title 'slide 38 higher-order factor'.
matrix data var= v1 to v4 /format =free full  /contents=corr.
begin data	 
1.000	.354	.378	.408	 
.354	1.000	.401	.433	 
.378	.401	1.000	.463	 
.408	.433	.463	1.000	  
end data.

FACTOR
  /matrix=in (cor=*) /ANALYSIS v1 to v4
  /PRINT INITIAL EXTRACTION
  /CRITERIA  ITERATE(25) 
  /EXTRACTION ml
  .