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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: 29,992
11-10-2005, 12:21 AM
1. ### Testing interaction between measures which are in different units

Hi, I have within-subject design (each subject came twice). One of the visits contained manipulation and another was a placebo. For each...

• Replies: 0
• Views: 976
06-28-2014, 06:02 AM
2. ### I am terrible at statistics and need help regarding which analysis to choose

Hi everyone, As my title states; statistics have always been very difficult for me. My teacher asked me to think about what analyses she could...

• Replies: 5
• Views: 1,603
06-27-2014, 11:38 AM
3. ### Comparing exp and control groups in a mixed design with a comparatively small N

My study investigates the type of dialogue and behavior between children working in groups on a class activity, with and without an intervention. It...

• Replies: 0
• Views: 1,250
rsm
06-26-2014, 01:29 AM
4. ### Queries regarding ANCOVA and MANCOVA

In a pre-post test experimental study having 3x2 factorial design, there are: 1. two independent variables: (a) teaching methods (3...

• Replies: 42
• Views: 13,017
06-24-2014, 11:13 AM
5. ### interpreting multi-level logit model

Hi, I have this output from Stata (an explanation of the variables follows). As far as I understand, the policyfoundation coefficient is...

• Replies: 0
• Views: 1,619
06-24-2014, 09:32 AM
6. ### paired sample t-test for repeated measures in 1 subject

I am conducting a psychology experiment. In my pilot study I analyze responses of one subject which ran through two conditions. The task is to...

• Replies: 9
• Views: 2,134
06-23-2014, 05:51 AM
7. ### Low Cronbachs alpha when using a standardised measure- how do I explain this?

Hi, for my thesis I conducted cronbachs alpha on several measures- the core questionnaire is the Five Facet Mindfulness Questionnaire (FFMQ). My...

• Replies: 3
• Views: 1,382
06-22-2014, 01:38 PM
8. ### How to analyze a variable measured on a Likert scale and its interaction with another

I have to analyze this variable which consists of scores given to 3 items (1-9 scale). This "likert scale" measures "brand commitment" if thats...

• Replies: 1
• Views: 1,017
06-17-2014, 08:20 AM
9. ### SEM - total variance explained by model?

Question #1: Is there any way to calculate the total amount of variance explained by an SEM model? My committee seems to think there is and they...

• Replies: 12
• Views: 8,605
06-17-2014, 01:50 AM
10. ### Violating ANCOVA "Homogeneity of Regression of Slopes"

Hi all, I am working on a publication where I ran a 3-way mixed design ANCOVA. For one of my between-subjects IVs (gender) I found a significant...

• Replies: 0
• Views: 2,565
06-16-2014, 06:29 PM
11. ### Interrater Reliability. Is MORE better?

Which design is more powerful: testing interrater reliability with 2 judges or 4 judges? (citations appreciated)

• Replies: 3
• Views: 1,533
06-16-2014, 01:37 PM
12. ### Interaction effect not significant, but graph indicates otherwise...

For my thesis I had two hypotheses regarding moderator/interaction effects: h1: Exisiting game experience (dependent, continous) moderates the...

• Replies: 8
• Views: 2,205
06-15-2014, 01:44 AM
13. ### Principal component analysis - problems with input data

Hello everyone. As the title suggests, I have a problem with figuring out what data exactly to feed my PCA. The situation: I have a certain number...

• Replies: 0
• Views: 1,068
06-14-2014, 04:40 PM
14. ### Analysis question

My analysis is a 2 X 2 , looking at the influence of gender (male, female) & SES (middle class, poor) of a job candidate on how he is evaluated for a...

• Replies: 0
• Views: 1,010
06-14-2014, 02:27 PM
15. ### Determining the right statistical test

• Replies: 0
• Views: 1,266
06-12-2014, 12:10 PM
16. ### Experiment design

Hi I am designing an experiment for school and I don't know how best to describe the factorial design. I have three conditions, and I will be...

• Replies: 3
• Views: 1,304
06-12-2014, 10:16 AM
17. ### statistical symbols in microsoft word

I've spent like 5 hours trying to figure out how to insert a bar (called overstrike or overline) over a word ... like the bar that goes over x for...

• Replies: 5
• Views: 3,618
06-09-2014, 11:33 PM
18. ### How to analyse..?

Hi, I have a problem to choose a method for analysing data from my experiment. I have one within-subjects (all four stimuli presented to every...

• Replies: 0
• Views: 1,129
06-06-2014, 07:03 PM
19. ### Preacher&Hayes Process macro

Hello friends! We are interested in the relationship of x on y, mediated by m. All variables are dichotomous except for x, which is continuous....

• Replies: 1
• Views: 2,574
06-06-2014, 04:10 PM
20. ### Could really use some advice for my thesis!

