Convergent and Discriminant Validity of Opinion Leadership
Multitrait-Multimethod Analysis Across Measurement Occasion and Informant Type
Abstract
Influential individuals who shape the attitudes and behaviors of their peers are termed opinion leaders. The interpretability of research on opinion leadership, however, has frequently been hampered by the use of divergent instruments that follow either a domain-specific view of opinion leadership or a more domain-independent trait conceptualization. In two studies, multitrait-multimethod matrices are analyzed regarding the convergent and discriminant validity of both approaches. Study I (N = 407) demonstrates the stability of the opinion leadership scales over time and their discriminant validity to established measures in personality (e.g., extraversion) and attitudinal research (e.g., involvement). Study II (N = 185) replicates these results in the form of a multitrait-multiinformant design, demonstrating high convergence of self- and peer-assessments. However, different operationalizations of domain-independent opinion leadership displayed limited convergent validity, indicating that they capture different, albeit related, traits.
References
(2007). On tests and indices for evaluating structural models. Personality and Individual Differences, 42, 825–829.
(1986). Assessment of the psychometric properties of an opinion leadership scale. Journal of Marketing Research, 23, 184–188.
(2005). Market mavens: Psychological influence. Psychology & Marketing, 22, 289–312.
(1964). The nature of belief systems in mass publics. In , Ideology and discontent (pp. 206–261). New York: Free Press.
(1987). The market maven: A diffuser of marketplace information. Journal of Marketing, 51, 83–97.
(1999). A short reliable measure of subjective knowledge. Journal of Business Research, 46, 57–66.
(1996). Opinion leadership and opinion seekers: Two new measurement scales. Journal of the Academy of Marketing Science, 24, 137–147.
(2011). Evaluation of measurement precision with Rasch-type models: The case of the short Generalized Opinion leadership Scale. Personality and Individual Differences, 50, 53–58.
(2006). The international personality item pool and the future of public-domain personality measures. Journal of Research in Personality, 40, 84–96.
(2006). Congeneric and (essentially) tau-equivalent estimates of score reliability. Educational and Psychological Measurement, 66, 930–944.
(2000). A field experiment testing frontline opinion leaders as change agents. Journal of Applied Psychology, 85, 987–995.
(1944). The people’s choice: How the voter makes up his mind in a presidential campaign. New York: Duell, Sloan & Pearce.
(2006). Testing differences between nested covariance structure models: Power analysis and null hypotheses. Psychological Methods, 11, 19–35.
(1991). A revised product involvement inventory: Improved usability and validity. Advances in Consumer Research, 9, 108–115.
(1957). Social theory and social structure. Glencoe, IL: Free Press.
(1996). The five factor model and market mavenism. Advances in Consumer Research, 23, 260–263.
(1983). Persönlichkeitsstärke [
Personality strength ]. Hamburg: Spiegel-Verlag.(1962). Methods of measuring opinion leadership. Public Opinion Quarterly, 26, 435–441.
(2007). Innovativeness, exploratory behavior, market mavenship, and opinion leadership: An empirical examination in the Asian context. Psychology & Marketing, 24, 703–722.
(2006). The effects of parceling unidimensional scales on structural parameter estimates in structural equation modeling. Structural Equation Modeling, 13, 566–586.
(2005). Finanz-Meinungsführer [
Opinion leaders in finance ]. Hamburg: Spiegel-Verlag.(1997). The rediscovery of opinion leaders. An application of the personality strength scale. Communications, 22, 5–30.
(2005). A note on testing perfect correlations in SEM. Structural Equation Modeling, 12, 551–557.
(2007). Identifying opinion leaders to promote behavior change. Health Education & Behavior, 34, 881–896.
(2006). The effect of the number of opinion seekers and leaders on technology attitudes and choices. Human Communication Research, 32, 322–350.
(1991). The influentials: Back to the concept of opinion leaders? Public Opinion Quarterly, 55, 267–279.
(2007). Looking for opinion leaders: Traditional vs. modern measures in traditional societies. International Journal of Public Opinion Research, 19, 173–190.
(1985). Hierarchically nested covariance structure models for multitrait-multimethod data. Applied Psychological Measurement, 18, 1–26.
(2009). Opinion leadership and social influence in online environments. Unpublished doctoral dissertation, University of Erlangen-Nürnberg.
