APPENDIX B

SPSS Syntax

* Syntax for two-predictor Poisson regression. 
GENLIN y WITH gender sensation 
/MODEL gender sensation INTERCEPT=YES DISTRIBUTION=POISSON LINK=LOG 
/CRITERIA LIKELIHOOD=KERNEL 
/SAVE MEANPRED DEVIANCERESID STDDEVIANCERESID LEVER AGE COOK. 

* Syntax for Figure 4. 
GRAPH 
/SCATTERPLOT(BIVAR)=MEANPRED WITH DEVIANCERESID 
/MISSING=LISTWISE. 

* Syntax for index plot of leverage. 
GRAPH 
/SCATTERPLOT(BIVAR)=CASE WITH LEVERAGE 
/MISSING=LISTWISE. 

* Syntax for two-predictor overdispersed Poisson regression. 
GENLIN y WITH gender sensat 
/MODEL gender sensat INTERCEPT=YES DISTRIBUTION=POISSON LINK=LOG 
/CRITERIA SCALE=DEVIANCE LIKELIHOOD=KERNEL 
/SAVE MEANPRED DEVIANCERESID.