PSYCH 255 Final Exam questions with correct answers

Cross-sectional method Answer Persons of different ages are studied at only one point in time. Longitudinal Method Answer The same group of people is observed at different points in time as they grow older. Nominal Scale Answer Variables have no numerical, qualitative properties. The levels are simply different categorical groups Ordinal Scale Answer Levels exhibit minimal qualitative distinctions. We can rank order of the levels of the variable being studied from lowest to highest Interval Scale Answer Have much more detailed qualitative properties. The intervals between the levels are equal in size. There is no absolute zero. Ratio Scale Answer Variables have both equal intervals and an absolute zero Ex. time, weight, length Null Hypothesis Answer The independent variable has no effect Research Hypothesis Answer Independent variable did have an effect Conceptual Replication Answer The use of different procedures to replicate a research finding.