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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: 32,204
    11-10-2005, 12:21 AM Go to last post
  1. 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: 4,170
    04-19-2013, 09:03 AM Go to last post
  2. Question Reverse Scoring

    Hi, I am a research student. I have a quesrion about reverse scoring. I would like to know if it is a requirement to reverse score an items in the...

    Started by 10girl‎, 07-26-2011 04:27 PM
    measurements, negativelly- worded items, questionnaires, reverse scoring, surveys
    • Replies: 1
    • Views: 5,981
    07-26-2011, 05:03 PM Go to last post
  3. Question Post Tests on a one-group pre-test/post-test research design

    I have conducted a survey as a pre-test. Is it okay for the post-test to be a semi-opened questionnaire regarding the same content. Will validity be...

    Started by 10girl‎, 07-26-2011 04:35 PM
    instruments, post test, questionnaire, survey, validity
    • Replies: 1
    • Views: 3,503
    07-26-2011, 05:06 PM Go to last post
  4. Question Variation of the one group pre-test/post-test research desgn

    Is it okay to break up the one group into two groups? I am doing research on character development. The age groups are Pre-K through Grade 2 and...

    Started by 10girl‎, 07-26-2011 04:41 PM
    character development, character education, intervention, post-test
    • Replies: 1
    • Views: 3,197
    08-04-2011, 04:51 PM Go to last post
  5. 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 10:02 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 26,307
    04-13-2013, 06:43 PM Go to last post
  6. Is the intragroup correlation to be used instead of or alongside power analysis?

    Hello, I am doing a literature review for my mental health nursing dissertation. It is on the effects of Mindfulness-based-cognitive-therapy...

    Started by 11jono11‎, 01-29-2011 09:24 AM
    3 Pages
    1 2 3
    • Replies: 31
    • Views: 10,624
    02-19-2011, 12:57 PM Go to last post
  7. Comparing group characteristics for difference/homogenity

    Hello all :wave:, I am performing a literature review examining the effects of Mindfulness based cognitive therapy on depression. I have one...

    Started by 11jono11‎, 02-19-2011 12:54 PM
    • Replies: 2
    • Views: 3,907
    02-20-2011, 07:37 AM Go to last post
  8. Randomized controlled trial guidelines?

    Sorry if this is to basic of a question. I am writing a literature review (dissertation). In my recommendations I have so far recommended that in...

    Started by 11jono11‎, 02-20-2011 07:46 AM
    • Replies: 4
    • Views: 5,968
    02-23-2011, 04:15 PM Go to last post
  9. Independent study

    Dear Statistics wizards, I have an independent study project coming up and I would just like to check that my stats are correct. Depending on...

    Started by 11jono11‎, 08-02-2012 08:58 PM
    • Replies: 4
    • Views: 2,149
    08-07-2012, 04:36 AM Go to last post
  10. URGENT DEADLINE. Multiple Dependent Variables. Which test? MANOVA? HELP V.APPRECIATED

    Hi All, I probably should have posted this sooner because I have a deadline this Wednesday but if anyone could help me out now, asap, that would...

    Started by 11jono11‎, 12-09-2012 11:05 PM
    • Replies: 4
    • Views: 3,067
    12-10-2012, 03:40 PM Go to last post
  11. 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: 1,899
    05-01-2013, 01:06 PM Go to last post
  12. Help with which spss test to use

    Can anybody please help me I am going out of my mind trying to figure out which spss test to use!, its for my dissertation, im in my final year of a...

    Started by 137‎, 02-07-2013 12:52 PM
    • Replies: 1
    • Views: 1,957
    02-08-2013, 04:00 AM Go to last post
  13. 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: 2,481
    04-13-2013, 11:31 AM Go to last post
  14. Moderated regression: Inconsistent results. Is it possible?

    I performed moderated multiple regression using SPSS. Total sample size was 800. My variables were as follows: - Outcome variable (Y: measured in...

    Started by 2345‎, 09-26-2013 01:47 AM
    • Replies: 1
    • Views: 1,276
    10-11-2013, 04:31 PM Go to last post
  15. Analysis of parental leave

    Hello, in my bachelor thesis i have to use regression analysis, i used a questionnaire to collect the data. Dependent variable is the time that...

    Started by 2be‎, 04-28-2017 04:00 PM
    adjusting data, dependent variable, quantification, regression analysis
    • Replies: 1
    • Views: 1,256
    04-28-2017, 04:17 PM Go to last post
  16. Longitudinal Analyses with questionnaire with varying items per wave

    Hi all, For my thesis I am conducting a longitudinal analyses (5 waves) on antisocial behavior measured with the ASBQ. Now I have a different...

