The model proposes bringing back a form of the old divisional structure, which split the country into geographical units, to create a secondary competition.

One empirically-derived model proposes two dimensions (thinking and feeling) and three clusters: bond, information, and role.

To explain this selective attention, the distractor inhibition model proposes a dual mechanism involving excitation to boost target signal and inhibition to suppress distractors.

Finally, the most recent model proposes a double link among the caseins for gelling to take place.

This model proposes that star formation propagates via the action of shock waves produced by stellar winds and supernovae that compose the interstellar medium.