Q1) a) Categorize according to most descriptive or definitive category of research strategies (i.e., experiments, naturalistic observations, surveys, case-control studies, cohort studies, quasi-experiments, longitudinal vs. cross-sectional studies, matched design, retrospective vs. prospective studies, time-series, single-subject studies).

b) Recognize features of study that prompted your classification.

c) Recognize the IV, DV, and other variables, if suitable.

d) Recognize and describe potential threats (up to 3) to internal validity.

e) Recognize and explain potential threats (up to 3) to external validity.

f) Recognize strategies that were utilized to control for nuisance variables and minimize threats to valid inference making.

g) What additional strategies (up to 3) you would propose that may increase validity of the findings

In a study of 100 randomly selected college students, it was found that students reported greater depressive symptoms were more likely to drink alcohol and to drink at a higher level.