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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: 18,226
    11-09-2005, 11:21 PM Go to last post
  1. Narcissism in organizations

    For my thesis I have to describe (not execute) a research plan. 374 Employees of a certain company need to fill in a survey, which consist of two...

    Started by milano‎, 05-04-2016 06:43 PM
    • Replies: 0
    • Views: 82
    05-04-2016, 06:43 PM Go to last post
  2. Pearson's Partial Correlation - Transforming one non-normally distributed variable

    Hi all, I would be really grateful if someone could advise me on an issue I am having. I am carrying out research looking at the relationship...

    Started by DeirdreTwomey‎, 05-02-2016 10:00 AM
    log10, normality issue, normality transformations
    • Replies: 1
    • Views: 138
    05-02-2016, 11:10 AM Go to last post
  3. Meaningful Variables

    Some background: I am an early childhood educator taking my very first statistics course. We are in week three and I am already lost. We are...

    Started by amhcmh‎, 04-26-2014 11:12 AM
    • Replies: 5
    • Views: 4,278
    04-29-2016, 04:05 PM Go to last post
  4. Having trouble trying to decided which statistical analysis to use.

    I'm writing a paper about Birth Order and Big 5 Personality test. I have Birth order in one column separated as 1= first borns and 2= laterborns....

    Started by daisyresend‎, 04-26-2016 08:29 PM
    psychology report, spss 22, statistics help
    • Replies: 2
    • Views: 166
    04-29-2016, 07:25 AM Go to last post
  5. Likert scale analysis - ordinal or interval??

    Hi, I would appreciate some help so much as I feel I am going round in circles with every journal article I read! So I am currently trying to...

    Started by indie92‎, 04-21-2016 01:35 PM
    2 Pages
    1 2
    lickert, t-test
    • Replies: 26
    • Views: 595
    04-26-2016, 06:31 PM Go to last post
  6. Age as covariate?

    Hi all, I’ve been struggling with this problem for a while now. The answer is probably pretty straightforward, but I’m not sure what to do...

    Started by Bee.‎, 04-22-2016 05:07 AM
    • Replies: 5
    • Views: 214
    04-25-2016, 04:00 AM Go to last post
  7. What analysis for within measures on ordinal scale?

    Hi All, I have test scores on an ordinal scale (1-5). All participants took the test twice, but with different time intervals. I want to see if...

    Started by Sam31‎, 04-24-2016 10:01 AM
    • Replies: 0
    • Views: 109
    04-24-2016, 10:01 AM Go to last post
  8. Decomposing a mixed model custom ANCOVA

    Here is my scenario. The first paragraph tells a bit about the methods we used to give you a frame of reference. The second tells about the first...

    Started by dynamite‎, 04-22-2016 03:35 PM
    covariate, personality, psychology, repeated ancova
    • Replies: 0
    • Views: 137
    04-22-2016, 03:35 PM Go to last post
  9. How to handle missing data?

    Hi, I just finished an online study in which participants filled out several questionnaires at baseline and after 6 weeks (posttest). There were...

    Started by EvaDJ‎, 04-22-2016 07:59 AM
    dropout, missing data, multiple imputation, rct
    • Replies: 5
    • Views: 180
    04-22-2016, 03:20 PM Go to last post
  10. Which analysis for incomplete block design with repeated measure?

    I have a question on analyzing data from an incomplete block design. Participants have been randomly assigned to 1 out of 8 procedures each...

    Started by Noppa‎, 04-22-2016 04:23 AM
    anova, incomlete block design, repeated measures design
    • Replies: 0
    • Views: 76
    04-22-2016, 04:23 AM Go to last post
  11. What statistical test

    I need help in knowing what statistical test I should use for this problem in SPSS. The choices are One instructor who taught Advanced...

    Started by klm225‎, 04-19-2016 06:08 PM
    • Replies: 2
    • Views: 220
    04-19-2016, 08:19 PM Go to last post
  12. How often is the null hypothesis true in psychology?

    Hullo all, Something that I'm really interested in is the question of what should be the "default" form of statistical analysis used by everyday...

