9. Go back and open up the Data Editor by clicking Window on the top line of the screen and click I4 in the Items box back into the Variables box, leaving I1, I2, and I3 in the Items box.

Then, repeat Steps 3–7 above. You will now see, as forecast by the “Alpha if Item Deleted” result, that the Cronbach alpha for this scale does indeed equal .897, which is very good.

We will stop there and say that items 1–3 form a reliable scale to measure Attitudes Toward Iguanas. Here are two hints when running SPSS reliability analysis. All negatively worded items (e.g., “I hate iguanas” for the above scale) should be recoded before running reliability. Use Transform and Recode from top menu. Also, when you have your data entered satisfactorily, it is a good idea to save your data. You might save the above data as “iguanas.sav” for example.