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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: 31,428
    11-10-2005, 12:21 AM Go to last post
  1. 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: 737
    04-14-2016, 08:58 AM Go to last post
  2. 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: 1,561
    04-12-2016, 01:43 AM Go to last post
  3. 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: 1,255
    04-10-2016, 05:45 AM Go to last post
  4. 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: 1,205
    04-09-2016, 09:27 AM Go to last post
  5. 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: 1,925
    04-09-2016, 07:32 AM Go to last post
  6. 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: 817
    04-06-2016, 11:03 AM Go to last post
  7. 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: 1,048
    04-04-2016, 03:50 PM Go to last post
  8. 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: 1,430
    04-04-2016, 03:47 PM Go to last post
  9. 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: 1,161
    04-02-2016, 09:43 PM Go to last post
  10. 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: 1,114
    04-02-2016, 02:17 AM Go to last post
  11. 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: 915
    03-31-2016, 06:35 PM Go to last post
  12. 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: 1,341
    03-28-2016, 09:20 PM Go to last post
  13. 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 07:16 PM
    • Replies: 3
    • Views: 1,805
    03-28-2016, 12:18 PM Go to last post
  14. 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: 1,040
    03-28-2016, 11:14 AM Go to last post
  15. 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: 1,396
    03-28-2016, 07:10 AM Go to last post
  16. 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: 2,562
    03-27-2016, 03:00 PM Go to last post
  17. 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: 1,270
    03-23-2016, 07:50 PM Go to last post
  18. 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: 2,819
    03-21-2016, 03:24 PM Go to last post
  19. 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: 1,472
    03-20-2016, 01:18 PM Go to last post
  20. 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: 1,218
    03-20-2016, 01:11 PM Go to last post
  21. 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 02:58 AM
    • Replies: 10
    • Views: 1,966
    03-20-2016, 12:54 PM Go to last post
  22. 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: 2,192
    03-19-2016, 10:43 AM Go to last post
  23. 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: 2,612
    03-19-2016, 06:22 AM Go to last post
  24. 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: 1,422
    03-17-2016, 03:40 AM Go to last post
  25. 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 11:22 AM
    attitudes, mentalillness, psychology
    • Replies: 2
    • Views: 1,197
    03-10-2016, 01:53 PM Go to last post
  26. 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 06:28 PM
    intervention-analysis, multivariate, repeated-measures, small sample
    • Replies: 4
    • Views: 1,683
    03-10-2016, 01:48 PM Go to last post
  27. 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 04:14 PM
    • Replies: 4
    • Views: 2,212
    03-09-2016, 02:07 PM Go to last post
  28. 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 12:29 PM
    directional test, z score, z test
    • Replies: 0
    • Views: 1,206
    03-07-2016, 12:29 PM Go to last post
  29. 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 12:28 PM
    directional test, z score, z test
    • Replies: 0
    • Views: 764
    03-07-2016, 12:28 PM Go to last post
  30. 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 09:50 AM
    • Replies: 1
    • Views: 1,112
    03-07-2016, 08:10 AM Go to last post
  31. 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 06:06 PM
    psychology report, spss, statistical tests
    • Replies: 0
    • Views: 905
    03-04-2016, 06:06 PM Go to last post
  32. 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 09:16 AM
    associations, autism, balance, interactions
    • Replies: 1
    • Views: 1,176
    02-27-2016, 10:21 AM Go to last post
  33. 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 07:44 AM
    cohen's d, effect size, questionnaire sensitivity
    • Replies: 0
    • Views: 716
    02-27-2016, 07:44 AM Go to last post
  34. 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 03:35 AM
    • Replies: 4
    • Views: 1,805
    02-26-2016, 11:17 AM Go to last post
  35. 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 12:03 PM
    • Replies: 0
    • Views: 1,129
    02-25-2016, 12:03 PM Go to last post
  36. 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 08:38 PM
    • Replies: 2
    • Views: 1,106
    02-20-2016, 03:09 AM Go to last post
  37. 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 11:32 AM
    • Replies: 2
    • Views: 1,611
    02-15-2016, 03:28 PM Go to last post
  38. 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 08:02 AM
    • Replies: 3
    • Views: 1,318
    02-14-2016, 07:42 AM Go to last post
  39. 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 07:49 PM
    repeated measures
    • Replies: 0
    • Views: 1,232
    02-12-2016, 07:49 PM Go to last post
  40. 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 06:42 AM
    mediation, moderated mediation
    • Replies: 0
    • Views: 1,255
    02-05-2016, 06:42 AM Go to last post
  41. 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 11:18 PM
    • Replies: 9
    • Views: 1,844
    02-03-2016, 11:35 PM Go to last post
  42. 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 05:25 PM
    • Replies: 3
    • Views: 1,793
    02-01-2016, 06:17 AM Go to last post
  43. 2x3 Experiment Analysis

    Hey guys this is my first post to this site, please be kind. I am working on an 2x3 experiment design. Just looking for some insight on the stats....

    Started by Loremac‎, 11-10-2015 04:15 PM
    • Replies: 1
    • Views: 1,373
    01-30-2016, 05:20 PM Go to last post
  44. Variables are awkward. Which test should I run for this memory experiment?

    Basically I'm doing a recall experiment where participants are separated into 2 groups and asked to visualize the words in a specific context...

    Started by Odysseus85‎, 01-25-2016 07:39 AM
    anova, between group, count data, recall
    • Replies: 1
    • Views: 1,058
    01-29-2016, 08:58 AM Go to last post
  45. What stat test and how many sample size?