    Started by 3353206‎, 03-14-2016 09:08 AM
    factor analyses, items, measurement invariance, mplus., questionnaire
    • Replies: 1
    • Views: 1,591
    03-20-2016, 01:18 PM Go to last post
  17. Analysing ranked answers


    Started by 50footwoman‎, 03-19-2013 07:47 AM
    help neded, psychology, ranks, statistics, telepathy
    • Replies: 0
    • Views: 1,286
    03-19-2013, 07:47 AM Go to last post
  18. Research Issue: Multi item scale/Confirmatory factor analysis

    We conducted a study on information elaboration in teams. After data sampling our supervisor instructed us to also examine the dependent variable...

    Started by 5254‎, 06-23-2013 07:08 AM
    • Replies: 2
    • Views: 1,428
    06-26-2013, 11:31 PM Go to last post
  19. How I can standardised scores of 2 scales for 2 gruops?

    Hi all, :wave: I'm so happy when I found ur link coz I have many questions about statistics staff. Actually I need to compare means between 2...

    Started by a student‎, 04-30-2011 07:02 PM
    • Replies: 1
    • Views: 2,069
    05-08-2011, 07:53 PM Go to last post
  20. Outliers question for repeated measures anova

    Hi, I just wanted some confirmation because I cannot seem to find a clear answer in any textbook yet. When running a repeated measures anova...

    Started by a.jerovich‎, 09-15-2014 12:10 AM
    • Replies: 0
    • Views: 1,887
    09-15-2014, 12:10 AM Go to last post
  21. 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: 4,383
    02-05-2014, 01:01 PM Go to last post
  22. 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: 5,795
    04-04-2013, 08:16 PM Go to last post
  23. Comparing three percentages (not means) which test [spss]

    Hello I wonder if you can help I am having trouble working out which statistical test to use. I have conducted a TMS study with four participants....

    Started by AbbyBradWest‎, 07-11-2015 06:46 AM
    • Replies: 0
    • Views: 1,156
    07-11-2015, 06:46 AM Go to last post
  24. Two way unrelated ANOVA

    Hi, I was wondering whether anybody could help me, i've ran the data in SPSS and can see I have found some significant findings. However I'm...

    Started by abcd123‎, 03-12-2014 04:23 PM
    • Replies: 0
    • Views: 1,898
    03-12-2014, 04:23 PM Go to last post
  25. Unhappy Regarding Bayesian Inference

    Hi, This is a problem I am currently facing in my research... I have a dataset collected over time for time=0 to T I need to estimate some...

    Started by abcd_1641‎, 01-27-2006 10:06 PM
    • Replies: 2
    • Views: 4,015
    01-30-2006, 12:23 AM Go to last post
  26. Hi

    Hi, Am facing a problem in analysis. Hope anyone can help. I have a two of words- one belongs to BB and another to LB. I have analyzed the...

    Started by ABI‎, 03-28-2014 12:19 AM
    • Replies: 0
    • Views: 1,258
    03-28-2014, 12:19 AM Go to last post
  27. non-linear regression problem

    Oops sorry I originally posted this in the homework help section: -------------------------------------------------------------------------------- ...

    Started by abiochemist‎, 01-03-2007 11:38 PM
    • Replies: 0
    • Views: 3,110
    01-03-2007, 11:38 PM Go to last post
  28. Question Power analysis and correlations (effect sizes)

    Hi everyone! Iím conducting a power analysis to determine the minimum sample size I will need to detect an effect size of 0.3 (i.e., a...

    Started by Abram Rickards‎, 07-08-2013 12:22 PM
    • Replies: 1
    • Views: 1,636
    07-10-2013, 09:46 AM Go to last post
  29. Exclamation Thesis Statistics - - Outcome Known, but want to categorize Participant responses

    Hi! I am beginning the process of determining which statistical tests to use for my thesis research involving high school dropouts and their...

    Started by abruno‎, 09-09-2013 05:32 PM
    • Replies: 8
    • Views: 1,853
    09-09-2013, 08:21 PM Go to last post
  30. mixed models (follow up to a 'noise affecting food taste and liking' study)

    Dear all, we are seeking advise on mixed models, to analyze an experiment looking at the effects of pleasant/unpleasant background noise on taste. ...

    Started by aca98atw‎, 01-04-2011 03:47 AM
    • Replies: 3
    • Views: 3,471
    01-04-2011, 04:04 PM Go to last post
  31. simulating psychology experiments, some questions :)

    Dear all, I hope you can point me in the right direction regarding two issues I am having with simulating experiments (1: regarding the legality...

    Started by aca98atw‎, 05-07-2012 11:50 AM
    • Replies: 1
    • Views: 2,219
    05-11-2012, 12:30 AM Go to last post
  32. Meta-analysis to compare 3 randomized control trials?

