Forum: Psychology Statistics

Hello helpful people, I'm doing my comps exam and I have an issue determining what constitutes a main effect in my design. I will conduct a 3x3...

Hi, I have read all of the examples available but I can't tell which test to use because none of the examples use the kind data that I do! Please...

Hi, I am working on my dissertation and am stuck with the data analysis. :confused: I am dealing with 4 variables, all of which are categorical...

I put this here because I didn't think this was necessarily an SPSS specific question, forgive me if I chose the wrong forum. I had a very large...

Hi everyone, I have collected questionnaire data from a group of 20 trainees and their 20 supervisors on a construct called professionalism (25...

Hi Everybody I am currently writing up my results regarding mediators between insecure attachment and depression. I have used Andrew Hayes...

Hi all, I am doing a multiple regresssion analysis with several temperament scales, birth order (firstborn(age =4) or secondborn(age=2) and...

Hello - I am a phd student in psychology and I would be very grateful for some advice about contrasts. I have conducted a naming experiment for...

We have conducted an experiment that asks respondents to rate whether they thought an article was biased on an 11-point scale, with 0 being biased to...

Can someone please explain to me what a good odds ration is and why? Thanks!

Hello, I'm analyzing the results of an educational research study wherein learners had the opportunity to conduct multiple attempts (trials) at a...

In a 2x2 ANOVA I found a main effect for 1 IV and an interaction effect. I conducted a post hoc simple effects test by using paired sample t-tests...

Hello everyone, I am currently using IRTPro to assess the presence of DIF on a 5-dimension scale (1 general dimension, 4 subscales). It is a graded...

Hi, I have three groups (defined by paranoid ideation level). I am running bootstrapped One Way ANCOVAs due to non-normality (expected for paranoia...

I ran CFA in AMOS, which is a second order confirmatory factor analysis. When I read the result, I found that the standardised regression weights...

Hey people, Im doing a report on the results of a memory recognition study. The experiment involves 178 students being shown a list of 30...

Hiya, since posting I've sorted it all out! Thanks for your help x

I am looking at the relationship between Schizophrenia, Substance Abuse and Neurocognition. I have 30 P's with Schizophrenia and 30...

What are the critical assumptions for EFA and how do you test for them? Here are two examples of the questions I have on this. First, some warn of...

I'm in an introductory research class at my college and have ran a basic experiment testing for word recall ability when using gender associated...

I am a proposing a research topic and want to see if what I propose is possible given the data I have. If not, I would like to hear your ideas on how...

Hi i'm new to the forum and hopefully somebody wants to offer me a bit of advice. I'm carrying out a marketing choice experiment to estimate the...

I have written my psychology results section for my dissertation, I have done a Spearmans rho and a Mann-Whitney to test my hypotheses. I would...

Hi everyone, I'm probably being a bit of a dunce but I can't for the life of me come to a conclusion of which statistical test to use for this...

Hi, I have the following problem. I'm trying to average several normal distributed variables. To make it more easy, I'm using z-scores. The...

I have a complex design: Groups(2) x Repeated Measures(2) = Dependent scores (2). I want to measure effect of groups(treatment). I can use ANOVA...

Hello everyone! Your help will be GREATLY appreciated!!! :tup: I have looked at the effects of perceived social status (working, middle, upper...

1) 2-level variable: I have a 2-level variable "Diagnosis" which represents a continous score (1=below, 2=above a "diagnosis" treshold). I want to...

I'm not sure if it's because I have done something wrong, but firstly my mauchly's sphericity test has a df of 0 and a sig of just ( . ), but than i...

Hello friends! Currently a final-year student, I've collected data for my dissertation project. I've carried out a pilot study with only two...

Hi, I'm comparing two patient groups on a novel language measure (lets call it L1, linear variable). The groups did not differ on a more...

The study we are doing is examining the effect of positive and negative feedback on confidence. We're using a between-groups design with three...

Hello, In my model, I am looking at predictors of a variable, Y. In a path model, Y has 4 significant predictors lets call them A,B, C, and X (path...

Hey, guys. I'm trying to use the National Longitudinal Survey Year 1979 data set in a multiple regression model. The data set has data from...

Hello everyone! Your help is greatly appreciated. I have run a 3 x 2 factor between-participants ANOVA in SPSS, but my analysis yielded no...

Hi guys, Does someone knows the difference between multilevel time series analysis and the time serie ARIMA models etc.; or is it approximately...

Hello friends! Currently a final-year student, I've collected data for my dissertation project but I'm not sure about which statistical test to...

I am currently trying to complete my results section for my dissertation, I am looking at gender differences in attitudes towards domestic abuse. I...

Dear respected members, I'm developing an instrument to measure care dependency in home dwelling elderly. I want to test the validity of the...

Hi :wave:, I have a database that I am using data imputation techniques, but is not a normal matrix to apply a multivariate normal test, my question...

Hi all, I have two groups who made a simple detection task in which reaction times was the only dependent variable (observed in different...

I had a huge explanation and it got deleted, so here's a briefer version: I'm trying to find whether high trait empathy predicts a greater effect...

Hello, I'm trying to figure out which type of ANOVA I'd use in this situation. My question involves 3 different groups with measurements taken at...

For ANOVA effect sizes you report n2 (in the correct format) but what do you do for effect sizes of ANCOVA? is it n2, r or r2??? Please HELP!

Hello, I am a work psychologist and have been asked to evaluate some data as part of my job. I rarely get the opportunity to do something like...

Hi, I have two different scales that measure children's' exposure to family violence. One is based on children's report on a single item, the other...

Just a quick question, which might or might not be interesting. If attempting to estimate paramaters of a multinominal logit model by maximum...

Hi all, I apologise in advance if this is a very easy question - I may be struggling with the wording, or I might just be a bit slow. The...