Allan Collins

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Many teaching practices implicitly assume that conceptual knowledge can be abstracted from the situations in which it is learned and used. This article argues that this assumption inevitably limits the effectiveness of such practices. Drawing on recent research into cognition as it is manifest in everyday activity, the authors argue that knowledge is(More)
Chronic kidney disease (CKD) is increasingly recognized as a global public health problem. There is now convincing evidence that CKD can be detected using simple laboratory tests, and that treatment can prevent or delay complications of decreased kidney function, slow the progression of kidney disease, and reduce the risk of cardiovascular disease (CVD).(More)
ed in Proof 3 and that ANDS reproduced in the earlier example. However, the comparison between the subject's proof and ANDS's proof of the same theorem also points up a number of dissimilarities. The first of these is that some of the subject's statements never appear in ANDS's assertion or subgoal trees. This is true, for example, of the sentence in Line c(More)
Risk for ESRD among elderly patients with acute kidney injury (AKI) has not been studied in a large, representative sample. This study aimed to determine incidence rates and hazard ratios for developing ESRD in elderly individuals, with and without chronic kidney disease (CKD), who had AKI. In the 2000 5% random sample of Medicare beneficiaries, clinical(More)
Five experiments are described on the processing of ambiguous words in sentences. Two classes of ambiguous words (noun-noun and noun-verb) and two types of context (priming and nonpriming) were investigated using a variable stimulus onset asynchrony (SOA) priming paradigm. Noun-noun ambiguities have two semantically unrelated readings that are nouns (e.g.,(More)
Allan J. Collins, MD, Robert N. Foley, MB, Charles Herzog, MD, Blanche Chavers, MD, David Gilbertson, PhD, Areef Ishani, MD, MS, Bertram Kasiske, MD, Jiannong Liu, PhD, Lih-Wen Mau, PhD, Marshall McBean, MD, MSc, Anne Murray, MD, MSc, Wendy St. Peter, PharmD, Haifeng Guo, MS, Sally Gustafson, MS, Qi Li, MS, ShuLing Li, MS, Suying Li, PhD, Yi Peng, MS, Yang(More)
Fabry disease (alpha-galactosidase A deficiency) is an X-linked recessive lysosomal storage disorder. Although the disease presents in childhood and culminates in cardiac, cerebrovascular, and end-stage renal disease, diagnosis is often delayed or missed. This paper reviews the key signs and symptoms of Fabry disease and provides expert recommendations for(More)
Patients with ESRD consume a vastly disproportionate amount of financial and human resources. Approximately 0.03% of the US population began renal replacement therapy in 2004, an adjusted incidence rate of 339 per million. Declining incidence rates were observed for most primary causes of ESRD and in most major demographic categories; the worry is that(More)
The term “design experiments” was introduced in 1992, in articles by Ann Brown (1992) and Allan Collins (1992). Design experiments were developed as a way to carry out formative research to test and refine educational designs based on principles derived from prior research. More recently the term design research has been applied to this kind of work. In(More)