    I'm proposing to evaluate an outcome in three completed randomized controlled trials. The primary goal is to analyze a new outcome in each data set...

    Started by ACAD‎, 06-07-2016 11:15 PM
    manova, meta-analysis, randomized control trials
    • Replies: 0
    • Views: 1,389
    06-07-2016, 11:15 PM Go to last post
  33. Question Which statistical test should I use?

    Hello everyone, I am doing my undergraduate final year paper:) Participants would be divided into two groups (A & B) and I am going to measure...

    Started by acchan‎, 10-12-2010 06:05 AM
    • Replies: 8
    • Views: 4,961
    10-13-2010, 05:57 PM Go to last post
  34. Question About MANOVA (assumptions violated)

    Hi everyone, I am doing a research on demographical factors (e.g. family income, step family, gender etc.) and aggressiveness/delinquency of...

    Started by acchan‎, 09-22-2013 05:13 AM
    • Replies: 5
    • Views: 2,715
    09-24-2013, 02:43 AM Go to last post
  35. Chi Square help

    Hi. A friend of mine student in psychology did a small school research. Her issue was if the order of presenting choice alternatives influences the...

    Started by ace04‎, 06-11-2012 01:32 AM
    • Replies: 5
    • Views: 1,810
    06-13-2012, 04:26 AM Go to last post
  36. Question Meaning of "n" when analyzing data

    Hi all, I am a bit confused with "n" in the context of data analysis. Is "n" (1) the number of participants OR (2) the number of observations? ...

    Started by aceadimeins‎, 07-18-2013 06:00 PM
    • Replies: 4
    • Views: 2,008
    07-20-2013, 05:43 AM Go to last post
  37. repeated measures ANOVA with quadratic covariate??

    Hi, I have some data that I am struggling to analyse. Any advice would be much appreciated. My DV is a repeated measure with two levels (test...

    Started by achan‎, 03-24-2014 05:56 AM
    • Replies: 0
    • Views: 2,445
    03-24-2014, 05:56 AM Go to last post
  38. Regression Analysis

    Since Regression Analysis is all about using error analysis to forecast events via investigating the relationships between variables, I will want to...

    Started by acharls‎, 07-01-2008 07:14 PM
    • Replies: 2
    • Views: 3,492
    07-01-2008, 09:54 PM Go to last post
  39. Tracking Signal in Forecasting

    Hi Gentlemen and Ladies, I have this forecasting I am running and i came up with a calculative track signal (i.e. RSFE/MAD) of 4.2 and there was a...

    Started by acharls‎, 07-05-2008 09:37 AM
    • Replies: 0
    • Views: 5,926
    07-05-2008, 09:37 AM Go to last post
  40. Analysis of similarity estimate scores

    I find myself unable to select the correct statistical procedure to effectively analyse a set of data. I have data for 20 individuals and 20 item...

    Started by Acker‎, 05-25-2011 11:19 PM
    • Replies: 0
    • Views: 2,178
    05-25-2011, 11:19 PM Go to last post
  41. Help- Comparing means

    So my study wanted to see whether an intervention had an effect in reducing stigma. Participants were given a survey before the intervention. The...

    Started by acue‎, 06-10-2011 06:34 PM
    • Replies: 2
    • Views: 2,820
    06-13-2011, 02:37 AM Go to last post
  42. paired samples t-test vs. repeated measures (controlling for a variable) on SPSS?

    So my study wanted to see whether an intervention had an effect in reducing stigma. Participants were given a survey before the intervention. The...

    Started by acue‎, 06-09-2011 11:58 AM
    • Replies: 1
    • Views: 6,798
    06-09-2011, 12:05 PM Go to last post
  43. Computing sample size

    Hello, I would like to find a way to compute sample size for mediation and moderation multiple regression. I read some of David Kenney's work,...

    Started by acue‎, 02-25-2012 10:44 PM
    • Replies: 1
    • Views: 2,997
    02-26-2012, 05:41 PM Go to last post
  44. Calculating magnitude of indirect effect

    Is there a formula to calculate the magnitude of the indirect effect?

    Started by acue‎, 07-01-2012 10:53 AM
    • Replies: 1
    • Views: 2,113
    07-01-2012, 12:20 PM Go to last post
  45. Proposal of data analysis

    Proposal of data analysis Hello, I'm an undergrad student in my final year of an art sci degree. Iíve been given the assignment to come up with a...

    Started by Adam_J‎, 11-12-2006 07:41 PM
    • Replies: 0
    • Views: 4,286
    11-12-2006, 07:41 PM Go to last post
  46. Please help with my psychology dissertation

    Hi everyone, I'm a third year psychology student currently doing by dissertation and my knowledge of statistics is appalling at best. I was...

