The two types of explanations attempt to account for this difference are instrumental theories and temperamental theories.
2.
The instrumental theory suggests that extraverts end up making choices that place them in more positive situations and they also react more strongly than introverts to positive situations.
3.
He granted that science might apply empirical or instrumental theories, but asserted that epistemological or reality-based theories, revealing truths independently of experience, are equally valid.
4.
In their study of extraversion, Lucas and Baird found no statistically significant support for the instrumental theory but did, however, find that extraverts generally experience a higher level of positive affect.
5.
The " Veblenian dichotomy " was a specialized variant of the " instrumental theory of value " due to John Dewey, with whom Veblen was to make contact briefly at the University of Chicago.
6.
This important contribution to the evolution of the guitar is expounded in his didactic series ( the " Cuadernos " ), " Escuela de la Guitarra Exposici�n de la Teor�a Instrumental " ( School of Guitar Exposition of Instrumental Theory ) as well as in the " Carlevaro Masterclass " series.