Directions: For the following excerpt,

(1) Decide whether the sampling method(s) presented are probability or non-probability;

(2) State the specific type of probability or non-probability sampling method(s) used;

(3) State your rational for the sampling method the researcher selected.Some of the examples might include more than one sampling method to obtain the study sample; and

(4) Discuss data gathering bias and haw it can impact the study out comes. Can bias be eliminated?

Study Excerpt:

"Subjects were recruited through advertisements placed in various newspapers in Lexington, Kentucky . . . . Individuals reporting any past or present drug- or alcohol-related problems, serious head injuries, learning disabilities, or psychotic symptomatology were excluded from participation. "Giancola, P.R. (2004), Difficult temperament, acute alcohol intoxication, and aggressive behavior.Drug and Alcohol Dependence, 74(2), 135-45.Excerpt from page. 136.