Network Intelligence Studies Volume V, Issue 9 (1/2017) 33 Florin-Alexandru LUCA "Gheorghe Asachi" Technical University of Iasi, Romania CMTM – Economics and Marketing Department Claudia Ioana CIOBANU "Gheorghe Asachi" Technical University of Iasi, Romania CMTM – Economics and Marketing Department Magdalena DANILET ”Alexandru Ioan Cuza” University of Iași Faculty of Economics and Business Administration A RELIABILITY TEST USED FOR THE DEVELOPMENT OF A LOYALTY SCALE Original Research Keywords Loyalty, Measurement scale, Reliability JEL Classification M30 Abstract The development of a loyalty model involves the construction of a proper research instrument. For the loyalty model of the clients for financial services, the pre-testing of the research questionnaire represents a significant stage. This article presents the methodology used in this stage for testing the reliability of a loyalty scale. Firstly, this implies choosing the appropriate scales for each variable included in the suggested research model. Secondly, the internal consistency for each of these scales is measured as an indicator of their reliability. The reliability analysis described represents an essential stage in building a measurement instrument for a loyalty model.