Small-n Designs

Small-n Designs Systematic examination of behavior in one or a few individuals before and after treatment/intervention

Key Terms Baseline Stage Treatment Stage Observations made prior to an intervention Treatment Stage Observations made following an intervention Phase Change Involves changes in the administration of intervention

LEVEL OF ANXIETY Baseline Phase Treatment Phase Phase Change

Level A data pattern where a series of measurements are at the same magnitude Levels Level Of Anxiety

Trend Measurement A data pattern where series of measurements are in the same direction Measurement TRENDS Measurement

Interpreting Data Change in Mean Change in Level Change in Trend

Interpreting Data Change in Mean Change in Mean M = 8.02 M = 4.50 LEVEL OF ANXIETY M = 8.02 M = 4.50

Interpreting Data Change in Level Change in Mean Change in Level LEVEL OF ANXIETY Change in Level

Interpreting Data Change in Trend Change in Mean Change in Level

A-B-A-B Design Where treatment and measurement are systematically altered to assess change A = Baseline Phase B = Treatment Phase ... A B A

ABAB Design

Multiple Baseline Design Where multiple baselines are established across situation or individual or behavior

The Good, The Bad ... Advantages Research in applied settings Flexible Disadvantages External Validity Absent...statistically