Abstract
Using both group (nomothetic) and individual (idiographic) approaches to measuring clinical change may provide more information about the effectiveness of an intervention than either approach alone. The current study re-examined previously published data from two randomized clinical trials of omega-3 fatty acids and Individual-Family Psychoeducational Psychotherapy as treatment for mood disorders in youth, using modified Brinley plots, a method of illustrating individuals' treatment response in the context of group information. Although the original nomothetic approach provided information about the average effect of treatment, modified Brinley plots gave more information about individual children's outcomes. Practicing clinicians in particular could use modified Brinley plots to track treatment trajectories and outcomes for specific clients and subsequently use these data to inform treatment planning.