Exploratory Factor 0.0 / 5 ? PsychologyExploratory FactorUniversityNone Created by: frankie_1212Created on: 31-07-18 12:46 What is another name for Exploratory factor analysis? Principal components Analysis 1 of 27 What is exploratory factor analysis? It is a mathematical technique by which patterns of correlations can be explained by a number of variables 2 of 27 What is an example of latent variables? Not directly observed, cannot be directly measured: Eg: cognitive ability 3 of 27 What does Exploratory factor analysis find? Simple structure 4 of 27 What are the pre-analysis checks? Correlation matrix (RMatrix), sample size, number of items, factor extraction, rotation, naming 5 of 27 Why are some sample size pre conditions needed? Because correlations coefficient are less reliable for small samples 6 of 27 What is the number of participants to items? 5:1, absolute minimum 100 7 of 27 What are the number of items to factors? 4:1 8 of 27 What are the number of subjects to factors? 6:1 9 of 27 What is the first statistical check? Sampling adequacy 10 of 27 Kaiser Meyer Olkin >.5 11 of 27 What are the two types of matrices? R-Matrix and Identity matrix 12 of 27 What are the three components of variability? Unique, common(Shared with other variables) and error 13 of 27 What is communality? Proportion of variance explained by extracted factors, a measure of common variance 14 of 27 What is communality and sample size? All communalities >.6: N>100 15 of 27 What happens if there are .5 communalities? Only a few factors: N {100,200} 16 of 27 What happens if there are less than <<.5 and many factors? N>500 17 of 27 What are three commonly used ways to extract factors? K1 rule, Scree test, Parallel analyssi 18 of 27 What are eigen values? Measure of the variance explained by a factor 19 of 27 What is assumed? Eigenvalue are a measure of the variance explained by a factor 20 of 27 What is a scree plot? Eigenvalues against the component number 21 of 27 What did Cattell argue? Cut off point should be before the point of inflexion 22 of 27 What is parallel analysis? Generate a set of random eigenvalues given N (Number of pps) and P (number of items) 23 of 27 What is orthogonal rotation? Factors are not correlated with eachother, varimax rotation is one kind of orthogonal rotation 24 of 27 What is oblique rotation? Factors are correlated with eachother 25 of 27 What is one kind of oblique rotation? Direct oblimin rotation 26 of 27 What is considered a cross loader? Any loading greater than .3 27 of 27
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