A study of the validity of discretized analog scaling (Discan)
LE3 .A278 1997
1997
Genest, Myles
Acadia University
Master of Science
Masters
Psychology
Discretized analog (Discan) scaling is a reliable and precise quantitative scaling methodology used to measure an individual's target complaints, feelings, beliefs, attitudes, symptoms or problems such as emotional distress and anxiety. Discan has been shown to be useful for various clinical and research applications. Discan has not been formally tested for validity, however, which is the purpose of the present study. A longitudinal design was used in which thirty-five undergraduate students with elevated levels of anxiety and six clinical participants undergoing anxiety-management therapy were assessed weekly, eight times each. Scores on Discan anxiety and impulsivity scales were compared with scores on the State Trait Anxiety Inventory, State form (STAI-S) and the Basic Personality Inventory-Impulse Expression (BPI-ImE) scales. Results from Pearson's correlations, visual and qualitative analyses of the data provide support for the concurrent and discriminant validity of idiographic Discan scales.
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