The Novaco Provocation Inventory (NPI) is either an 80 or 90 item instrument for assessing anger responsiveness. (in order to maximize the variability, the 90-item version was used in this study) The test consists of brief descriptions of situations of provocation, for which the respondent notes the degree of anger that he/she might experience if that event should occur in his/her life. The ratings are on a 5-point Likert-type scale. The main purpose of the NPl is to gauge the range and intensity of a person's anger. Three groups of inmates from a state prison were selected and grouped on the basis of whether this was a first incarceration, a second incarceration, or a third incarceration. Each man took the NPl and the results were as follows: First Second Third
223 347 297
202 319 310
241 310 290
234 320 335
266 330 320
240 300 290
292 290 315
237 337 310
176 310 337
201 315 290
229 290 300
225 295 330
147 327 310
149 290 300
210 320 317
319 335 320
278 290 300
266 310 247
176 287 310
Test the hypothesis that anger is a function of the number of incarcerations. If the F is significant, follow it with a Tukey. If the Levene’s test is violated, simply indicate it is untenable and proceed with the analysis.