A letter from Howard C. Berkowitz about “Impact of a Clinical Trials Information Handbook on Patient Knowledge, Perceptions, and Likelihood of Participation”.

Although sensorimotor contingencies may explain visual perception, it is difficult to extend this concept to speech perception. However, the basic concept of perception as active hypothesis testing using attention does extend well to speech perception. We propose that the concept of sensorimotor contingencies can be broadened to sensory-attentional contingencies, thereby accounting for speech perception as well as vision.

All students of the classical languages are aware that, in referring to intervals of time, the Greeks and Romans often employed a method of reckoning which was inclusive and consequently different from our own. The Greeks, for example, refer to the period between two celebrations of the Olympic games as a though we should call it a four-year interval. One instance of this kind of usage in Latin is the stereotyped formula employed in expressing a date: ante diem quintum Id. (...) Mai. is 11 May, though we should say that there was an interval of four days only between 11 and 15 May. Another instance is the use of tertiana and quartana as applied to fevers which recur on alternate days and on every third day respectively. The ramifications of this mode of expression are extensive, but I am only concerned here with one, namely the use of quisque with ordinals. (shrink)

I Consider first line 58, though its interpretation cannot be separated from that of the ensuing lines. The editors put a comma after iuuenem and must therefore intend propiorque iubenti to be taken with conticuit. It seems more natural, however, to take it with what precedes. The obvious function of propior in such a case is to qualify or amplify an idea already stated, as in Stat. Ach. 2. 94–95.

Farmers in developed countries have established various tillage practices for crop production. These include plowing, disking, subsoiling, harrowing, field cultivating, rotary hoeing, and row-crop cultivating. But these conventional tillage practices necessitate the use of heavy equipment that often causes soil compaction, impairs soil physical conditions, and creates conditions leading to soil erosion. Many Western countries, studying their conventional tillage systems through the new perspective of sustainable approaches to agriculture, are developing new tillage practices, called conservation tillage, which limit tillage to (...) essential operations and prevent damage to soil. The majority of the small-scale farmers in developing countries use indigenous tillage systems. These are low-cost, locally adapted technologies that reflect considerable knowledge of sustainable agriculture. Ironically, the new conservation tillage systems currently being developed in the West have many characteristics of indigenous tillage systems. This paper compares conventional, conservation, and indigenous tillage practices, using examples from the United States and India, and concludes that, for sustainable food production, indigenous tillage practices in developing countries should continue to be used. (shrink)