    Started by CowboyBear‎, 04-17-2016 12:08 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 475
    04-19-2016, 03:23 PM Go to last post
  13. Paired samples t-test for an interaction

    Hi all, I'm currently writing up my final project for university. The general idea is testing the role of language on emotion perception in...

    Started by sm4l‎, 04-19-2016 07:22 AM
    anova, psychology, spss, t-test
    • Replies: 0
    • Views: 105
    04-19-2016, 07:22 AM Go to last post
  14. How to understand these (discrepant?) findings?

    Hi everyone, I'm doing a project where I'm developing/validating a new questionnaire about body image (BodyImageNEW). I'm comparing it to an...

    Started by DefenceDoom‎, 04-18-2016 07:21 PM
    dfa, findings, hml
    • Replies: 1
    • Views: 123
    04-19-2016, 02:37 AM Go to last post
  15. Which test should I use for this unusual type of data obtained from a diary study?

    Hi, any help on my issue would be greatly appreciated :) I am having real trouble analysing the data for my Psychology dissertation. I am...

    Started by charliespin1‎, 04-16-2016 09:11 PM
    • Replies: 8
    • Views: 266
    04-17-2016, 03:42 PM Go to last post
  16. Multiple regression- model non-significant, but a significant predictor?

    Hi, I'm currently analyzing the results for my final year dissertation. For one of my multiple regressions, the overall regression model is...

    Started by twinpeaks‎, 04-16-2016 10:03 AM
    • Replies: 5
    • Views: 193
    04-17-2016, 02:45 AM Go to last post
  17. A 6th response option ("I don't know") added to a 5-point Likert scale. Is data lost?

    Hello, everyone, I need a little bit of help salvaging the data from a questionnaire. One of my colleagues applied a questionnaire, but...

    Started by streamline55‎, 04-12-2016 02:09 AM
    convert, imputation, likert, transform
    • Replies: 9
    • Views: 338
    04-15-2016, 12:54 PM Go to last post
  18. Am I understanding/describing this right? (chi sq, confidence intervals, ACE model)

    The experiment is a twin study - using pairs of twins to investigate similarities and differences and look at how much genes and environment...

    Started by emmaburge‎, 04-14-2016 08:58 AM
    ace model, chi square, confidence interval
    • Replies: 0
    • Views: 112
    04-14-2016, 08:58 AM Go to last post
  19. Separating a predictor variable using median split vs..

    ... standard deviations from the mean. Hi, I'd just like some clarification on something concerning the analysis for my research project. In...

    Started by twinpeaks‎, 04-10-2016 09:32 AM
    • Replies: 1
    • Views: 211
    04-12-2016, 01:43 AM Go to last post
  20. Question Help needed choosing statistical test

    Hi, I'm new to this forum and hoping someone can help me. I've collected some data but I am confused over which test to use to analyse it. ...

    Started by Dragonfly‎, 04-07-2016 10:37 AM
    psychology experiment, spss, statistical help, test to use
    • Replies: 2
    • Views: 260
    04-10-2016, 05:45 AM Go to last post
  21. Should I use ANCOVA or T Test, if I stratify my participants for randomisation?

    Hi, I am writing a proposal which randomises participants into two groups, but before randomisation i stratify by age and diagnoses (3 categories...

    Started by applepeach‎, 04-09-2016 09:27 AM
    • Replies: 0
    • Views: 126
    04-09-2016, 09:27 AM Go to last post
  22. Inter-subject agreement re timings of (unequal number of) events

    Hi everyone, I am trying to figure out what would be the best statistic to use to quantify the amount of agreement that exists between subjects...

    Started by wildetudor‎, 04-05-2016 03:25 AM
    inter-observer, inter-rater reliability, kendall tau, time series
    • Replies: 1
    • Views: 146
    04-09-2016, 07:32 AM Go to last post
  23. Need help formatting my Data!

    Hello All, (Please be prepared for minimum knowledge on my behalf!) I am currently doing some research for university so time is of the essence! ...

    Started by Georgeneedshelp‎, 04-06-2016 11:03 AM
    • Replies: 0
    • Views: 161
    04-06-2016, 11:03 AM Go to last post
  24. Interpreting repeated measures ANOVA results in Intervention Study

    I'm having one of those late night working problems, where I'm suddenly second guessing all my work and I seem to have lost all my statistics...

