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# Forum: Psychology Statistics

Psychological statistics, quantitative psychology. Statistics in social sciences. Experimental design, data analysis.

Please provide us with some basic information before we can give useful advice: 1. purpose of the study / research question / hypotheses, if...

• Replies: 0
• Views: 26,131
11-10-2005, 12:21 AM
1. ### Help - analyzing monthly data for nursing home residents

Hi there - I am trying to analyze data from approximately 40 nursing home residents. We collected both Cohen-Mansfield and Cornell Brown monthly,...

• Replies: 6
• Views: 128
Yesterday, 03:41 PM
2. ### Paired sample t test vs Wilcoxon signed ranks test

As part of assessment, we are using a five-question multiple choice pretest and posttest. We have been using the Wilcoxon signed ranks test to...

• Replies: 0
• Views: 173
05-19-2017, 01:33 PM
3. ### Choosing the righ test

Hello, I'm a psychology student and I'm really, really bad at SPSS so I need some help. If this is not the right place to post this, please...

• Replies: 7
• Views: 370
05-16-2017, 11:05 PM
4. ### One way ANCOVA - Data failing assumption of linearity

Hello I'm working on my Msc in Psychology thesis, and I've chosen to explore if there are group differences between Internal vs External...

• Replies: 0
• Views: 121
05-11-2017, 05:08 AM
5. ### Correction factor for density calculation of different network sizes

Hi everyone, For my PhD research I am comparing the density of social networks of different sizes, and density is simply calculated in a linear...

• Replies: 0
• Views: 109
05-10-2017, 03:54 PM
6. ### iPod Track Listening & Biological Samples— Within-Subjects Test/Regression?

I am analyzing data in which participants listened to iPods and provided biological samples on the same days. The iPod Listening Intervention was 1...

• Replies: 0
• Views: 100
05-10-2017, 11:40 AM
7. ### Help with Ordinal Data

Hi all! I have some data collected for an intervention study where we had participants from two groups (anxious vs non-anxious) undergo one of two...

• Replies: 0
• Views: 155
05-08-2017, 02:30 PM
8. ### Test Your Quantitatie Research Design Knowledge

CAN SOMEONE PLEASE HELP WITH THE FOLLOWING QUESTIONS??? Karsh (1983) designed an experiment on the relationship between early handling and...

• Replies: 5
• Views: 409
05-08-2017, 08:25 AM
9. ### All this data and IDK what to do with it.

I need assistance. I am an undergrad social work major in a stats class. I have access to excel and SPSS. My research question: Does the lack of...

• Replies: 0
• Views: 126
05-08-2017, 02:02 AM
10. ### What analysis do I run?

Hi All, I am conducting a study within the ASD population that is looking at IQ, executive function and adaptive skills for which of them I am...

• Replies: 11
• Views: 475
05-08-2017, 01:57 AM
11. ### urgent spss anova help!!!!

I have to enter data into spss that is already given to me the study description is bellow. i would like to know three things; 1 is this a one-way...

• Replies: 4
• Views: 205
05-08-2017, 01:56 AM
12. ### Help in analyzing 3 raters' data in 2-way ANOVA

Greetings, I completed a small pilot study recently that investigated a new therapy for music performance anxiety. My N=7. One hypothesis I...

• Replies: 2
• Views: 125
05-08-2017, 01:55 AM
13. ### Case Study on an PROPOSED EXPERIMENT (HELP)

CAN SOMEONE PLEASE HELP WITH THE FOLLOWING QUESTIONS??? I am not familiar with some of the more inherent design limitations and improvements? ...

• Replies: 0
• Views: 192
05-06-2017, 07:14 AM
14. ### MANOVA or something else?

Hello everyone! Please excuse my english, it is not my first language, so if something is unclear, let me know :) For my master thesis, I'm...

• Replies: 15
• Views: 647
05-05-2017, 05:55 AM
15. ### Unequal group sized in repeated measures ANOVA?

I know that a major assumption of Two-way ANOVAs are that the group sizes are equal. If I am doing a Repeated Measures ANVOA with a 2...

• Replies: 0
• Views: 165
05-04-2017, 01:49 PM
16. ### Need help interpreting these studies correctly

How valid are the conclusions being drawn in the following (admittedly sketchy, they are just blogs) sources?:...

• Replies: 2
• Views: 207
05-04-2017, 08:25 AM
17. ### 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...

• Replies: 1
• Views: 257
04-28-2017, 04:17 PM
18. ### What analysis to compare group to genpop based solely on percentile scores

Hi guys, I'm completing my honors year in Psychology through an Australian University. I'm just about to do my results section for my thesis and need...

