“…Therefore, a loyal consumer is defined by his or her frequent purchases of and positive attitude toward a brand (Assael, 1987;Day, 1969;Frisou, 2005). In one of the most common definitions of brand loyalty, Jacoby and Kyner (1973) suggest six criteria: Loyalty is a biased, behavioral response, expressed over time, by some decision-making unit, with respect to one or more alternative brands, which is a function of psychological processes. Later authors (Dick and Basu, 1994;Oliver, 1997) also insisted on the effect of commitment effect, such that loyalty must be composed of the full spectrum of cognitive, affective, and conative dimensions, which cause ''repetitive same-brand or same brand-set purchasing, despite situational influences and marketing efforts having the potential to cause switching behavior'' (Oliver, 1999, p. 34).…”