    Started by cait‎, 04-06-2016 12:49 AM
    intervention, repeated measures
    • Replies: 2
    • Views: 191
    04-06-2016, 10:35 AM Go to last post
  25. Which spss tests to run to compare my demographic results to my attitude score result

    Hi, I'm new to spss and i'm lost trying to do my thesis! :( I have all my descriptive stats in order and I've worked out an attitude score for...

    Started by FastAwake‎, 03-30-2016 08:41 AM
    • Replies: 3
    • Views: 290
    04-04-2016, 03:50 PM Go to last post
  26. Smile Random, non-linear relationship scatter-plot - Multiple Regression

    I'm analysing questionnaire responses. The questionnaire is based on the Theory of Planned Behaviour. There are 3 variables, which all supposedly...

    Started by WL93‎, 04-01-2016 04:07 AM
    • Replies: 2
    • Views: 268
    04-04-2016, 03:47 PM Go to last post
  27. Statistical independence

    Hello. I have a question about statistical independence. I know that this assumption is not met when you have two or more observations from the...

    Started by Toshi‎, 03-26-2016 03:38 AM
    statistical independence
    • Replies: 2
    • Views: 233
    04-02-2016, 09:43 PM Go to last post
  28. 2-Step Mediation With Multi-level Data

    Hello, I have data in which each participant responded 5 times to some questions. We want to run a mediation model in with X --> M1 --> M2 --> Y,...

    Started by einesi‎, 04-01-2016 10:05 AM
    mediation, multilevel model
    • Replies: 1
    • Views: 198
    04-02-2016, 02:17 AM Go to last post
  29. Which statistical method?

    Hi All, I'm planning my undergrad psychology project, and to be honest, stats is my big weakness. I want to conduct a study where people are...

    Started by ben10‎, 03-31-2016 03:53 AM
    • Replies: 1
    • Views: 181
    03-31-2016, 06:35 PM Go to last post
  30. Discriminant function analysis instead of ROC curve?

    Hi everyone! I'm wondering if anyone can help me shed some light on why my committee member suggested I use a discriminant function analysis as...

    Started by DefenceDoom‎, 03-28-2016 05:14 PM
    • Replies: 3
    • Views: 262
    03-28-2016, 09:20 PM Go to last post
  31. Mediation and Moderation Regression

    So I got this output from SPSS: Where do I find my pearson correlation results? Is it under Coeff? Also, do I see this as telling me that...

    Started by Michaelle‎, 03-10-2016 06:16 PM
    • Replies: 3
    • Views: 397
    03-28-2016, 12:18 PM Go to last post
  32. Questionnaire and t-test

    Hi all new to these forum , could anyone help me with these research problem I have a Questionnaire and I am truing to show that a personal value...

    Started by sandi‎, 03-27-2016 01:55 PM
    • Replies: 2
    • Views: 194
    03-28-2016, 11:14 AM Go to last post
  33. same mean different variance

    Hi, I have two samples (n=10), who done the same task. They both had the same mean, with a small difference in variance as a group. But when...

    Started by Nko‎, 03-23-2016 08:07 AM
    • Replies: 4
    • Views: 344
    03-28-2016, 07:10 AM Go to last post
  34. When to use a t test vs an anova

    Hi all, Any help would be much appreciated, I'm rather hopeless at stats and trying to design an experiment. I have two groups, one with a new...

    Started by Catherine101‎, 03-27-2016 10:09 AM
    • Replies: 1
    • Views: 313
    03-27-2016, 03:00 PM Go to last post
  35. Should I be using ANOVA?

    Hi, In my experiment, I'm comparing the time it takes for a participant to finish a visual search task across 3 different conditions. I have 15...

    Started by badmouton‎, 03-21-2016 10:21 PM
    • Replies: 3
    • Views: 281
    03-23-2016, 07:50 PM Go to last post
  36. Likert Scale with a "Not Applicable" option

    Hello all I have a questionnaire with 20 questions, all on the likert scale from 1-5. However, each question has also a "not applicable" option....

