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Applicability of the Investment Model Scale in a natural‐fertility population
Author(s) -
Winking Jeffrey,
Eastwick Paul W.,
Smith Leigh K.,
Koster Jeremy
Publication year - 2018
Publication title -
personal relationships
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.81
H-Index - 83
eISSN - 1475-6811
pISSN - 1350-4126
DOI - 10.1111/pere.12257
Subject(s) - subsistence agriculture , reliability (semiconductor) , sample (material) , scale (ratio) , indigenous , psychology , fertility , quality (philosophy) , natural fertility , construct (python library) , population , investment (military) , variation (astronomy) , social psychology , demography , geography , sociology , research methodology , computer science , ecology , political science , family planning , cartography , philosophy , law , agriculture , chemistry , archaeology , biology , power (physics) , epistemology , chromatography , quantum mechanics , programming language , physics , politics , astrophysics
Relationship quality is a construct that is central to theories of relationships and one that is used widely by psychologists. However, all prior assessments of relationship quality have derived from samples living in industrialized nation states. Here, the authors expand the breadth of this cultural variation to examine the means, reliability, and structure of the Investment Model Scale (IMS) in a sample from a natural‐fertility, subsistence‐level indigenous population of Nicaragua. Results indicate that the IMS captures real variation in the quality of relationships in this sample, although explorations of internal reliability and structure suggest poorer validity. Possible reasons for this disparity are discussed, including impacts of the necessary alterations to the instrument, as well as cross‐cultural differences in the nature of marriage.