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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: 29,846
    11-10-2005, 12:21 AM Go to last post
  1. 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: 1,012
    03-28-2016, 09:20 PM Go to last post
  2. 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: 1,493
    03-28-2016, 12:18 PM Go to last post
  3. 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: 844
    03-28-2016, 11:14 AM Go to last post
  4. 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: 1,125
    03-28-2016, 07:10 AM Go to last post
  5. 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: 2,239
    03-27-2016, 03:00 PM Go to last post
  6. 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: 1,049
    03-23-2016, 07:50 PM Go to last post
  7. 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: 2,271
    03-21-2016, 03:24 PM Go to last post
  8. 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: 1,142
    03-20-2016, 01:18 PM Go to last post
  9. 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: 979
    03-20-2016, 01:11 PM Go to last post
  10. 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: 1,710
    03-20-2016, 12:54 PM Go to last post
  11. 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: 1,594
    03-19-2016, 10:43 AM Go to last post
  12. 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: 2,211
    03-19-2016, 06:22 AM Go to last post
  13. 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: 1,215
    03-17-2016, 03:40 AM Go to last post
  14. 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: 947
    03-10-2016, 01:53 PM Go to last post
  15. 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: 1,408
    03-10-2016, 01:48 PM Go to last post
  16. 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: 1,750
    03-09-2016, 02:07 PM Go to last post
  17. 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: 1,014
    03-07-2016, 12:29 PM Go to last post
  18. 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: 571
    03-07-2016, 12:28 PM Go to last post
  19. 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: 881
    03-07-2016, 08:10 AM Go to last post
  20. 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: 747
    03-04-2016, 06:06 PM Go to last post
  21. 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: 780
    02-27-2016, 10:21 AM Go to last post
  22. 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: 572
    02-27-2016, 07:44 AM Go to last post
  23. 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: 1,420
    02-26-2016, 11:17 AM Go to last post
  24. 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: 841
    02-25-2016, 12:03 PM Go to last post
  25. 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: 907
    02-20-2016, 03:09 AM Go to last post
  26. 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: 1,240
    02-15-2016, 03:28 PM Go to last post
  27. 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: 1,096
    02-14-2016, 07:42 AM Go to last post
  28. 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: 984
    02-12-2016, 07:49 PM Go to last post
  29. 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: 907
    02-05-2016, 06:42 AM Go to last post
  30. 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: 1,634
    02-03-2016, 11:35 PM Go to last post
  31. 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: 1,456
    02-01-2016, 06:17 AM Go to last post
  32. 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: 1,195
    01-30-2016, 05:20 PM Go to last post
  33. 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: 833
    01-29-2016, 08:58 AM Go to last post
  34. 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: 1,025
    01-24-2016, 02:12 PM Go to last post
  35. Question SPSS Mixed Models with only 5 participants...?

    ...solved...

    Started by broek84‎, 01-23-2016 05:42 PM
    • Replies: 0
    • Views: 650
    01-23-2016, 05:42 PM Go to last post
  36. 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: 778
    01-23-2016, 10:17 AM Go to last post
  37. 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: 989
    01-22-2016, 06:23 AM Go to last post
  38. ANOVA vs MANCOVA

    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: 619
    01-21-2016, 09:44 AM Go to last post
  39. 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: 986
    01-17-2016, 10:23 PM Go to last post
  40. 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: 2,717
    01-17-2016, 12:11 PM Go to last post
  41. 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: 1,088
    01-15-2016, 12:36 PM Go to last post
  42. 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: 1,543
    01-14-2016, 05:03 PM Go to last post
  43. 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: 1,442
    01-13-2016, 01:36 AM Go to last post
  44. 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: 917
    01-12-2016, 02:16 PM Go to last post
  45. 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: 790
    01-12-2016, 06:37 AM Go to last post
  46. 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: 1,937
    12-30-2015, 05:52 PM Go to last post
  47. 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: 1,441
    12-30-2015, 08:57 AM Go to last post
  48. 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: 854
    12-22-2015, 09:24 AM Go to last post
  49. 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: 1,379
    12-18-2015, 07:32 PM Go to last post
  50. What analysis do IQ tests use?

    I can't find anywhere what statistical analysis IQ tests (like Weschler scales, BAS, etc.) use. It is not stated in any of their material (that I...

    Started by cmms‎, 12-13-2015 01:53 PM
    factor analysis
    • Replies: 3
    • Views: 1,241
    12-13-2015, 08:34 PM Go to last post
  51. Comparing between correlation coefficients

    Hi, I have experimental design which includes 3 dependent variables (Reading Mind in the Eyes test and 2 other measures of social cognition, for...

    Started by Gilina78‎, 12-13-2015 04:33 PM
    correlations; dependancy, correlations; time series, mancova, regression analysis, zsteiger's z
    • Replies: 0
    • Views: 1,200
    12-13-2015, 04:33 PM Go to last post
  52. What does it mean to norm an instrument say mathematics attitudes scale?

    Hello I was wondering if norming an instrument is the same as developing an instrument say some mathematics attitudes survey or something? I...

    Started by Ilma‎, 12-12-2015 10:21 PM
    • Replies: 1
    • Views: 1,395
    12-13-2015, 04:22 AM Go to last post
  53. marginally significant 3-way interaction ANOVA

    Hi everyone, I have to analyze the data of an intervention study, in which a treatment and control group were tested before and after the...

    Started by dejam‎, 12-12-2015 12:24 PM
    • Replies: 1
    • Views: 860
    12-12-2015, 06:23 PM Go to last post
  54. ANCOVA assumptions SPSS help..!

    Hi everyone, Just wondering if someone could help me. I need to conduct a repeated measures ancova (4 levels) with no between subjects factor....

    Started by ANCOVA'D‎, 12-10-2015 06:54 AM
    • Replies: 0
    • Views: 1,063
    12-10-2015, 06:54 AM Go to last post
  55. When to use Bonferroni

    I am working with a mark-all-that-apply survey question that has 8 categorical response options. I am comparing responses statistically between two...

    Started by N. Adams‎, 12-09-2015 03:42 PM
    bonferroni correction, groups, multiple response
    • Replies: 0
    • Views: 1,573
    12-09-2015, 03:42 PM Go to last post
  56. "bias" in chi-square GOF tests?

    Simple question (simple for some people) about the chi-square GOF test: Let's say we do a chi-square GOF test where the the expected values are...

    Started by bruin‎, 12-07-2015 02:14 PM
    • Replies: 1
    • Views: 2,265
    12-07-2015, 02:40 PM Go to last post
  57. 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: 1,101
    12-06-2015, 05:34 PM Go to last post
  58. What's a good resource to brush up on college level psychology stats?

    I've taken quite a few different courses, but have since forgotten some of the details. I'm interested in the applied aspects of sampling, all sorts...

    Started by etest‎, 12-02-2015 12:28 PM
    • Replies: 1
    • Views: 1,078
    12-02-2015, 08:24 PM Go to last post
  59. Comparing absolute values of difference scores between two groups

    I have two groups (A and B) that each completed a different version of an experimental measure (measure A and measure B). Both groups also completed...

    Started by ShakeyD‎, 12-01-2015 09:34 PM
    measurement, reliability, variance
    • Replies: 4
    • Views: 1,410
    12-02-2015, 06:19 PM Go to last post
  60. Dealing with Missing Data...

    So I have ran into an issue with my study. We utilized Qualtrics to design an online survey/study that had subjects complete 10 questionnaires and...

    Started by theemezz0‎, 11-30-2015 12:41 PM
    • Replies: 9
    • Views: 3,088
    12-01-2015, 07:19 PM Go to last post

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