    I'm running a study with 1 IV three levels (categorical) and 1 continuous moderator on 1 continuous DV. What stat test do you suggest and how do I...

    Started by mass_on93‎, 01-24-2016 02:12 PM
    • Replies: 0
    • Views: 1,337
    01-24-2016, 02:12 PM Go to last post
  46. Question SPSS Mixed Models with only 5 participants...?


    Started by broek84‎, 01-23-2016 05:42 PM
    • Replies: 0
    • Views: 882
    01-23-2016, 05:42 PM Go to last post
  47. Compare Sexes Within Groups in Multilevel Data

    Hi everyone, I have a large data set including about 50 groups of 6 participants, with about 2/3 same-sex groups and 1/3 mixed-sex groups. ...

    Started by Hann‎, 01-23-2016 07:22 AM
    multilevel modeling
    • Replies: 1
    • Views: 1,009
    01-23-2016, 10:17 AM Go to last post
  48. which statistical analysis to use? MLM, t tests, ANOVA?

    Hi, my research question is "do large cognitive changes precede a period of mood stability?" (N = 30), I have 20 therapy sessions data for each...

    Started by rubelzain83‎, 01-22-2016 12:18 AM
    • Replies: 1
    • Views: 1,270
    01-22-2016, 06:23 AM Go to last post

    Hello. I'm doing a study on people with high vs. low self-compassion and I want to compare them on a number of variables. Self-compassion in this...

    Started by psychoneurologist‎, 01-21-2016 09:44 AM
    ancova, mancova, spss
    • Replies: 0
    • Views: 807
    01-21-2016, 09:44 AM Go to last post
  50. Which STAT to use? Compare one persons total Seizures in a month over 12 months

    My goal is to find out if there is a significant difference between the total numbers of seizures in a month over the course of a year for one...

    Started by Shaks‎, 01-17-2016 03:37 PM
    anova, epilepsy, software search
    • Replies: 1
    • Views: 1,274
    01-17-2016, 10:23 PM Go to last post
  51. 1-way vs 2-way repeated measures ANOVA with missing data

    I have performed an experiment where I tested how long it took users to reach various points on table and their perception of how difficult the task...

    Started by blooop‎, 01-16-2016 03:03 PM
    • Replies: 4
    • Views: 3,233
    01-17-2016, 12:11 PM Go to last post
  52. Difference Measurement (compare means) between two continuous variables

    Hello, I'm looking for a test and need some help :( .. Variable 1: value (continuous) Variable 2: expectation (continuous) Dependent...

    Started by yologer‎, 01-15-2016 09:08 AM
    compare means
    • Replies: 5
    • Views: 1,503
    01-15-2016, 12:36 PM Go to last post
  53. Question What is best method to calculate correlation for 2 nominal variables?

    Hello, I am analyzing data that looks at several nominal variables (e.g. employment status, race, gender, etc.) to determine if it plays a factor...

    Started by greathl21‎, 01-14-2016 02:27 PM
    correlation, cramer's v, nominal variable
    • Replies: 5
    • Views: 1,761
    01-14-2016, 05:03 PM Go to last post
  54. Dealing with Score Dependency in Repeated Measures ANOVA

    I am writing a report for my company looking at the impact of a relationship education curriculum on participants. Prior to the class, immediately...

    Started by statsgirl87‎, 01-11-2016 05:20 PM
    repeated measures anova, score dependency
    • Replies: 3
    • Views: 1,761
    01-13-2016, 01:36 AM Go to last post
  55. Between-subjects or mixed design depending on ANCOVA conducted

    Hello, In a study I'm evaluating,*participants experienced the same stressful event and were then split into 5 different experimental conditions....

    Started by bedalo94‎, 01-11-2016 08:49 AM
    • Replies: 1
    • Views: 1,150
    01-12-2016, 02:16 PM Go to last post
  56. curvilinear regression using 2covariates

    Hello, For my dissertation I am looking at the effects of overparenting (cont. variable) on students' self-regulated learning (cont. variable). I...

    Started by bre384‎, 01-11-2016 09:21 PM
    • Replies: 1
    • Views: 974
    01-12-2016, 06:37 AM Go to last post
  57. Gender differencies + effect size

    Hi, I have just received some results from various tests. I would like to check the gender differencies (boys vs girls) in test scores. I am...

    Started by lohengrin‎, 12-27-2015 11:37 AM
    cohen function, wilcox test
    • Replies: 2
    • Views: 2,179
    12-30-2015, 05:52 PM Go to last post
  58. Factorial MANOVA or multivariate multiple linear regression? (2 DVs and 6 IVs)

    Hello, Very briefly, I'm working on my research proposal for my Psych MSc, and I'm trying to work out which tests would be best to use. As it...

    Started by ArielPsych‎, 12-30-2015 08:57 AM
    psychology statistics, stats help
    • Replies: 0
    • Views: 2,061
    12-30-2015, 08:57 AM Go to last post
  59. Repeated Measures of Latent Variable DV? [Which Test?]

    Hello, I'm attempting to analyze the effects of 1 categorical IV (before and after participants complete a program) on 1 latent variable DV that...

    Started by magwai‎, 12-22-2015 09:24 AM
    • Replies: 0
    • Views: 1,044
    12-22-2015, 09:24 AM Go to last post
  60. Power analysis for GEE

    I am designing a study that would require using GEE (generalized estimating equations) to analyze repeated measures of a dichotomous variable. Is...

    Started by blc‎, 12-07-2015 02:48 PM
    dichotomous dv, gee, repeated measures design
    • Replies: 2
    • Views: 1,553
    12-18-2015, 07:32 PM Go to last post

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