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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: 28,745
    11-10-2005, 12:21 AM Go to last post
  1. My F Value equals zero

    I am using repeated measures analysis with the mixed procedure in SAS. Comparing two periods with about 11 subjects. I have a non-significant P...

    Started by sturgeon‎, 09-07-2006 12:31 PM
    • Replies: 1
    • Views: 15,257
    09-07-2006, 12:43 PM Go to last post
  2. right stat technique?

    Ind.Variable: A continuous variable Dep. Varible: B continuous variable I would like to know if there is a gender difference between boys and...

    Started by godfather‎, 09-06-2006 10:58 PM
    • Replies: 1
    • Views: 2,687
    09-06-2006, 11:21 PM Go to last post
  3. power analysis for logistic regression

    I am a dentist working on a PhD thesis and recently my coleagues and I submitted a paper that assesed the effect of baseline factors (tooth type,...

    Started by Ivana‎, 09-05-2006 09:37 AM
    • Replies: 1
    • Views: 7,185
    09-05-2006, 09:58 AM Go to last post
  4. Need help with MANOVA

    Hi there, I'm working on a research project testing the social control theory of delinquency set out by Hirschi (1969). I have two separate...

    Started by jess110483‎, 09-04-2006 08:14 AM
    • Replies: 6
    • Views: 3,298
    09-04-2006, 09:54 AM Go to last post
  5. Interaction studies using SPSS--urgent help needed

    Hi All, Not sure how many people out there know much about genetics and statistical analysis. I'm trying to submit my thesis and this person in...

    Started by ashi‎, 08-31-2006 12:02 PM
    • Replies: 1
    • Views: 2,631
    08-31-2006, 01:39 PM Go to last post
  6. need help with hypotheses adn appropriate stats

    I have some research questions but not sure which is the right stat to use. I will list the questions as I wrote them and then what I think I should...

    Started by godfather‎, 08-30-2006 11:36 PM
    • Replies: 1
    • Views: 2,266
    08-31-2006, 08:37 AM Go to last post
  7. I need help with data!!

    Hi! I am new to the board. I sure wish I had found this at the beginning of the summer....I am in the last week of my internship, and I need to...

    Started by juice‎, 08-28-2006 10:58 AM
    • Replies: 3
    • Views: 2,647
    08-29-2006, 09:33 PM Go to last post
  8. Talking Non-parametric tests, data not meeting assumptions

    Hello, Im at the stage where im banging my head against the wall!!!!:eek: Im testing the time of travel (in hours) taken for fish to cross a...

    Started by EllieChapman‎, 08-17-2006 05:35 AM
    • Replies: 3
    • Views: 4,384
    08-25-2006, 09:35 AM Go to last post
  9. Smile Converting from a 7- to a 5-point scale

    I would appreciate the community’s assistance. I work in a unit that evaluates many training activities. In the past we typically used a five-point...

    Started by Rich‎, 08-22-2006 02:57 PM
    • Replies: 1
    • Views: 9,850
    08-24-2006, 08:47 AM Go to last post
  10. Post-test for nonparametrics?

    Hi! I need some help regarding nonparametric tests doubts that are just *killing* me :(: 1) Is it mandatory to use nonparametric tests when I'm...

    Started by Zanello‎, 08-20-2006 07:25 PM
    • Replies: 2
    • Views: 9,545
    08-21-2006, 01:18 PM Go to last post
  11. Kurtosis and Skewness coefficents and ANOVA

    Hello, A friend of mine told me that despite my variable is not ditributed normally, I am allowed to do an ANOVA if both Kurtosis and Skewness...

    Started by Lolo‎, 08-16-2006 05:19 AM
    • Replies: 6
    • Views: 5,707
    08-18-2006, 04:52 AM Go to last post
  12. Central tendency measure for Broadband Speeds

    I have collected over 120 observations of broadband internet speeds achieved through my service provider. The values range from, 5 kilobits per sec....

