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Four varieties of mammals whose medial superior olives range from large to none at all were tested for their ability to localize single, brief tone pips at various frequencies. Although each animal could localize high-frequency tone pips, their ability to localize middle- and low-frequency tone pips corresponded to the size of their medial superior olive… (More)
To investigate how rod signals influence hue perception and how this influence can be incorporated into opponent-color models, we measured the shift of unique-hue loci under dark-adapted conditions compared with cone-plateau conditions. Rod signals produced shifts of all spectral unique hues (blue, green, yellow) but in a pattern that was inconsistent with… (More)
Meeting Aim: " It is the purpose of the Task Force on Undergraduate Retention and Graduation to complete an analysis of undergraduate retention and graduation and to recommend tactics for implementation that will yield improvements on both areas. " John Bechtold's comments (note 5 and 6 in Part 3 added); figures removed. To design the first-year placement… (More)
Publications: Over 200 papers in refereed journals; over 70 reviews, articles. ADS cites 12963, h-index 64 Citation rate in highest percentile of astronomers and space scientists worldwide.