The influence of an integrated PBL format on geography students’ perceptions of their self-directedness in learning

Problem-based learning can be implemented in South African geography teacher education to foster geography students’ self-directed learning skills. The purpose of this longitudinal case study was to determine B.Ed. geography students’ (n = 45) perceptions of their self-directedness in learning in integrated problem-based learning experiences over a three-year period. The study used quantitative and qualitative research methods based on questionnaire application and semi-structured focus group interviews. The students completed a standardized questionnaire at regular intervals with the implementation of integrated problem-based learning experiences in geography modules over a three-year period. Focus group interviews with participants (n = 8) were employed to get a deeper understanding of the results of quantitative data. The results indicated that the geography students’ self-directed learning scores increased with the implementation of an integrated problem-based learning format in geography over the three-year period. The students who measured average, below average and low levels of self-directed learning at the beginning of the study had the highest increase in self-directed learning scores over the three years. The female students’ perceptions of their self-directedness in learning had higher increases in their self-directed learning scores after the problem-based learning interventions when compared to the male students.     

Elemental Analysis of Ochre Outcrops in Southern British Columbia,Canada

Ochre is a red mineral pigment that was a key element of social and ceremonial practices among cultures of the Pacific Northwest Coast. It is recovered routinely from archaeological excavations, is visible as pigment for pictographs, and is described in the historical record as a trade item and component of ceremonial practices. Despite its ubiquity in the archaeological record, it is difficult to interpret its significance without first understanding the nature of its procurement and distribution. As a step towards identifying procurement practices, trade and resource use, it is necessary to thoroughly characterize ochre outcrops with regard to their intra‐source and regional variability. We analysed ochre from three outcrops using INAA to determine their elemental chemistry. The purpose of this study is threefold: to provide an example of the range of elemental variability within and between outcrops, to illustrate the effect of scale and geomorphological processes on elemental compositions and statistical interpretation, and to create a database of known deposits in southern British Columbia. The results demonstrate that ochre deposits may be differentiated on the basis of their chemistry, and that conservative statistical interpretation needs to be employed to assess true elemental variability within and between ochre deposits and regions.     

The corporate group as an archaeological unit

Although corporate groups have featured in the anthropological literature for a century, and have more recently been proposed as a potentially useful unit for archaeological analysis (L. Freeman, 1968, In Man the hunter, edited by R. Lee and I. De Vore, pp. 262–267. Aldine, Chicago), application of the concept in archaeology has largely remained hypothetical, and little theoretical modeling has been attempted. In spite of this neglect, it is argued here that the corporate group is potentially one of the most useful and important aspects of the archaeological record that can be dealt with. This conclusion is derived from a detailed ethnoar-chaeological analysis of over 150 households in the Maya Highlands, in which it became apparent that social, economic, and demographic characteristics of households were only loosely associated with a wide variety of material culture expressions. In contrast, such inferences seemed to be much more reliable when households were grouped into “hypothetical corporate groups” and group averages were compared. In addition, theoretical considerations based on economics and on interactions also indicate that the analysis of corporate groups shold be more rewarding and potentially more accurate than the analysis of individual households. Archaeologically, corporate groups can be defined where residential coherency and internal hierarchies are demonstrable. Because corporate groups can be viewed as signaling major changes in the structuring of society, and in the evolution of social and political complexity, the investigation of conditions under which corporate groups emerge should be of major theoretical significance to the entire discipline of archaeology. Moreover, because of the close logical links to material culture and the environment, theoretical modeling should be particularly amenable to archaeological testing. In sum, corporate groups provide an unusually fertile problem area which archaeologists can hope to attack with at least a promising degree of success.     

Addressing seasonal site use through ancient DNA species identification of Pacific salmon at Dionisio Point,Galiano Island,British Columbia

We use ancient DNA analysis to identify Pacific salmon vertebrae to species in order to provide an important line of evidence that helps to establish the timing of seasonal residence at a Pacific Northwest Coast village site. Ancient DNA results from House 2 at Dionisio Point allow a characterization of the salmon fishery. Ten of eleven randomly selected smaller-sized salmon vertebrae were positively identified as sockeye salmon (Oncorhynchus nerka) while only a single pink salmon (Oncorhynchus gorbuscha) was identified. Of the 322 whole salmon vertebrae identified from House 2 occupation deposits during zooarchaeological analysis, 58 percent measure less than 8.0 mm and 70 percent are less than 8.5 mm in maximum transverse diameter. Together with documented aspects of the material record from Dionisio Point, most notably the vertebrate fauna from House 2, the indication that sockeye was the primary focus of the Dionisio Point salmon fishery suggests the site was inhabited during the spring and summer. This approach to the identification of season-specific site occupation has the potential for application over much of the Northeast Pacific.     

LA-ICP-MS analysis of quartzite from the Upper Gunnison Basin,Colorado

We report the results of LA-ICP-MS analysis of 402 quartzite samples representing 48 collection loci in the Upper Gunnison Basin (UGB), Colorado and determine the extent to which the sources can be geochemically discriminated from one another using this non-destructive technique. The ability to differentiate among the sources would open the door to provenance studies of the quartzite chipped-stone tools and debitage that constitute 95% or more of most of the 3000-plus prehistoric site assemblages documented in the UGB. Our samples represent prehistorically quarried and non-quarried quartzite sources, including outcrop (primary) and gravel (secondary) deposits. The results reveal spatial and chronological trends in quartzite elemental composition that can be exploited for provenance determinations of quartzite artifacts from UGB sites, albeit using an assemblage-based sourcing strategy that differs from the familiar approach of “matching” obsidian artifacts to their statistically likeliest geological source. We offer a preliminary version of a sourcing protocol for UGB quartzite.     

NISP, Bone Fragmentation, and the Measurement of Taxonomic Abundance

Zooarchaeologists have long recognized that the number of identified specimens (NISP) is dependent on the degree to which bones are fragmented, but attempts are rarely made to control for the effects of fragmentation on NISP. This paper provides insight into those effects by presenting both a formal model of the relationship between NISP and fragmentation and experimental data on that relationship. The experimental data have practical implications regarding the effectiveness of potential measures of bone fragmentation, suggesting that specimen size—which can be determined easily through digital image analysis—is more useful than other variables that have been or might be used as fragmentation measures.     

Interaction inferences in archaeology and learning frameworks of the maya

Stylistic variation has traditionally been assumed to reflect differential interaction. Although some researchers have questioned this premise, it seems valid as long as interaction is of a cooperative, nonhierarchical type. Other sources of stylistic variation may also exist. This paper examines cooperative learning of crafts within communities to determine what effect various learning contexts might have on the distribution of stylistic elements within communities. Six learning modes are identified: Family-Centered; Corporate; Kin-Extensive; Minimally Structured; Formal-Schooling; and Specialist. Each mode results in a distinctive distribution of stylistic elements. The Kin-Extensive mode is examined in detail using ethnoarchaeological data from the Maya Highlands. We conclude that by focusing on interaction rather than residence, archaeologists can deal with more meaningful problems for the evolution and functioning of past social systems, and these problems can be dealt with more successfully given the nature of archaeological data.