    Started by br945‎, 08-14-2006 01:18 AM
    • Replies: 0
    • Views: 2,799
    08-14-2006, 01:18 AM Go to last post
  13. Measuring Change in Regression

    We are working on a study to examine the effectiveness of a safety training program. Before and after the training, participants were asked to...

    Started by garfield‎, 08-13-2006 09:29 PM
    • Replies: 0
    • Views: 2,769
    08-13-2006, 09:29 PM Go to last post
  14. some help please

    Hi all Can I get some help from you, I am a research student I developed questionnaire to get some information but after I get the results I am...

    Started by almohandes‎, 08-09-2006 05:51 AM
    • Replies: 0
    • Views: 1,900
    08-09-2006, 05:51 AM Go to last post
  15. Please help!

    Admittedly, I am not so good at stats, so forgive me if these seem like stupid questions. I am working on a Ph.D. in cell/molecular biology, studying...

    Started by LabGirl‎, 08-07-2006 11:19 AM
    • Replies: 2
    • Views: 2,164
    08-08-2006, 05:15 PM Go to last post
  16. Likert scale problem

    Hello, I am studying writing apprehension (WA) and have used Daly and Miller's (1975) Writing Apprehension Scale (WAS) -- a 5 point Likert scale...

    Started by Beto‎, 08-04-2006 02:36 PM
    • Replies: 0
    • Views: 3,456
    08-04-2006, 02:36 PM Go to last post
  17. Problem with linear regression

    Dear friends, Purpose of this Q: First of all, I am a non-mathematics/statistics student. I am doing Ph.D in botany. I have a set of data. On the...

    Started by pavnesh‎, 07-27-2006 05:59 AM
    • Replies: 1
    • Views: 2,678
    07-28-2006, 06:12 AM Go to last post
  18. Factor Analysis: standardizing components

    I hired a statistics guru to create a regression model to calculate sales quotas for our sales team based on historical sales data (DV) using several...

    Started by William1959‎, 07-21-2006 12:46 PM
    • Replies: 0
    • Views: 2,601
    07-21-2006, 12:46 PM Go to last post
  19. Strange pattern of the residual

    Hello, I am new to the forum. I got a residual from my multiple regression model as enclosed. Could you please tell me why the dots arrange in...

    Started by henry‎, 07-20-2006 05:04 PM
    • Replies: 0
    • Views: 2,508
    07-20-2006, 05:04 PM Go to last post
  20. non parametric statistics

    hello, I am a beginner,Need help pls Treatment structure: 2 supplements for pregnant dogs(treatment(trt) A and B) response variable is the number...

    Started by ron‎, 07-09-2006 09:32 PM
    • Replies: 0
    • Views: 2,088
    07-09-2006, 09:32 PM Go to last post
  21. contrasts

    Hi, again questions where nobody has an idea, (or don't want to answer?) I want to work with orthogonal contrasts, also called a priori...

    Started by hobglobin‎, 07-06-2006 11:58 AM
    • Replies: 0
    • Views: 3,558
    07-06-2006, 11:58 AM Go to last post
  22. Exclamation Help with intervals for dependent variables

    Hello, I am needing some quick help. I have searched and searched and can't find a solution. I have some dependent variables that are a number...

    Started by dmwilliams‎, 06-28-2006 12:31 PM
    • Replies: 4
    • Views: 2,840
    07-05-2006, 07:36 PM Go to last post
  23. non-parametric repeated measures effect sizes, help requested

    Hi, I'm a university student from NZ. I'm currently attempting to establish effect sizes for non-parametric repeated measure variables. ...

    Started by roo‎, 07-04-2006 12:28 AM
    • Replies: 0
    • Views: 4,049
    07-04-2006, 12:28 AM Go to last post
  24. appropriate nominal-by-nominal in small samples

    Hello, I was just reading your forum, and wondering if it is appropriate to do a chi-squared test with post-hoc if 44% of my cells have a count of...

