A SHORTENED VERSION OF THE ACHIEVEMENT MOTIVE SCALE – MOP-20
A SHORTENED VERSION OF THE ACHIEVEMENT MOTIVE SCALE – MOP-20

Summary/Abstract: This research was focused on reducing the scale measuring the general achievement motive MOP2002. The initial version of the instrument MOP2002 contains 55 items and is in the Likert- type scale format. The starting point of this research was based on the assumption about a four-factor structure of the general achievement motive established in our previous research. Both quantitative and qualitative studies were applied in the process of reduction. Each of these studies was conducted on a separate sample – exploratory factor analysis N = 2846, and confirmatory factor analysis N = 294 – and four focus groups, each including 15 respondents. Based on the obtained results, 20 items were selected, and they comprise a shortened version of the scale called MOP20. Designed in this way, the scale can also take the form of the observation protocol while assessing the general achievement motive. It was ascertained that the instrument had a unique object of measurement. The factor analyses results showed the stability of the four-factor structure of the achievement motive. The parameters of representativeness, reliability and homogeneity indicate that MOP20 possesses satisfactory psychometric properties. Instrument validity was checked by means of correlational analysis of the general achievement motive and dimensions of time perspective, self-efficacy and locus of control. The obtained correlation coefficients indicate a satisfactory validity of the scale MOP20, and are highly interpretable when explaining and considering the psychological space of the factors significant for achieving success in activities such as sports and entrepreneurship.

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