• Replies: 1
• Views: 214
04-27-2017, 10:29 AM
19. ### Testing differences between groups over time

Hello, I am writing a research proposal that looks at a change in scores over time between three groups. Here is the basic set-up: Three...

• Replies: 0
• Views: 208
04-19-2017, 09:56 AM
20. ### Testing between scores of three groups

17 teachers answered a survey of 27 questions for three Groups of students (below average, average, above average) The answers to the questions are...

• Replies: 6
• Views: 356
04-19-2017, 04:29 AM
21. ### Correcting for repeated testing with 4 mediation analyses?

Hi guys, First time poster here, sorry if I post this at the wrong spot or something like that. For my thesis if have the following 4...

• Replies: 0
• Views: 167
04-17-2017, 11:00 AM
22. ### Descriptive Statistics and Regression Help

Hi all, I need help writing some results for my report. I am very rusty with statistics as I've taken a long break from it all :( safe to say I...

• Replies: 0
• Views: 247
04-15-2017, 06:30 PM
23. ### Correlation Analysis on Ordinal and Continuous Data (Spearman's?)

My study is looking at the effects of working memory training on smoking related behaviour. We basically trained half participants with a dual n back...

• Replies: 0
• Views: 209
04-14-2017, 08:16 AM
24. ### ANOVA What ANOVA should I use?

I'm writing a research proposal and I'm not sure what statitical analysis I should use. I was thinking about using ANOVA, but I don't know what ANOVA...

• Replies: 7
• Views: 339
04-13-2017, 08:36 PM
25. ### I don't know what statistical analysis to use

Hello, I'm writing a research proposal for my psy 400 class and I'm not sure what statistical analysis to use for my expected results. The purpose of...

• Replies: 0
• Views: 154
04-13-2017, 04:13 PM
26. ### warning: "covariance matrix of latent variables is not positive definite"

Hi all, I ran a 5 factor CFA model, and I got a warning saying that the covariance matrix of my latent variables is not positive definite. I...

• Replies: 2
• Views: 231
04-13-2017, 03:12 PM
27. ### Metaanalysis Tanner-stages Probit/Logit/...

Hello, I am running a metaanalysis about the ages of girls and boys in the Tanner-stages of puberty (https://en.wikipedia.org/wiki/Tanner_scale)....

• Replies: 0
• Views: 204
04-13-2017, 01:41 PM
28. ### Finding an overall level of Motivation (from a motivational questionnaire)

Hi, i was hoping i could get some help concerning the statistics of factors in a Motivational Questionnaire. Long story short, in the company i...

• Replies: 0
• Views: 133
04-13-2017, 10:01 AM
29. ### Tests for B mediating or moderating A->C, w/ path analysis?

I'm hoping to use path analysis to learn more about the relationship between three individual difference variables. I'm new to Mplus and to path...

• Replies: 0
• Views: 114
04-12-2017, 09:58 PM
30. ### Multiple IVs and DVs- which test should be used?

Hey guys! I've been provided with a data set and asked to do two analyses based on the following study aims: 1. Look at associations between the...

• Replies: 1
• Views: 229
04-12-2017, 08:25 AM
31. ### Determining sample size from confidence interval and significance level

Hi everyone, I am studying a university level stats course at the moment and I have been given some excerises to take home that I am struggling...

• Replies: 1
• Views: 290
04-09-2017, 04:31 PM
32. ### Determining If Difference Score Was Obtained By Chance

For example lets say a counselor has been using a depression test on clients at the start of treatment and again 6 months later. When the counselor...

• Replies: 2
• Views: 292
04-07-2017, 08:36 PM
33. ### Manova?

Hi, I am doing data analisis for my research and I kinda got stuck with it, I have seached alot and I am getting inconsistent informations if it...

• Replies: 0
• Views: 114
04-06-2017, 08:44 AM
34. ### SEM Mediation using bootstrapping approach

Hi, I am performing mediation analysis using structural equation modelling (I'm using the lavaan package in 'R'). I am using the bootstrapping...

• Replies: 4
• Views: 428
04-05-2017, 08:53 AM
35. ### Family Relationship version of Factor analysis for Japanese Groups

I am trying to create a scale to measure "comportment" (bodily manners, gyougi) among Japanese and I am doing an exploratory factor analysis...

• Replies: 0
• Views: 271
04-03-2017, 11:58 PM
36. ### Lack of homogeneity of Variance in two-way ANOVA

Hi, I am currently analyzing my data in SPSS. Since I am testing the effect of two independent variables on a dependent one, I was planning on...

