User Guide

541
Reliability An
alysis
Hotelling’s T-square. Produces a multivariate test of the null hypothesis that all items
on the scale have the same mean.
Tukey’s tes
t of additivity.
Produces a test of the assumption that there is no
multiplicative interaction among the items.
Intraclass correlation coefficient. Produces measures of consistency or agreement
of values wi
thin cases.
 Model. Sel
ect the model for calculating the intraclass correlation coefficient.
Available models are Two-way mixed, Two-way random, and One-way random.
Select two-way mixed when people effects are random and the item effects are
fixed, two
-way random when people effects and the item effects are random, and
one-way random when people effects are random.
 Type. Select the type of index. Available types are Consistency and Absolute
Agreement.
 Confidence interval. Specify the level for the confidence interval. Default is 95%.
 Test value. Specify the hypothesized value of the coefficient for the hypothesis
test. This
is the value to which the observed value is compared. Default value is 0.
RELIABILITY Command Additional Features
The SPSS command language also allows you to:
 Read and analyze a correlation matrix.
 Write a correlation matrix for later analysis.
 Specify splits other than equal halves for the split-half method.
See the SPS
S Command Syntax Reference for complete syntax information.