SBT scale
The range of attraction (like) or repulsion (dislike) effects mediated by "force exchanges" in human life, e.g. a smile or a frown, exists as a gradient on a range of extreme repulsion to extreme attraction:
Situational Bond Type Scale
The numbers shown, represent a gradient on a nine-point situational bond type (SBT) scale, numbers which can be used to quantify the "set" of over-lapping attraction and repulsion forces existing in any given human bond. [1]
References
1. Thims, Libb. (2007). Human Chemistry (Volume One), (preview), (ch. 16 "Attraction and Repulsion", pgs. 147-182). Morrisville, NC: LuLu.
2. Thims, Libb. (2007). Human Chemistry (Volume Two), (preview), (ch 13: "Human Chemical Bonding" [Gottman stability ratios], pgs. 515-560). Morrisville, NC: LuLu.