FPR
Status Preference
Class: II - Sexual Selection
EPA Total Score: 4 /100
Ellis, B. J. (1998). The partner-specific investment inventory: An evolutionary approach to individual differences in investment.
Abstract: This research advances an evolution-based model of the function and content of investment in romantic relationships. In developing this model, theory testing has proceeded concurrently with the validation of a multidimensional measure of partner-specific investment (PSI). Ten strategies of investment were identified through factor analysis and scaled to form the PSI Inventory. These scales form a diverse set of investment measures that are reasonably independent, internally consistent, and reliable across raters. Both gender and sociosexual orientation predict use of specific PSI strategies. Overall PSI scores correlate positively with partner’s feelings of love and felt security in the relationship, correlate negatively with degree of sexualizing of others by partner, and do not correlate with the self’s performance of mate retention behaviors. It is concluded that the PSI Inventory possesses adequate psychometric properties and satisfactory convergent, discriminant, and incremental validity, thus suggesting that it constitutes a viable means of assessing individual differences in investment. These investigations show how a multidimensional, adaptationist approach to investment can further our understanding of these individual differences.
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Supporting Evidence
10/100
Submitted by DJGlass
10/100
Submitted by DJGlass
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Supporting Evidence is evidence that suggests that this trait is an Evolved Psychological Adaptation (EPA) - i.e., that it has been shaped by natural selection to solve a particular adaptive problem.
Challenging Evidence
0/100
Submitted by DJGlass
0/100
Submitted by DJGlass
No one has (yet) rated this source as containing any challenging Medical evidence for this EPA.
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Challenging Evidence is evidence that suggests that this trait is not an EPA - e.g., that it is a product of cultural learning or genetic drift, or maybe it does not exist at all. However over each line of evidence for a description.