ACADEMIA Letters The moderating infuence of the general life history strategy factor upon the relation between short-term and long-term mating orientations is mediated by a strategic diferentiation-integration factor Aurelio José Figueredo, Department of Psychology, University of Arizona Mateo Peñaherrera-Aguirre, Department of Psychology, University of Arizona In the early nineties, Gangestad and Simpson developed the Sociosexual Orientation Inventory (SOI) to examine the inclination of individuals towards casual sexual relationships (Gangestad & Simpson, 1990; Simpson & Gangestad, 1991). Even though the authors originally envi- sioned the SOI as an instrument measuring a single general dimension, other researchers have proposed a multidimensional approach to sociosexuality (Jackson & Kirkpatrick, 2007; Banai & Pavela, 2015). For example, Jackson and Kirkpatrick (2007) created the MSOI as an alter- native measure to Gangestad and Simpson’s SOI. In contrast to the original instrument, the MSOI disaggregated the SOI unitary scale into short-term mating (STM) and long-term mating (LTM) scales. Although Jackson & Kirkpatrick reported that the Multidimensional Sociosex- ual Orientation Inventory (MSOI; 2007) featured two “independent” dimensions (STM and LTM), subsequent psychometric studies (e.g., Figueredo, Cuthbertson, Kaufman, Weil, & Gladden, 2012) have identifed a moderate negative correlation (e.g., r = -.36) between these two MSOI components. These results, however, does not support the presence of a unitary sociosexuality factor, although they might support a higher-order construct. Additional ex- aminations assessing these constructs’ discriminant and convergent validity have also found support for the purported relative autonomy, although not complete independence, between STM and LTM (Simpson, Wilson, & Winterheld, 2004; Webster & Bryan, 2007). Conse- quently, the psychometric evidence indicates that while both STM and LTM are correlated, Academia Letters, August 2021 Corresponding Author: Aurelio José Figueredo, ajf@arizona.edu Citation: Figueredo, A.J., Peñaherrera-Aguirre, M. (2021). The moderating infuence of the general life history strategy factor upon the relation between short-term and long-term mating orientations is mediated by a strategic diferentiation-integration factor. Academia Letters, Article 3433. https://doi.org/10.20935/AL3433. 1 ©2021 by the authors — Open Access — Distributed under CC BY 4.0