he initial sample included 391 undergraduate respondents;
however, after applying the criteria of influential data points to
identify outliers (Stevens, 1984), 14 influential outliers were detected
and their data points were excluded. The remaining respondents
were 377 undergraduates who were enrolled during the Fall,
2007 and Spring, 2008 semesters at the University of Texas at
Arlington. They included 107 men (71 freshmen and 36 sophomores)
and 270 women (187 freshmen and 83 sophomores). Proportions
based on ethnic backgrounds were 50.7% White/Anglo-
American, 13.8% Black/African-American, 15.6% Asian, 0.3% Native
American or Alaskan Native, 0.3% Pacific Islander, and 19.4% other/
multiracial. Proportions based on ages were 47.2% 16–18 years old,
49.8% 19–21 years old, 1.6% 22–24 years old, 0.8% 25–27 years old,
and 0.6% 28–30 years old.