The cognitive consistency theory is an alternative to Hull’s, yet it still has a foundation in homeostatic equilibrium.  In this theory, motivation for behavior occurs when different internal thoughts conflict and create tension.  The tension creates the motivation for behaviors to ease the tension and thus bringing the subject back to a homeostatic state.
     A popular version of this theory has been the cognitive dissonance theory.  It basically is very similar to what was stated above.  Discrepancies in the environment created the motivation to alleviate the stress.  It allows the subject to choose between two options, forcing the subject to weigh the positives and negatives of each choice, and in the end choosing the option that relieves the most stress.  Examples can be found all throughout our world, such as weighing the options and choosing the best Internet provider or cell phone service.