    Started by Adderz‎, 03-06-2013 02:58 PM
    • Replies: 2
    • Views: 3,612
    03-08-2013, 03:47 PM Go to last post
  47. Measuring Change over Time

    Hi! I am hoping I can get some input from social sciences folks. My stats committee member is not being very helpful and I am trying to wrap up my...

    Started by addie10‎, 06-12-2010 06:09 PM
    • Replies: 0
    • Views: 10,975
    06-12-2010, 06:09 PM Go to last post
  48. Help with Pre-Post Analyses (only 2 trials and no between subjects effects)

    I need some help for my thesis - am not getting much from my stats committee member. I am looking at change in scores across treatment on a...

    Started by addie10‎, 02-07-2012 10:32 PM
    cox regression, longitudinal design, pretest posttest, regression analysis
    • Replies: 2
    • Views: 2,203
    02-14-2012, 05:12 PM Go to last post
  49. 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: 1,339
    04-20-2013, 05:41 PM Go to last post
  50. Scoring & comparing independent Likert scales

    Hi all, I am a PhD student. I have recently completed a Post Graduate Diploma in Statistics but i'm very new to the actual use of statistic's in...

    Started by adkav‎, 02-25-2010 08:36 AM
    • Replies: 0
    • Views: 3,689
    02-25-2010, 08:36 AM Go to last post
  51. Unhappy Conflicting summary stats and MANOVA

    Hi, Ive gotten stuck with my stats for my degree project. I measured 8 morphological variables of 2 different species, about 800 specimens in all....

    Started by Adnil‎, 01-25-2008 05:24 AM
    • Replies: 1
    • Views: 4,316
    01-25-2008, 07:51 AM Go to last post
  52. Post Interpreting means from likert scale data

    Hello, I work for a government department in Australia. The department runs an annual opinion survey with 5 point likert scale response items....

    Started by Adrian Seabrook‎, 10-23-2005 08:13 PM
    • Replies: 4
    • Views: 71,616
    10-24-2005, 08:31 AM Go to last post
  53. Exclamation Urgent help needed for science research project

    Eek! I don't know anything at all about statistics.. I have a project where I am looking at the perception of closeness in adolescent romantic...

    Started by adrienne‎, 11-04-2007 10:11 AM
    • Replies: 1
    • Views: 2,326
    11-07-2007, 01:12 PM Go to last post
  54. Disagreement with my advisor about Cronbach's alpha for my thesis

    My psychology thesis is for an interdisciplinary degree, so I wasn't able to take any advanced methods before completing the research. I took two...

    Started by adtree74‎, 12-06-2015 03:30 PM
    • Replies: 2
    • Views: 1,439
    12-06-2015, 05:34 PM Go to last post
  55. effect size for McNemar's?

    Is it possible to calculate effect size for comparisons made using the McNemar's test? If so, how? I am at a total loss on this after spending A...

    Started by aeb767‎, 07-26-2012 11:28 AM
    effect size, mcnemar's, nonparametric
    • Replies: 0
    • Views: 3,267
    07-26-2012, 11:28 AM Go to last post
  56. Quick Cronbach's Alpha Question

    Hi all, This may seem like a silly question, but I was wondering if I should remove outliers prior to running reliability analysis or run the...

    Started by Aegislash‎, 02-27-2017 05:32 AM
    cronbach's alpha, outliers, reliability
    • Replies: 14
    • Views: 3,034
    03-03-2017, 02:16 AM Go to last post
  57. creating & analysing a rating scale

    Hi all I work for a charity and want to design an instrument to look at how our interventions are affecting our clients. I am really struggling...

    Started by aeliana‎, 04-11-2012 04:52 AM
    • Replies: 0
    • Views: 2,193
    04-11-2012, 04:52 AM Go to last post
  58. how do I test difference in variability?

    I have 5 students each count number of spores on 10 fern leaves (see table below - sorry about the alignment). I'm trying to find out if variability...

    Started by aer1984‎, 08-13-2009 03:26 PM
    • Replies: 1
    • Views: 9,196
    11-28-2009, 02:03 PM Go to last post
  59. Need help with test and continuous variable

    Hi, I'm running a research called The Effects of Video Games on Prosocial Behavior. I have a few questions about some things I just can't understand....

    Started by Aesthete‎, 08-11-2011 08:32 AM
    • Replies: 1
    • Views: 2,243
    08-15-2011, 07:13 PM Go to last post
  60. linear regression with covariates

    Hi What we have done; We have 105 crabs, with different widths and claw size, on which we have measured; the metabolism, sprint speed, endurance,...

    Started by afindsen‎, 02-10-2010 08:35 AM
    • Replies: 2
    • Views: 4,158
    02-10-2010, 05:12 PM Go to last post

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