Regardless of attachment style, oxytocin increases in-group favouritism, proclivity to group conflict, envy and schadenfreude. It increases cooperation, trust and so on inside one’s group but it often decreases cooperation with out-groups.
I may not be recalling correctly, but although there is some small studies on that, I do not think there is a lot of evidence that oxytocin always leads anxiety, etc. in people with insecure attachment style. I would suspect that it might be the case it initially increases insecurity because it makes those persons attend to their relationship issues. However, in the long-run it might lead them to solve those issues. I say this because there are many studies showing insecure attachment style is associated with lower oxytocin receptor density. If your hypothesis were correct the density should be (on average) the same. There are also a lot of studies showing a correlation between oxytocin levels and relationship satisfaction, duration and so on. Additionally, intranasal oxytocin increases conflict solution in couples. Again, these would not be the case if your hypothesis were true. Overall there is a lot more evidence that oxytocin does increase secure attachment, although there is a small amount of evidence that, in the short-term, it increases measures associated with insecure attachment.
Perhaps you have already read it, (and it might be a bit outdated by now) but Oxytocin and social affiliation in humans (Feldman, 2012) offers a pretty comprehensive review of oxytocin’s social effects. It will also point you to all the references to what I said above (it’s pretty easy to find).
EDIT: Note: I, and the English dictionary, believe hormetic is the property of having opposing effects at different dosages. Which does not seem to fit what you intended.
Regardless of attachment style, oxytocin increases in-group favouritism, proclivity to group conflict, envy and schadenfreude. It increases cooperation, trust and so on inside one’s group but it often decreases cooperation with out-groups.
I may not be recalling correctly, but although there is some small studies on that, I do not think there is a lot of evidence that oxytocin always leads anxiety, etc. in people with insecure attachment style. I would suspect that it might be the case it initially increases insecurity because it makes those persons attend to their relationship issues. However, in the long-run it might lead them to solve those issues. I say this because there are many studies showing insecure attachment style is associated with lower oxytocin receptor density. If your hypothesis were correct the density should be (on average) the same. There are also a lot of studies showing a correlation between oxytocin levels and relationship satisfaction, duration and so on. Additionally, intranasal oxytocin increases conflict solution in couples. Again, these would not be the case if your hypothesis were true. Overall there is a lot more evidence that oxytocin does increase secure attachment, although there is a small amount of evidence that, in the short-term, it increases measures associated with insecure attachment.
Perhaps you have already read it, (and it might be a bit outdated by now) but Oxytocin and social affiliation in humans (Feldman, 2012) offers a pretty comprehensive review of oxytocin’s social effects. It will also point you to all the references to what I said above (it’s pretty easy to find).
EDIT: Note: I, and the English dictionary, believe hormetic is the property of having opposing effects at different dosages. Which does not seem to fit what you intended.