I may be struggling with the wording, or I might just be a bit slow. The...

    Started by hopeless.at.statistics‎, 04-14-2013 12:43 AM
    correlation, hypothesis test, relative size
    • Replies: 0
    • Views: 811
    04-14-2013, 12:43 AM Go to last post
  37. Likert scale, parametric or nonparametric?

    Hello, first post here. I apologize if it is a stupid question (but then again, that'll make it easier to answer:)) I am training to be a...

    Started by 11jono11‎, 12-11-2010 09:02 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 17,097
    04-13-2013, 06:43 PM Go to last post
  38. to use parametric or non-parapetric

    Hi Everyone, If anybody could help or offer any suggestions I would be extremely grateful for my Thesis I am looking at the relationship between...

    Started by 182BECKY‎, 04-13-2013 11:31 AM
    • Replies: 0
    • Views: 651
    04-13-2013, 11:31 AM Go to last post
  39. Non-parametric Chi-square test outputs *different* when order is reversed?

    Hello, I am a physics graduate student and am conducting research on physics learning and teaching. I surveyed n=63 students Likert scale 1 to 4...

    Started by snowfalcon_cu‎, 04-11-2013 08:57 AM
    chi-square, non-parametric test, spss
    • Replies: 5
    • Views: 956
    04-12-2013, 05:20 AM Go to last post
  40. non-parametric ANCOVA?

    Dear all, I would appreciate any help on a much debated issue of non-parametric ANCOVA. I compare 2 gourps (group is a factor, categorical), y...

    Started by akh‎, 04-11-2013 06:17 AM
    ancova, non-parametric
    • Replies: 7
    • Views: 4,593
    04-11-2013, 01:11 PM Go to last post
  41. non-parametric equivalence /non-inferiority test for ratio variable?

    Good day , I'm comparing subjects' success rates in two conditions A and B. All subjects run both conditions, so the data is paired. Each subject...

    Started by akh‎, 04-11-2013 06:01 AM
    equivalence testing, non-inferior, non-parametric, ratio
    • Replies: 0
    • Views: 1,027
    04-11-2013, 06:01 AM Go to last post
  42. Confidence intervals. Correct interpretation?

    Hi there, I am hoping someone can let me know if I have made the correct inferences regarding confidence intervals on a Pearson correlation...

    Started by Maybel‎, 04-08-2013 09:52 PM
    • Replies: 2
    • Views: 1,410
    04-09-2013, 07:58 PM Go to last post
  43. Chi-square help

    hey guys I need help! I need to make a background research on a chi-square test of independence and I'm having trouble getting the two nominal...

    Started by randya456‎, 04-09-2013 07:45 AM
    • Replies: 1
    • Views: 709
    04-09-2013, 08:04 AM Go to last post
  44. Help needed with 3 condition mixed design stats (ANOVA / T-TEST?)

    Hi, I have conducted an experiment on short-term media violence using a GSR machine (measures physiological response) and questionnaire. The aim...

    Started by Psychostats‎, 04-06-2013 08:38 AM
    • Replies: 6
    • Views: 1,115
    04-09-2013, 04:59 AM Go to last post
  45. 4 X 2 Chi Square with small n

    I'm trying to run a chi-square looking at ethnicity (4) across group (3). Some of my cells have less than n = 5. I've been unable to locate any...

    Started by evrobinson‎, 03-29-2013 10:10 PM
    • Replies: 3
    • Views: 1,061
    04-08-2013, 08:16 AM Go to last post
  46. Question Need help for ANOVA test !!

    Hi guys ! Hope everyone is all good ! My question: I conducted a mixed design ANOVA for my experiment. My SD/Mean and interaction graph...

    Started by psychtalk‎, 04-06-2013 07:40 AM
    • Replies: 1
    • Views: 582
    04-08-2013, 08:14 AM Go to last post
  47. Help with hypothesis

    I came across this forum when searching for help with my homework. I have to write a simple correlation hypothesis and a mediation hypothesis. I...

    Started by Agape000‎, 04-06-2013 09:55 PM
    • Replies: 0
    • Views: 669
    04-06-2013, 09:55 PM Go to last post
  48. Interpretation of Monte Carlo Significance for Chi-Square Analysis

    I am currently utilizing a 4x7 chi-square and cannot collapse any columns or rows, resulting in expected cell counts of less than 5 in 14 cells...

