Psyc460 exam Flashcards
(53 cards)
Control for familywise error in planned comparisons
Desired familywise error divided by number of planned comparisons.
What is the variance
covariance of a variable with itself
ss treatment - ss contrast =
ss residuals
Three rules of contrast coding
compare negative and positive
sum to 0
If a variable isn’t in a contrast code it as 0.
What is the equivalent of r squared in anova
partial eta squared
Type I error
1 - alpha
Type II error
alpha
Familywise error
(1 - alpha) ^c
Per comparison error rate
alpha
What is chi square
A measure of discrepancy
What does chi square change mean
A lower chi square change means the model is an improvement in fit.
What is AIC / BIC
Model comparison statistics for CFA, EFA and SEM
with non-nested models
Advamtages of SEM vs. path analysis
less restrictive assumptions, inclusion of latent variables, models measurement error
What methods test for omitted errors
None
Formula for calculating number of values in variance, co variance matrix
p(p+1_ /2
Formula for centreing around the mean
x = raw - mean
Dummy coding for ANOVA
a. k-1=j b. k-1=j interaction: j x j
what do straight lines mean in path diagrams
causal direct effects
what do curved lines mean in path diagram
covariance. No causal links.
Out of FA or SEM which one has causal effects.
SEM
Calculating degrees of freedom
no. of parameters - values in covariance-variance matrix
Calculating no. of parameters in SEM model
errors + loadings + covariance
What are examples of non-nested models
CFA, EFA, SEM
What are examples of nested models
t tests. ANOVA, ANCOVA
