A personality profile of Mount Everest climbers

The Eysenck Personality Questionnaire-Revised was administered to a group of climbers (N=39) who were attempting to summit Mount Everest. The personality profiles for these climbers were characterized by higher scores on the Extraversion (sociability) and Psychoticism (toughmindedness) scales and lower scores on the Neuroticism (anxiety) scales than for the normative sample. This profile is consistent with the pattern typically observed for athletes and notably for higher achieving athletes.     

Black Mountain College: A Creative Art Space Where It Was Safe to Fail

Black Mountain College is remembered as an artistic utopian alternative to institutional learning. Its faculty and students included some of the most important creative thinkers of the 20th century. Its foundation was built on the philosophy of “learning by doing.” But what made Black Mountain such a dynamic educational environment? Today, the financial burden of higher education places a lasting strain on students that inhibits creative growth. Does the educational structure of the college system impede our learning? Black Mountain was a legendary educational experiment, which offers a model for contemporary art education.     

关于湖北磨盘山神权社会的考察

关于明清之际欧洲传教士在华活动的研究,学人一般把目光投向学术层面,研究的对象多是在中西文化交流中做出过重要贡献的传教士。事实上,传教士作为一个群体来到中国,其最终目的是传播基督福音,他们不仅在中国的京城及重要城市建立了传教会,还把影响扩展到偏远的乡村,因而当中国政府用武力实行禁教的时候,乡村教会成为传教士和基督徒的避难所。明清全国乡村天主教的发展以鄂北的磨盘山最为典型,本文将此作为特殊的个案进行讨论,希望从中找出中国乡村天主教发展的若干特点。通过调查研究,作者发现,乡村天主教在清朝禁教期间并没有绝迹,而是一直延续到近代社会。因而,基督教来华历史的四个时期的划分对于天主教来说似乎不太客观。     

Flexible cue use in food-caching birds

An animal’s memory may be limited in capacity, which may result in competition among available memory cues. If such competition exists, natural selection may favor prioritization of different memory cues based on cue reliability and on associated differences in the environment and life history. Food-caching birds store numerous food items and appear to rely on memory to retrieve caches. Previous studies suggested that caching species should always prioritize spatial cues over non-spatial cues when both are available, because non-spatial cues may be unreliable in a changing environment; however, it remains unclear whether non-spatial cues should always be ignored when spatial cues are available. We tested whether mountain chickadees (Poecile gambeli), a food-caching species, prioritize memory for spatial cues over color cues when relocating previously found food in an associative learning task. In training trials, birds were exposed to food in a feeder where both spatial location and color were associated. During subsequent unrewarded test trials, color was dissociated from spatial location. Chickadees showed a significant pattern of inspecting feeders associated with correct color first, prior to visiting correct spatial locations. Our findings argue against the hypothesis that the memory of spatial cues should always take priority over any non-spatial cues, including color cues, in food-caching species, because in our experiment mountain chickadees chose color over spatial cues. Our results thus suggest that caching species may be more flexible in cue use than previously thought, possibly dependent upon the environment and complexity of available cues.     

Comparing black-capped (Poecile atricapillus) and mountain chickadees (Poecile gambeli): use of geometric and featural information in a spatial orientation task

Since Cheng (Cognition 23:149–178, 1986) first proposed the “geometric module” in rats, a great deal of research has focused on how other species use geometric information and how geometric encoding may differ across species. Here, hand-reared and wild-caught black-capped chickadees and wild-caught mountain chickadees searched for food hidden in one corner in a rectangular environment. Previous research has shown that mountain chickadees do not spontaneously encode geometric information when a salient feature is present near the goal location. Using a slightly different training and testing procedure, we found that both hand-reared and wild-caught black-capped chickadees encoded geometric information, even in the presence of a salient landmark. Some, but not all, mountain chickadees also encoded geometric information. Overall, our results suggest that use of geometric information may be a less preferred strategy for mountain chickadees than for either wild-caught or hand-reared black-capped chickadees. To our knowledge, this is the first direct interspecies comparison of use of geometric information in a spatial orientation task.     

Manual dexterity in the gorilla: bimanual and digit role differentiation in a natural task

The manipulative actions of mountain gorillas Gorilla g. beringei were examined in the context of foraging on hard-to-process plant foods in the field, in particular those used in tackling thistle Carduus nyassanus. A repertoire of 72 functionally distinct manipulative actions was recorded. Many of these actions were used in several variants of grip, finger(s) and movement path, both by different individuals and by the same individual at different times. The repertoire appears somewhat greater than that observed in comparable studies of monkeys, but a far more striking difference is found in the use of differentiated actions in concert. Mountain gorillas routinely and frequently deal with problems that involve: (1) bimanual role differentiation, with the two hands taking different roles but synchronized in time and space, and (2) digit role differentiation, with independent control of parts of the same hand used for separate purposes at the same time. The independent control that allows these abilities, so crucial to human manual constructional ability, is apparently general in African great apes. Role differentiation, between and within the hand, is evidently a primitive characteristic in the human arsenal of skills. Accepted after revision: 6 April 2001 Electronic Publication     

Performance differences between stuttering and nonstuttering subjects on a sound fusion task

This study investigated the possibility that there are central auditory level processing differences between stutterers and nonstutterers. The experimental subjects were eight male and three female stutterers ranging in age from 20–45 yr, with a mean age of 31.2 yr. The control group consisted of the same number of males and females, ranging in age from 20–45 yr, with a mean age of 30.1 yr. Each subject participated in a sound fusion task under three variable conditions: 1) group performance (nonstutterers vs. stutterers); 2) ears (right vs. left); and 3) lead-time presentation (0–100 msec). Statistically significant differences were found for lead-time presentation.     

Political agency and violence: understanding the causes of the Mountain Meadows Massacre

ABSTRACT

In contrast to political power – a generalised capacity for modifying the behaviour of other actors – the article conceptualises political agency as the actions of political actors which actually cause other actors to behave in a certain way. Analysing agency consists of identifying agents, actual veto players whose (in)actions lead to the outcomes in question, and explaining the causal relation between their (in)actions and the behaviour of other actors. Thus conceptualised, agency becomes an empirically grounded, value-free synonym for the more emotionally charged notions of political or moral responsibility. This model of political agency is then applied to an empirical analysis of the Mountain Meadows Massacre, a mass murder of emigrants in Utah committed by Mormons and Native Americans in 1857. Three categories of factors are invoked – cultural, institutional and behavioural – to recreate the chain of necessary, sufficient, SUIN and INUS causes which led up to the event.     

Absolute pitch in boreal chickadees and humans: Exceptions that test a phylogenetic rule

This research examined generality of the phylogenetic rule that birds discriminate frequency ranges more accurately than mammals. Human absolute pitch chroma possessors accurately tracked transitions between frequency ranges. Independent tests showed that they used note naming (pitch chroma) to remap the tones into ranges; neither possessors nor nonpossessors were accurate at octave (pitch height) naming. Boreal chickadees discriminated frequency ranges less accurately than other birds; they tracked reward across several lower frequency ranges but failed at frequencies over 4000 Hz. The results revealed the error of describing species differences solely in terms of their discrimination of frequency ranges. Exceptions to the rule disappear when the rule is restated in terms of underlying mechanism: birds are superior to mammals in the ability to use absolute pitch height perception to discriminate pitches and ranges of pitches.