Explaining the substantial inter-domain and over-time correlations in student achievement: the importance of stable student attributes

Multi-domain and longitudinal studies of student achievement routinely find moderate to strong correlations across achievement domains and even stronger within-domain correlations over time. The purpose of this study is to examine the sources of these patterns analysing student achievement in 5 domains across Years 3, 5 and 7. The analysis is of longitudinal population data of over 22,000 students and utilizes fixed-effects models to incorporate stable general and domain-specific latent factors. These latent factors correspond to a general cognitive-ability-like factor and specific aptitudes in particular, or types of, subject areas. The preferred model incorporates both general and domain-specific latent factors with stronger effects for the general factor, although the domain-specific factors are particularly strong for spelling and numeracy. When taking into account general and domain-specific latent factors, the effects of student’s socioeconomic status (SES) and school SES are trivial.     

With the eyes of others: an ethnography of an academic office

The author raises questions about ethnographic methodology through exploring the implications of using observations produced by his colleagues about his office as data for his research. This process blurred the boundaries between researcher, method and the object and subject of research. It meets some criteria for ethnography and not others, and does not evidence clear definitional boundaries for any sub-genre such as autoethnography or collaborative authoethnography. Besides raising definitional challenges and the blurring of roles in research, the study also illustrates how the methodology revealed tensions over collegial trust, boundaries and privacy. The author's colleagues exposed aspects of the author's identity that were opaque and even invisible to the author. The author accordingly raises questions about the locus of ethical concern. Thus, issues of roles, definition, trust, boundaries, privacy and method were entwined.     

Effects of maze geometry and experience on exploratory behavior in the rat

Rats were exposed twice in a rotated sequence to a series of six mazes, consisting of hexagonal alleys, balanced for different alley length and structural complexity. Locomotor activity increased with alley length and decreased with structural complexity of the mazes. Locomotion became less stereotyped with increased experience, showing an increasing number of turns, less constant velocity, loss of the initial preference for outward leading alleys and weakening of the forward tendency at reentry from side alleys into hexagonal alleys. In contrast to these qualitative changes of locomotion, the amount of activity remained almost unchanged throughout the experiment. The results suggest that these increases in locomotion complexity depend upon complex interactions between experience and stimulus content of the mazes.