    Started by Yankel‎, 03-21-2016 02:52 PM
    • Replies: 1
    • Views: 192
    03-21-2016, 03:24 PM Go to last post
  37. 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: 247
    03-20-2016, 01:18 PM Go to last post
  38. Is ANOVA applicable for my study?

    Hi, Here's some info about my study: Looking into stereotype threat and mapping ability, hypothesising that females will perform less well than...

    Started by sch30‎, 03-14-2016 01:28 PM
    anova, dissertation, psychology, spss, uni
    • Replies: 1
    • Views: 284
    03-20-2016, 01:11 PM Go to last post
  39. Study on sitting preference

    Hey. I am very new to studying statistics so I am sorry if my post comes across as "noobish". What if I wanted to study if there were any...

    Started by StilloftheNight‎, 02-20-2016 01:58 AM
    • Replies: 10
    • Views: 744
    03-20-2016, 12:54 PM Go to last post
  40. Question 1 DV w. four levels, 2 IV's

    I'm testing the predictive effects of mood (positive/negative) and personality traits (extraversion and neuroticism) on music preference (interest...

    Started by nourb‎, 03-19-2016 05:19 AM
    experimental design, psychology statistics, spss
    • Replies: 1
    • Views: 193
    03-19-2016, 10:43 AM Go to last post
  41. Coding of Treatment Effect

    Dear all, I am new to statistics research. I remember the 1 and 0 coding of variable in regression class. But in most Psychological papers I see...

    Started by Timcoli‎, 03-19-2016 03:35 AM
    • Replies: 1
    • Views: 186
    03-19-2016, 06:22 AM Go to last post
  42. Does moderator work between positive and negative variables if it is positive?

    I need your help regarding following : we have, IV: Transformatinal leadership DV's: Intention to quit, emotional exhaustion, aggression...

    Started by hudaFZ‎, 03-16-2016 07:14 AM
    • Replies: 6
    • Views: 354
    03-17-2016, 03:40 AM Go to last post
  43. Computing Total Attitude Scores

    Hi, I am studying attitudes towards mental illness and whether they can be changed after an intervention. I will be using a mixed anova to calculate...

    Started by benside240‎, 03-10-2016 10:22 AM
    attitudes, mentalillness, psychology
    • Replies: 2
    • Views: 226
    03-10-2016, 12:53 PM Go to last post
  44. which test for repeated measures within-between group change with small sample size?

    Hi all, I have an intervention study with a very small sample size and am trying to decide the best way to analyze it. Any suggestions would be...

    Started by srl0704‎, 03-03-2016 05:28 PM
    intervention-analysis, multivariate, repeated-measures, small sample
    • Replies: 4
    • Views: 446
    03-10-2016, 12:48 PM Go to last post
  45. Sample size and random sampling

    Dear I have a question about sample size and random sampling in research. In standard research methodology books we read that samples should be...

    Started by Anthony_1000‎, 03-04-2016 03:14 PM
    • Replies: 4
    • Views: 397
    03-09-2016, 01:07 PM Go to last post
  46. Directional test help

    Directional test (H1:M<μ) In the city there is normally a mean of 75 parking tickets issued per officer with a standard deviation of 12. The...

    Started by krystal1994‎, 03-07-2016 11:29 AM
    directional test, z score, z test
    • Replies: 0
    • Views: 279
    03-07-2016, 11:29 AM Go to last post
  47. I need help with directional test

    Directional test (H1:M>μ) You are trying out a new fertilizer on your farm. The population mean for your corn is 130 lbs per acre with a...

    Started by krystal1994‎, 03-07-2016 11:28 AM
    directional test, z score, z test
    • Replies: 0
    • Views: 187
    03-07-2016, 11:28 AM Go to last post
  48. ANCOVA interpretation

    Hi, I have a continuous independent variable (AGE_CONT),a categorical independent variable (EXP_CATER, within subject, three categories) and one...

    Started by minidragon‎, 03-03-2016 08:50 AM
    • Replies: 1
    • Views: 259
    03-07-2016, 07:10 AM Go to last post
  49. Post Psychology Stats Report Help Please

    Hi there, I'm currently working on a statistics report for a project in psychology. I've collected two lots of data: test scores on two...

