Measuring the closeness of relationships: a comprehensive evaluation of the 'Inclusion of the Other in the Self' scale

Gächter, Simon and Starmer, Chris and Tufano, Fabio (2015) Measuring the closeness of relationships: a comprehensive evaluation of the 'Inclusion of the Other in the Self' scale. PLoS ONE, 10 (6). e0129478. ISSN 1932-6203

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Abstract

Understanding the nature and influence of social relationships is of increasing interest to behavioral economists, and behavioral scientists more generally. In turn, this creates a need for tractable, and reliable, tools for measuring fundamental aspects of social relationships. We provide a comprehensive evaluation of the 'Inclusion of the Other in the Self' (IOS) Scale, a handy pictorial tool for measuring the subjectively perceived closeness of a relationship. The tool is highly portable, very easy for subjects to understand and takes less than 1 minute to administer. Across our three online studies with a diverse adult population (n=772) we show that six different scales designed to measure relationship closeness are all highly significantly positively correlated with the IOS Scale. We then conduct a Principal Component Analysis to construct an Index of Relationship Closeness and find that it correlates very strongly (ρ=.85) with the IOS Scale. We conclude that the IOS Scale is a psychologically meaningful and highly reliable measure of the subjective closeness of relationships.

Item Type: Article
Schools/Departments: University of Nottingham UK Campus > Faculty of Social Sciences > School of Economics
Identification Number: https://doi.org/10.1371/journal.pone.0129478
Depositing User: Gaechter, Simon
Date Deposited: 17 Jun 2015 07:26
Last Modified: 15 Sep 2016 03:14
URI: http://eprints.nottingham.ac.uk/id/eprint/29121

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