    Started by Alex‎, 07-03-2006 03:35 PM
    • Replies: 0
    • Views: 3,130
    07-03-2006, 03:35 PM Go to last post
  25. Help solve a small controversy - research design help

    There's an interesting controversy in audiophile circles. I want to compare two groups of subjects. The object is to see if subjects can...

    Started by talkstats‎, 06-29-2006 10:30 AM
    • Replies: 2
    • Views: 2,658
    07-01-2006, 01:10 PM Go to last post
  26. Help with my Editing Test Survey

    Hello. I'm a PhD student in English, and I need some direction. I have taken a quant methods course but it appears I need a refresher. :) Let me...

    Started by EngPhDGuy‎, 06-30-2006 07:17 PM
    • Replies: 5
    • Views: 3,007
    07-01-2006, 12:56 PM Go to last post
  27. Statistical test: newbie needs help on data analysis

    Hi, I'm a newbie on data analysis and would like to have some advice on how to precede to analysis the following project. The study in concern is...

    Started by Beyon‎, 06-27-2006 05:28 AM
    • Replies: 1
    • Views: 2,868
    06-30-2006, 11:14 PM Go to last post
  28. Seasonal Index - Statistics(Forecasting)

    Here's the problem: The seasonal indices of the sales of garment of a particular type ina certain shop are given below, ----------Quarter...

    Started by electronic_pen‎, 06-28-2006 06:47 AM
    • Replies: 0
    • Views: 4,689
    06-28-2006, 06:47 AM Go to last post
  29. before and after survey

    I have the results of a survey (5 point likert scale) that has been done on a group of individuals before treatment and again after treatment. I am...

    Started by kowalsks‎, 05-30-2006 05:51 AM
    • Replies: 1
    • Views: 4,381
    06-26-2006, 03:09 PM Go to last post
  30. probit analysis

    Hi, I have dose-response data (measurements vs. dead/not-dead) from several different treatments. For them I performed probit analyses to get 50%...

    Started by hobglobin‎, 06-26-2006 08:15 AM
    • Replies: 0
    • Views: 3,491
    06-26-2006, 08:15 AM Go to last post
  31. Can one use both parametric and nonparametric tests?

    hi, I think this is where I should post this question. Sorry i am new. I was wondering if someone could tell me if i am on the right track. In my...

    Started by Joseph‎, 06-20-2006 05:37 AM
    • Replies: 2
    • Views: 6,840
    06-22-2006, 06:11 AM Go to last post
  32. ANOVA & Tukey

    Hi, I'm doing my research, studying on the effect of pH (acid-base) and ionic strength (IS, salt ions) on denaturation temperature (Td) of...

    Started by bom_bomkung‎, 06-13-2006 02:20 PM
    • Replies: 2
    • Views: 4,302
    06-19-2006, 02:43 PM Go to last post
  33. Questionnaire analysis

    I feel a bit strange posting here, but everything's worth a try! I am trying to analyse a questionnaire that I designed myself (sadly, my design was...

    Started by Soot‎, 06-13-2006 04:08 AM
    • Replies: 0
    • Views: 2,816
    06-13-2006, 04:08 AM Go to last post
  34. notation question

    I work with gifted elementary students and have received help from this forum before. We purchased a workbook that uses colons when representing...

    Started by kathy678‎, 06-04-2006 11:23 PM
    • Replies: 1
    • Views: 2,659
    06-07-2006, 10:13 AM Go to last post
  35. Question division problem

    Pourpose: I need the solution for a problem in my B. tech project. Hi all, I have 'n' numbers between 0 and 1 .... and there sum 'S' is known...

    Started by lunatic11‎, 06-05-2006 01:44 AM
    • Replies: 0
    • Views: 2,139
    06-05-2006, 01:44 AM Go to last post
  36. Likert data and regression

    What is the general consensus regarding using Likert data and OLS regression? I have data from a 4-point Likert scale that I'd like to use for a...

    Started by phd-cand‎, 05-26-2006 03:27 PM
    • Replies: 0
    • Views: 3,094
    05-26-2006, 03:27 PM Go to last post
  37. Unhappy Design Memory Experiment

    My experiment is on STM. I am using digit span and corsi blocks.The three conditions are no concurrent task articulatory suppression and concurrent...