    Started by roseberry‎, 03-04-2016 05:06 PM
    psychology report, spss, statistical tests
    • Replies: 0
    • Views: 217
    03-04-2016, 05:06 PM Go to last post
  50. The Effects of Autism-Like Traits on Balance

    I am going to do an experiment examining associations between Autism-Like Traits (IV) and balance (DV). To assess this, all of the participants...

    Started by MTS‎, 02-27-2016 08:16 AM
    associations, autism, balance, interactions
    • Replies: 1
    • Views: 301
    02-27-2016, 09:21 AM Go to last post
  51. Using effect sizes to determine questionnaire sensitivity

    Hi guys, I ran a therapeutic group with 6 people and got them to complete 5 questionnaires before the group and repeat them after the group. I'm...

    Started by bibbetybob‎, 02-27-2016 06:44 AM
    cohen's d, effect size, questionnaire sensitivity
    • Replies: 0
    • Views: 181
    02-27-2016, 06:44 AM Go to last post
  52. Paired T-test: significant results (.000) which seem very unlikely

    Hi, I'm having trouble using a T-test. I asked participants about Big Five characteristics, once when in a social situation and again (same...

    Started by Midna‎, 02-11-2016 02:35 AM
    • Replies: 4
    • Views: 426
    02-26-2016, 10:17 AM Go to last post
  53. Compare scores to normscores

    Hi all, In my study patients have completed a questionnaire on distress (the HADS) and also marital satisfaction. My colleague told me it would...

    Started by Kuma‎, 02-25-2016 11:03 AM
    • Replies: 0
    • Views: 192
    02-25-2016, 11:03 AM Go to last post
  54. College student need help with homework

    hello! i am a college student, I know how to do Z score and raw score, but i cant quite understand what this question is asking of me. I know we need...

    Started by aqualana‎, 02-17-2016 07:38 PM
    • Replies: 2
    • Views: 372
    02-20-2016, 02:09 AM Go to last post
  55. Wink Quartile and Decile Proportions

    A runner keeps track of her finishing times for each 5K race that she runs. The quartiles of her times (in minutes) were as follows: 35.24...

    Started by mpalumb‎, 02-15-2016 10:32 AM
    • Replies: 2
    • Views: 299
    02-15-2016, 02:28 PM Go to last post
  56. Analysis of categorical DV and multiple Categorical IV's over four weeks of testing?

    Hi there, I am a returning student after having a baby and deeply confused about stats. I ran a case study experiment with my daughter examining...

    Started by cat2314‎, 02-13-2016 07:02 AM
    • Replies: 3
    • Views: 335
    02-14-2016, 06:42 AM Go to last post
  57. Repeated measures at many different time points

    Hello, I have logged movement data from a number of subjects (n=21) who were moving during 3 different conditions. Each subject was presented...

    Started by emmenru‎, 02-12-2016 06:49 PM
    repeated measures
    • Replies: 0
    • Views: 217
    02-12-2016, 06:49 PM Go to last post
  58. Which method?

    Hello friends of statistic, first of all - sorry for my bad english, it's not my mother language :( ... Here is my problem. I have to make a...

    Started by yologer‎, 02-05-2016 05:42 AM
    mediation, moderated mediation
    • Replies: 0
    • Views: 349
    02-05-2016, 05:42 AM Go to last post
  59. Should I use multiple Chi-square?

    I have a questionnaire study which I have a list of options (say apple, orange, peach...) and subjects have to choose 5 of them in 3 different time...

    Started by pancy‎, 01-28-2016 10:18 PM
    • Replies: 9
    • Views: 802
    02-03-2016, 10:35 PM Go to last post
  60. Question ANOVA with nominal dependent variable?

    Hello, for a hypothesis I collected the following data: -Quantitative data of an eye-tracking with counted cases for looking at specific things...

    Started by Maik‎, 01-20-2016 04:25 PM
    • Replies: 3
    • Views: 462
    02-01-2016, 05:17 AM Go to last post

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