Brightnesses,luminances, and Fechner’s paradox

Monocular brightnesses were varied, without varying monocular luminances, both by means of simultaneous contrast and by means of changes in the level of adaptation. Binocular brightness was shown to change in accord with monocular brightness, independent of monocular luminances.     

Effects of noise on sensitivity of introverts and extraverts to signals in a vigilance task

Forty Ss, previously classified as introverts or extraverts on the basis of scores on the Eysenck Personality Inventory, performed a visual vigilance task while being stimulated with noise at an intensity level of either 65 or 85 dB. Introverts given noise of 65 dB intensity showed an improvement in detection rate across trials, whereas introverts given noise of 85 dB intensity showed a decline in detection rate. Extraverts responded to noise of 65 dB intensity with a slight decrease in detection rate, but showed an improvement in detection over trials when noise of 85 dB intensity was given. When noise of the lower intensity was given, introverts showed greater sensitivity to signals than extraverts. When noise of the higher intensity was given, introverts and extraverts were equal in sensitivity. The results are discussed in terms of a hypothesized relationship between stimulation and arousal, with E-I as a moderator variable.     

The Integrative Role of Sacrifice in the Theology of Henri de Lubac

At key junctures in his theologies of spiritual exegesis, the Eucharist and the church, Henri de Lubac appeals to the notion of Christ's sacrifice as providing the pivotal content for the topic at hand. Despite this, de Lubac scholarship has devoted scant attention to the role of sacrifice in his thought. Using the fourfold sense of Scripture and the scholastic categories of res and sacramentum to establish a formal structure for de Lubac's thought, I demonstrate that sacrifice provides an integrative motif for these disparate areas of de Lubac's thought, better accounting for the ‘organic unity’ of his theology.