Second, the relationship between perceived personal experience and personal norm was mediated by agreement with the new ecological paradigm, awareness of consequences, and ascription of responsibility. Effectively, this was a parallel version of value-belief-norm theory, which replaced environmental values with perceived experience. So why did the current model not also include environmental values? There are a couple reasons. First, Stern, Kalof, Dietz, and Guagnano (1995) argued values are general principles that underlie behavioral decisions and are resistant to the influence of information.