Measuring the Involvement Construct

SUMMARY The purpose of the study was to develop a scale tomeasure the construct of involvement. Hence, a se-mantic differential scale was developed to capture theconcept of involvement for products. This Personal In-volvement Inventory was developed over four data setsof 268 undergraduate psychology students; two data setswith 49 MBA students; and two data sets with 57 clericaland administrative staflf members. The scale was dem-onstrated to have content validity by expert judges attwo phases of the scale development: first, for the se-lection of items, and second, through classification ofopen-ended responses from subjects. The reliability orstability of the scale over time was checked over twosubject populations for an average test-retest correlationof 0.90. The criterion-related validity of the scale waschecked by demonstrating agreement with the order ofvarious products as found in previous studies. The con-struct validity—the test ofthe scale to theoretical prop-ositions—was then carried out. The scale was admin-istered to clerical and administrative staff and coveredthree different product categories and several statementsof behavior proposed to be representative of involve-ment. Over all three product categories there was a pos-itive relationship between the scale scores and the sub-jects' responses to the statements of theoretical prop-ositions pertaining to involvement.