A number of studies using the ___________ have found an association between hostility and increased risk of heart disease.

A) The Anger Interview
B) Cook-Medley Hostility Scale
C) Turner Interruption Test
D) Stroop Colour-Word Conflict Test
E) Structured Interview

The best choice for the blank is the Cook-Medley Hostility Scale, as it specifically measures levels of hostility in individuals. Studies using this scale have consistently found a correlation between high levels of hostility and an increased risk of heart disease. The other options listed are not specific to measuring hostility and have not been directly linked to heart disease risk in research.