Newsom
Psy 495 Psychological Measurement, Spring 2017 1
SPSS Reliability Example
Menus
To obtain descriptive statistics, such as mean, variance, skew, and kurtosis.
Analyze Descriptive Statistics Descriptives
Click the Options button, and check “Variance” under Dispersion and “Kurtosis and Skewness” under
Distribution. Drag over the desired variables
To obtain frequency histograms
Analyze Descriptive Statistics Frequencies
Drag over the desired variables. Click the Charts button, and then check “Histograms” and “Show normal
curve on histogram”
To obtain Cronbach’s alpha and item statistics
Analyze Scale Reliability Analysis
Drag over the desired variables. Click the Statistics button and check “Item,” “Scale,” and “Scale-if-item-
deleted” under Descriptives; check “Correlations” under Inter-Item, and “Means and Correlations” under
Summaries
Syntax
*Example of Cronbach's alpha.
get file='c:\jason\spsswin\negex\wave1\wave1.sav'.
*Get file retrieves data file, but can open with windows
* This location is default location of downloads on lab comptuers
get FILE='C:\Users\newsomj\Downloads\ias.sav'.
*use EXECUTE. *afterward or a statistical procedure to execute get file command.
*I did not need a recode, so the following example is commented out.
* recode q4 q5 q10 (1=7) (2=6) (3=5) (4=4) (5=3) (6=2) (7=1) into q4r q5r q10r.
frequencies vars= w1unw1 w1unw2 w1unw3 w1dwn1 w1dwn2 w1dwn3 w1out1
w1out2 w1out3 w1fai1 w1fai2 w1fai3
/histogram=normal.
descriptives vars=w1unw1 w1unw2 w1unw3 w1dwn1 w1dwn2 w1dwn3 w1out1
w1out2 w1out3 w1fai1 w1fai2 w1fai3
/statistics=default variance skew kurtosis.
reliability variables=w1unw1 w1unw2 w1unw3 w1dwn1 w1dwn2 w1dwn3 w1out1
w1out2 w1out3 w1fai1 w1fai2 w1fai3
/scale(nse)=w1unw1 to w1fai3
/statistics=correlations scale
/summary=means corr total.
Output