    Started by nuala‎, 05-24-2006 06:18 AM
    • Replies: 0
    • Views: 3,022
    05-24-2006, 06:18 AM Go to last post
  38. Unhappy Proposal design-is a control necessary?

    I have to design a proposal in order to evaluate 'cross-racial' attitudes of young people who live in a high crime area,towards gun carrying. Can I...

    Started by Twin2‎, 05-16-2006 03:34 AM
    • Replies: 3
    • Views: 1,852
    05-22-2006, 08:41 AM Go to last post
  39. Question Outliers & z scores ???

    Hi, I am in the 2nd year of an MSc in Forensic Psych and am having a slight problem with the stats for my diss. My study is examining the effect...

    Started by katypie1‎, 05-14-2006 07:14 AM
    • Replies: 1
    • Views: 3,506
    05-14-2006, 09:40 AM Go to last post
  40. time series regression

    Hi, I've never done a time-series regression and was unable to turn up anything in a search. I'm looking at how vehicle sales affect average fuel...

    Started by zingbergeur‎, 05-04-2006 06:57 PM
    • Replies: 1
    • Views: 2,823
    05-04-2006, 07:07 PM Go to last post
  41. uneven group sizes

    If I want to compare the means of two groups but the group sizes are uneven (230 and 25) what is the best test to use? I am basically trying to...

    Started by kowalsks‎, 05-03-2006 09:48 AM
    • Replies: 4
    • Views: 15,598
    05-04-2006, 05:21 AM Go to last post
  42. Ryan's Q - posthoc

    Hi, has anybody experience with "Ryan's Q test" as a post-hoc test after ANOVA? It is recommended as parametric test for pairwise comparisons...

    Started by hobglobin‎, 05-03-2006 07:03 AM
    • Replies: 0
    • Views: 4,471
    05-03-2006, 07:03 AM Go to last post
  43. Comparing Distributions - Discrete vs Binned vs Continuous

    I have a number of different feature types, and I want to compare the distributions of the features measured under different conditions. Some...

    Started by Stormy‎, 05-02-2006 08:40 PM
    • Replies: 1
    • Views: 5,494
    05-02-2006, 08:50 PM Go to last post
  44. chi square

    Hello! Just a couple of questions about chi squares. Current situation: students have taken a surve that has a likert scale of 1-5 (with 1=...

    Started by kowalsks‎, 02-20-2006 06:49 AM
    • Replies: 9
    • Views: 4,703
    04-28-2006, 07:34 AM Go to last post
  45. Post design!

    Will anyone give me the link from where i kan get some details of new alpha designs.i want some details related to alpha designs. thanku

    Started by waqasemran‎, 04-23-2006 03:21 AM
    • Replies: 0
    • Views: 2,160
    04-23-2006, 03:21 AM Go to last post
  46. life table

    I'm doing my Masters in Population studies and this is my assignment question. Could any one of you explain how to solve this problem. I would be...

    Started by fathima‎, 04-16-2006 11:49 PM
    • Replies: 0
    • Views: 2,488
    04-16-2006, 11:49 PM Go to last post
  47. Interpreting interaction terms in multiple regression

    Hi everybody, I'm a master's student who's working on the last analysis for my thesis project. I'm studying possible predictors of satisfaction in...

    Started by K Wilson‎, 04-14-2006 02:47 PM
    • Replies: 1
    • Views: 46,644
    04-14-2006, 10:10 PM Go to last post
  48. Post Exploratory research and Analysis of Responses

    Hi everyone , I am conducting a research in linguistics trying to explore what goes in students ' minds when they read. My sample consists of 150...

    Started by Derfo‎, 04-10-2006 05:00 AM
    • Replies: 1
    • Views: 3,034
    04-10-2006, 07:52 AM Go to last post
  49. Compustat

    Does anyone have compustat industrial annual file which is already in spss sav format, like here http://fmwww.bc.edu/DR/D4.html but I do not have...

