An objectively verifiable indication that an animal has pair-bonded would be a visible indication of distress when forcibly separated from his/her mate. I’m not suggesting that this is the best way to determine whether an animal has pair-bonded. For example, an elevated level of some hormone in the blood stream (a “being in love” hormone) that reliably indicates being pair-bonded would be a superior objectively verifiable indication (in my opinion) because it doesn’t involve causing distress in an animal.
I’m not a biologist—just an occasional recreational reader of popular works in biology. So, my opinion isn’t worth much.
Right now, it seems that “passionate love” is measured in a discrete scale based on answers to a questionnaire. The “Passionate Love Scale” (PLS) is mentioned in this blog post and was introduced by this article in 1986.
In my other reply to my original comment I showed a study%20Reduced%20cognitive%20control%20in%20passionate%20lovers.pdf) that finds that “high levels of passionate love of individuals in the early stage of a romantic relationship are associated with reduced cognitive control”, in which they use the PLS.
An objectively verifiable indication that an animal has pair-bonded would be a visible indication of distress when forcibly separated from his/her mate. I’m not suggesting that this is the best way to determine whether an animal has pair-bonded. For example, an elevated level of some hormone in the blood stream (a “being in love” hormone) that reliably indicates being pair-bonded would be a superior objectively verifiable indication (in my opinion) because it doesn’t involve causing distress in an animal.
I’m not a biologist—just an occasional recreational reader of popular works in biology. So, my opinion isn’t worth much.
Right now, it seems that “passionate love” is measured in a discrete scale based on answers to a questionnaire. The “Passionate Love Scale” (PLS) is mentioned in this blog post and was introduced by this article in 1986.
In my other reply to my original comment I showed a study%20Reduced%20cognitive%20control%20in%20passionate%20lovers.pdf) that finds that “high levels of passionate love of individuals in the early stage of a romantic relationship are associated with reduced cognitive control”, in which they use the PLS.