New 28-Item and 12-Item Dog Owner Relationship Scales: Contemporary Versions of the MDORS with a Revised Four-Component Structure.

Numerous scales have been developed to assess pet-owner relationship quality. One commonly used measure is the Monash Dog Owner Relationship Scale (MDORS) and its various derivatives. Since this scale was published in 2006, many social changes have occurred, necessitating a review and, if necessary, refinement of this measure. We sought to investigate the internal consistency and structure of the existing instrument, as well as an expanded and modified version of the scale, in a contemporary adult sample of over 350 adults, recruited to be potentially less dog-centric than previous samples. The existing three-factor structure of the MDORS appeared reasonably sound, but a Principal Components Analysis with modified items resulted in identification of a four-component structure. Two of the components approximated existing MDORS measures: the Perceived Costs of Dog Ownership and the owner's Emotional Reliance on their pet. Rather than replicating the existing Pet Owner Interaction subscale, however, we identified two different types of engagement: Affectionate Engagement and Active Engagement. The subscale scores and the total score were, as expected, intercorrelated with each other and with the Lexington Attachment to Pets Scale. Perhaps surprisingly, however, they were statistically associated with very few demographic variables, such as owner gender, age, education, or residence location, and they were rarely associated with dog variables such as age, sex, or source. This may speak to the current near-universality of strong human-dog relationships, which we propose can now be assessed using two new measures: the Dog Owner Relationship Scale 28 (DORS28) and a shortened version, the Dog Owner Relationship Scale 12 (DORS12).