So I'm almost done with my thesis but I'm struggling with my last hypothesis. Some background information on my subject: I'm trying to find out what...

• Replies: 3
• Views: 1,626
06-06-2014, 06:26 AM
21. ### Nonparametric/Ranking Data Help!!

Hi all, I am a PHD student attempting to come to grips with an analysis of some recent data. I have a repeated measures design. 220 students were...

• Replies: 0
• Views: 1,002
06-03-2014, 08:22 PM
22. ### Sample size calculation for multiple regression

Hi all! I am struggling with sample size calculations at the minute. I have looked everywhere but all I get is formulas. I have downloaded MedCalc...

• Replies: 0
• Views: 1,745
06-03-2014, 04:58 PM
23. ### Autism behaviour - how to analyse data

I'd like help how to use data on the behaviour of an autistic individual. In my work I'm taking care of an adult male with autism. He's in his...

• Replies: 2
• Views: 1,326
06-03-2014, 03:46 PM
24. ### Question: What type of experimental design do I have here?

I feel a bit unsure and maybe you can help me. I've got the data of a big firm, where there is a population of 1400 administrative personnel...

• Replies: 5
• Views: 1,586
06-03-2014, 11:15 AM
25. ### How to analyze parents' talk when codes are not normal in a mixed design?

This is a but tricky to explain, so I will do my best. I am trying to analyze coded talk by parents for three different categories of objects. I...

• Replies: 1
• Views: 1,185
06-03-2014, 03:06 AM
26. ### HELP with experimental analysis (fear conditioning)

I am running an olfactory fear conditioning procedure in which 2 odors (odor A/ odor B) are either paired with a footshock (CS+) or absence of...

• Replies: 1
• Views: 1,180
06-02-2014, 07:02 AM
27. ### Not sure if i chose the correct statistical test to analyze data

I'm trying to help a friend out with the statistics parts of her bachelors paper. Right now she is still the the planing stages and has not gathered...

• Replies: 0
• Views: 626
05-30-2014, 07:06 AM
28. ### Condensed data vs. raw data. What analyses would be appropriate?

Hello all, I am new to this forum and would greatly appreciate your help. I have two datasets: one dataset is from 1980 and only “processed”...

• Replies: 1
• Views: 1,180
05-29-2014, 01:48 PM
29. ### HELP understanding results and writing discusion

can somebody help me !! I am going crazy haha The third hypothesis predicted that people in a happy mood were more likely to process information...

• Replies: 0
• Views: 959
05-29-2014, 12:57 AM
30. ### Cross-lagged panel size: sample size of 48

I have performed a cross-lagged correlational study with 2 variables and 2 waves. My sample size is 48 subjects. Is it possible to perform it with...

• Replies: 0
• Views: 1,232
Chr
05-28-2014, 12:34 AM

Hello! I've looked all over regarding how to do this but am still coming up short. Please help! I have 16 data points. I have provided the weights!!...

• Replies: 0
• Views: 801
05-26-2014, 05:00 PM
32. ### What correlations to use for ANCOVA assumptions in a 2-group study?

Hi all, I have a question regarding ANCOVA analyses. For my study, I am looking at between group differences on a memory measure that is made...

• Replies: 0
• Views: 873
05-26-2014, 04:52 PM
33. ### Assessing change using McNemar's test

I have Pre and post-intervention test scores of a number of skills rated from 0-3 (0 = Poor, 1 = Fair, 2 = Average, 3 = Good) for 5 participants. I...

• Replies: 4
• Views: 1,268
05-24-2014, 04:41 PM
34. ### Inputting data from my questionnaires for my second year project!

Hello there, I am really struggling with my second year project as I am clueless when it comes to SPSS. So now that i've collected all my...

• Replies: 1
• Views: 1,021
05-24-2014, 01:37 PM
35. ### Is it possible to correlate two latent variables in AMOSwhere one subsumes the other?

Hi all, I suspect that you will think that this is a dumb question, but please bear with me: I am trying to correlate two latent variables using...

• Replies: 0
• Views: 989
05-21-2014, 08:31 PM
36. ### Significance changes when standardizing

Hello guys, I ran some SEM analysis (with MPlus) which gives me some puzzling results: for some paths the significance level is highly different...

• Replies: 2
• Views: 1,701
05-19-2014, 01:53 PM
37. ### Modification Indices

I am struggling with how to interpret some of the modification indices in AMOS SEM output and would appreciate any feedback you can offer! I have...

• Replies: 3
• Views: 12,159
05-18-2014, 04:09 PM
38. ### "contextual effect" vs. "compositional effect" in multilevel models

Chatbox convo follows: 05/16 16:13 Jake: lazar / spunky: when people speak of "contextual effects" in the multilevel / ed psych literature, are...