    Started by tommy‎, 04-08-2006 06:24 AM
    • Replies: 0
    • Views: 2,200
    04-08-2006, 06:24 AM Go to last post
  50. T-Tests- Which Mean Do I use?

    Ok, I have a group of about 320 students. I am particularly interested in 5 of them that form a group with a characteristic I'm interested in. I...

    Started by kowalsks‎, 04-04-2006 06:08 AM
    • Replies: 3
    • Views: 2,161
    04-06-2006, 04:14 AM Go to last post
  51. Which test appropriate for 2x2 linguistics experiment?

    Hi, I need to analyze a linguistics experiment we did. It was a 2x2 mixed design (one factor: word order, second factor: stress placement). 32...

    Started by slyly‎, 04-03-2006 10:37 AM
    • Replies: 0
    • Views: 2,378
    04-03-2006, 10:37 AM Go to last post
  52. Unhappy Normal Probability Plots to Validate Confidence Interval Results

    I found a 95% t-based confidence interval for a true population mean. The confidence interval was 22.28-24.87, and the true population mean was...

    Started by lilkatez21‎, 04-03-2006 01:03 AM
    • Replies: 0
    • Views: 2,943
    04-03-2006, 01:03 AM Go to last post
  53. Margin of Error help

    I am so stuck here, can you please review and tell me where I went wrong? Annual starting salaries for college graduates with business ...

    Started by shelld‎, 03-31-2006 04:00 PM
    • Replies: 0
    • Views: 2,963
    03-31-2006, 04:00 PM Go to last post
  54. Joint reference prior for normal distribution

    Hello, hoping for some help understanding Bayesian reference priors. This is the first time I have had to resort to Bayesian methods so please be...

    Started by russell‎, 03-27-2006 09:35 PM
    • Replies: 0
    • Views: 3,437
    03-27-2006, 09:35 PM Go to last post
  55. Dunnett's Test and Degrees of Freedom

    Can someone clue me in as to how degrees of freedom are calculated for Dunnett's test for multiple comparisons? We have a data set with 5 groups (1...

    Started by jcoleman51‎, 03-15-2006 08:51 AM
    • Replies: 4
    • Views: 7,528
    03-27-2006, 01:35 PM Go to last post
  56. Appropriate EC50 Stats?

    Hello again: I’m working with some data from an activated sludge respiration inhibition test. We have 6 dose concentrations and a control, all...

    Started by jcoleman51‎, 03-27-2006 12:00 PM
    • Replies: 0
    • Views: 3,633
    03-27-2006, 12:00 PM Go to last post
  57. Can I assume Normal Distribution?

    I am comparing 5(groups) experimental data sets with one Control Group. I am trying to determine which Experimental group is better than the Control...

    Started by jscholen‎, 03-22-2006 11:47 AM
    • Replies: 1
    • Views: 9,632
    03-23-2006, 09:52 AM Go to last post
  58. JohnM: Likert analysis help

    Hi, I was hoping you could give me some guidance on 5 point Likert-type scale analysis. I've read all the threads about it but none fully address...

    Started by Matt Peacock‎, 03-22-2006 02:01 PM
    • Replies: 0
    • Views: 2,717
    03-22-2006, 02:01 PM Go to last post
  59. Question Measuring Success of Treatment

    Hi, I have a fairly basic statistics background so please be patient. I set up an experiment where I have four groups of customers (randomly...

    Started by jman‎, 03-20-2006 07:19 PM
    • Replies: 0
    • Views: 2,294
    03-20-2006, 07:19 PM Go to last post
  60. Red face assumptions

    I've collected data from school children in year 7 (11-12yrs) and year 9 (13-14yrs). I want to see if there is a significant difference in physical...

    Started by angrykid‎, 03-15-2006 09:44 AM
    • Replies: 1
    • Views: 2,301
    03-16-2006, 08:16 AM Go to last post

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