<p>The SCL-90 is one of the most widely used instruments for psychological evaluation, but its frequency of use has decreased considerably because there are certain inconsistencies concerning its factorial structure. Because of that, many researchers today use one of the abbreviated forms of it. One of these short versions is the SA-45, but this instrument has the same conflicts as the long version. For this reason, the aim of this study was not only to develop a short version with only three items for each factor but also to minimize the correlations of the items concerning the different dimensions of the questionnaire. The sample (N = 361) was collected online and a measure of purification based on the Hofmann complexity index resulted in a substantial improvement in psychometric properties. The resulting instrument has a bifactorial structure, so it can be used, in addition to a <em>global symptoms factor</em>, its six dimensions: <em>phobic anxiety, paranoid ideation, somatization, hostility, depression</em>, and <em>personal insecurity</em>. Despite the briefness of the instrument, internal consistencies obtained favorable values ​​and, in the convergent validity analysis, significant correlations were found with personality traits.</p>