Alastair has used classical conditioning to train his dog to salivate every time Ingo whistles a C#. After the dog has mastered this association, Alastair then pairs a flashing light with the sound of a whistled C#, and finds that over time, his dog now salivates to the flashing light. Which principle of classical conditioning is at work here?

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.