• Replies: 2
• Views: 7,910
05-16-2014, 06:10 PM
39. ### Use factor weightings derived from previous work on new data?

Hello all, I have tested people on a set of 12 cognitive tests that have been used in previous research (by other people, not me). In the previous...

• Replies: 6
• Views: 1,453
05-16-2014, 03:59 PM
40. ### Trouble Transforming Data to Normality

Hi All, I am trying to transform a variable to normality, but it does not seem to take! Below is the distribution: Clearly there is a...

• Replies: 18
• Views: 3,484
05-16-2014, 03:30 AM
41. ### Pretest - posttest analysis question

I am assessing the learning outcomes for a psychology course using a 10-question multiple choice pretest and, later, the same 10 questions as a...

• Replies: 4
• Views: 1,442
05-15-2014, 07:36 PM
42. ### Repeated measures - correlation

Hi, I've conducted a study in which my participants undergo 4 different manipulations (within-subjects): a negative mood, a positive mood, food...

• Replies: 1
• Views: 1,248
05-14-2014, 09:00 AM
43. ### Cluster Analysis, Discriminant Analysis and Multinomial Logistic Regression - Help!

Hi Everyone, I am having some serious problems with my analyses and was hoping someone might be able to help me out! I have a sample of 95...

• Replies: 1
• Views: 1,954
05-14-2014, 08:58 AM
44. ### Within-subjects Error Bars and Normalization?

Hello, I need to calculate within-subjects error bars to create a graph for my data but I'm having a hard time wrapping my head around how to do...

• Replies: 0
• Views: 3,133
05-13-2014, 01:34 PM
45. ### ANOVA planned contrasts

Dear TalkStats community, Previously a website (http://www4.uwsp.edu/psych/cw/statmanual/plancomp.html) was recommended to me on ANOVA and planned...

• Replies: 0
• Views: 1,221
05-12-2014, 10:57 AM
46. ### Alternatives for logistic regression?

Hey everyone! I need some help because I am not really happy with the data analysis for my thesis. I am investigating the prognostic power of...

• Replies: 0
• Views: 889
05-11-2014, 09:23 AM
47. ### Resolving recoding issues for variables across time and space for a larger dataset

For the paper I am working on I am claiming that as protester 'powerlessness' increases so does the likelihood of the protester selecting a...

• Replies: 0
• Views: 900
05-08-2014, 09:58 PM
48. ### Mediation/Moderation, entrepreneurship, health and work satisfaction

Hi people! I'm currently working on my thesis in organizational psychology, and I could really use some help in the SPSS analysis. My thesis is...

• Replies: 4
• Views: 1,404
05-07-2014, 06:38 AM
49. ### Analyzing Group Differences -ANOVA with a non-continuous DV?

Hello All, I want to analyze group differences among 4 different levels of an IV with one DV. The issue is, when I created the survey the item I...

• Replies: 3
• Views: 1,518
05-06-2014, 08:16 AM
50. ### Case Studies of Hypothesis Testing

Can anyone help me out here? I am totally lost! You are running a series of statistical tests in SPSS using the “standard” criterion for rejecting...

• Replies: 3
• Views: 3,127
05-05-2014, 04:45 AM
51. ### Cross-Level Moderation

Hi everyone, for my master thesis I have to carry out an analysis where both the IV and DV are on the team level while the hypothesized moderator...

• Replies: 0
• Views: 1,411
05-05-2014, 03:40 AM
52. ### Counterbalancing Booboo

Hello, Being a novice researcher, I completely neglected to do a very basic procedure for a brief measure which I created: counterbalancing its...

• Replies: 3
• Views: 1,231
05-04-2014, 07:44 PM
53. ### More help please! I'm almost there!

Question 10 You are running a series of statistical tests in SPSS using the “standard” criterion for rejecting a null hypothesis. You obtain the...

• Replies: 2
• Views: 5,299
05-03-2014, 09:24 PM
54. ### Help with understanding CFA...

I hope someone can give me some pointers here... Or just point out to my muddled mind the porobably obvious things I am missing! I am running an...

• Replies: 1
• Views: 978
05-01-2014, 06:31 PM
55. ### Help with confidence interval and interpreting data!?

Someone please please help me make sense of these stats! I really need help with interpreting outcome of studies! How do i calculate CIs (no need to...

• Replies: 1
• Views: 904
04-30-2014, 03:32 AM
56. ### Help with non normality distribution. Transformations didn't work. Help!

Hi, new to this forum. I'm writing up my MsC in psychology and I've got problems with my data. The study involved administering questionnaires to...

• Replies: 7
• Views: 1,357
04-29-2014, 02:23 PM
57. ### Single Subject Design

My supervisor has asked about single subject designs in educational settings. I'd never heard of them and wanted to get people's thoughts...

• Replies: 3
• Views: 1,055
04-29-2014, 01:01 PM

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