• Replies: 4
• Views: 539
04-02-2017, 12:03 AM
37. ### Signal detection theory - d' and C - unexpected results

Hi I've conducted a 2-alternative forced-choice experiment whereby participants were shown images, and then in the test phase had to choose which...

• Replies: 1
• Views: 294
04-01-2017, 11:34 PM
38. ### Correction for attenuation: WAIS-IV and test X

Hi, I have been asked to do a correction for attenuation of the context between a specific test (Lets call it test X) and a specific part-test of...

• Replies: 7
• Views: 490
03-30-2017, 03:08 PM
39. ### Interpreting my data (bias?)

Hello everyone! I had participants learn items from a list and afterwards do a recognition test on them. (EXPERIMENTAL GROUP) the same...

• Replies: 0
• Views: 582
03-24-2017, 11:47 AM
40. ### Correct way of reporting Chi square with IV 4 levels results

Sorry, if the question is silly. Cannot find anywhere what will be a correct way of reporting Chi Square results for the case when IV has 4 levels (4...

• Replies: 4
• Views: 538
03-23-2017, 10:02 PM
41. ### Signal Detection Theory - Calculating d'

Hi there. I'm currently doing the analysis for my undergraduate study, and I'm wondering if someone could help me with Signal Detection Theory,...

• Replies: 3
• Views: 509
03-23-2017, 12:43 PM
42. ### Need help in Polynomial Regression : constant value and control variables

Solved. Please remove thank you : )

• Replies: 0
• Views: 308
03-22-2017, 11:50 PM
43. ### Which post-hoc test for a One way repeated measures ANOVA

Can I use a Tukey test to test all pairwise comparisons for a repeated measures design? :) THANKS

• Replies: 3
• Views: 412
03-22-2017, 10:45 PM
44. ### How to organize Multilevel Model in R

Hello, I am currently running an experiment where we measure escape latency and seeing if the presence of a drug has an effect on this. Each rat...

• Replies: 0
• Views: 327
03-22-2017, 10:40 PM
45. ### Two-way MANOVA

Hi, how do I fully follow up this MANOVA, please??? 2 IVs: Exposure Therapy (2 levels: control, or virtual reality) and Medication (2 levels:...

• Replies: 0
• Views: 233
03-22-2017, 04:02 PM
46. ### Which ANOVA to use

I have 20 subjects who are all presented with 12 pictures. These 12 pictures are split into 4 categories: Big Inanimate, Big Animate, Small...

• Replies: 2
• Views: 340
03-22-2017, 06:04 AM
47. ### Help finding a term used in validity - psychometric testing

A colleague has asked me for help with the name of a recognised situation whereby truncated information (e.g. a short questionnaire) is used to...

• Replies: 10
• Views: 730
03-22-2017, 04:22 AM
48. ### Likert scale data -can I use paired t-test? What about normality testing?

Hey all! I have read many contradicting manuals and advice, so I decided to ask the best experts –you guys :) I have data from 40 subjects. I...

• Replies: 6
• Views: 742
03-19-2017, 05:19 PM
49. ### Interaction follow-ups

Hi! I have ran a 2x2x2 ANOVA (B-W-W). There was no 3-way interaction, but there was a 2-way interaction for my 2 within-subjects factors. I'm a...

• Replies: 0
• Views: 307
03-19-2017, 09:47 AM
50. ### MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

Hallo there :wave:, I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV) (both n=...

• Replies: 0
• Views: 255
K_T
03-17-2017, 01:25 PM
51. ### MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

Hallo there :wave:, I am examining the difference in illness models (by asking several Likert scale type questions: DV) for refugees (n=100) and...

• Replies: 0
• Views: 184
K_T
03-17-2017, 12:11 PM
52. ### What are the limitations to feeling thermometers?

Hi there, I received the following comment from a reviewer and am a bit stuck on how I should answer: The comment is referring to our use...

• Replies: 2
• Views: 424
03-16-2017, 03:52 PM
53. ### Does it make sense to conduct a Hierarchical Principal Compomnent Analysis (PCA)?

So I have twelve variables that theoretically belong to the same dimension and I want do reduce them to one single item. A hierarchical factor...

• Replies: 1
• Views: 634
03-13-2017, 08:56 AM
54. ### Which test to use?

I have to analyze a within-subject experiment with a continuous dependent variable and a categorical dependent variable (brain stimulation: Anode,...

• Replies: 1
• Views: 393
03-13-2017, 08:53 AM
55. ### Assumptions of Bonferroni correction

Hi everyone, I recently learned that the Bonferroni correction assumes that all of the hypothesis tests we're conducting on the same data are...

• Replies: 3
• Views: 606
03-13-2017, 08:52 AM

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