    Started by Psychology.Christine‎, 04-05-2013 09:33 PM
    chi-square, exact tests, interpretation, monte carlo
    • Replies: 0
    • Views: 1,362
    04-05-2013, 09:33 PM Go to last post
  49. Testing for homogeneity of variance for a LARGE sample

    I am wondering if someone can help me determine if I have met the assumption of homogeneity of variance within a sample size of 5,000. I have read...

    Started by PikeyJM‎, 04-04-2013 05:37 PM
    • Replies: 1
    • Views: 1,344
    04-05-2013, 09:33 AM Go to last post
  50. multiple mediators and multiple dvs - different results AMOS and MEDIATE (Hayes)

    I have a path model (longitudinal data): 1 independent variable (iv), 4 potential mediators (ms), 4 dependent variables (dvs); I compared models (chi...

    Started by AnneBaeuerle‎, 04-05-2013 08:33 AM
    amos, mediate macro, mediation
    • Replies: 0
    • Views: 1,525
    04-05-2013, 08:33 AM Go to last post
  51. Question is there a Fisher's exact test (or similar) for continuous data?

    I have a simple statistical problem, but am having a hard time identifying a good solution. I am interested in testing to see if an independent...

    Started by abaugh‎, 04-02-2013 05:13 PM
    continuous dv, fisher's exact test
    • Replies: 3
    • Views: 3,043
    04-04-2013, 08:16 PM Go to last post
  52. Comparing results presented as percents. Best method

    Hi folks, I was wondering if you could help me wrap my head around the best way to present some data and the best statistical test to use to...

    Started by Midsummer333‎, 04-03-2013 06:43 PM
    comparisons, hypothesis testing, percentages, psychology
    • Replies: 1
    • Views: 675
    04-04-2013, 07:37 AM Go to last post
  53. Number of Human Subjects

    I'm a high school student, state science fair is coming up, and I've got to make my project the best it can be. Why isn't it already the best it can...

    Started by Sora57‎, 04-03-2013 10:41 PM
    • Replies: 1
    • Views: 697
    04-04-2013, 05:27 AM Go to last post
  54. Utilizing Individual Data Points in an ANOVA, Reliability, Replication

    Hi all. Suppose you are conducting a study with n=10 subjects. Each subject runs through a behavioural experiment for treatment A and treatment...

    Started by jeffbruce‎, 03-28-2013 12:14 PM
    anova, average, reliability, replication
    • Replies: 1
    • Views: 672
    04-03-2013, 08:30 PM Go to last post
  55. Beyond a t-test repeated measures to evaluate scales scores after reeducation ?

    Hi, i'd like to have your advice about statistics methods to apply in my resaerch. I have seven subjects who have been evaluated twice...

    Started by telepro‎, 04-03-2013 07:06 AM
    • Replies: 0
    • Views: 581
    04-03-2013, 07:06 AM Go to last post
  56. How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs?

    How do I analyze a study with 2 IVS (2 levels per IV) and multiple DVs? IVS: I manipulated race of a job candidate (black or white) as well as the...

    Started by norajones‎, 04-03-2013 12:22 AM
    • Replies: 0
    • Views: 896
    04-03-2013, 12:22 AM Go to last post
  57. Question Requesting Help with Dissertation

    Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

    Started by orvokki‎, 03-28-2013 02:58 AM
    • Replies: 1
    • Views: 614
    04-01-2013, 05:32 PM Go to last post
  58. Mixed Model ANOVA Error terms

    Can someone show me, or point me to a resource, that would show how to compute the resulting Error sums of squares that would be produced in a...

    Started by DrJBN‎, 03-27-2013 11:37 AM
    anova, error terms, mixed
    • Replies: 3
    • Views: 964
    04-01-2013, 11:48 AM Go to last post
  59. P values, correlation analysis and sample size.

    Hi all, A question regarding the relationship between p values, correlation analysis and sample size... If I obtain a p = .036 for a...

    Started by Jasmine‎, 03-23-2012 06:42 AM
    • Replies: 8
    • Views: 20,498
    03-31-2013, 09:55 PM Go to last post
  60. By subjects versus by items - Also: Bots rule

    hi, I am doing some stats work at the moment and I have run mixed ANOVA's for both subject and item analysis, but they have come up showing...

    Started by resresd‎, 03-31-2013 10:44 AM
    • Replies: 3
    • Views: 732
    03-31-2013, 05:23 PM Go to last post

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