Mathematics, computers in mathematics, and gender: public perceptions in context

In Australia, national tests of mathematics achievement continue showing small but consistent gender differences in favor of boys. Societal views and pressures are among the factors invoked to explain such subtle but persistent differences. In this paper we focus directly on the beliefs of the general public about students’ learning of mathematics and the role played by computers, and then we compare the findings with data previously gathered from students. Although many considered it inappropriate to differentiate between boys and girls, gender based stereotyping was still evident

Formin isoforms are differentially expressed in the mouse embryo and are required for normal expression of fgf-4 and shh in the limb bud

Mice homozygous for the recessive limb deformity (ld) mutation display both limb and renal defects. The limb defects, oligodactyly and syndactyly, have been traced to improper differentiation of the apical ectodermal ridge (AER) and shortening of the anteroposterior limb axis. The renal defects, usually aplasia, are thought to result from failure of ureteric bud outgrowth. Since the ld locus gives rise to multiple RNA isoforms encoding several different proteins (termed formins), we wished to understand their role in the formation of these organs. Therefore, we first examined the embryonic expression patterns of the four major ld mRNA isoforms. Isoforms I, II and III (all containing a basic amino terminus) are expressed in dorsal root ganglia, cranial ganglia and the developing kidney including the ureteric bud. Isoform IV (containing an acidic amino terminus) is expressed in the notochord, the somites, the apical ectodermal ridge (AER) of the limb bud and the developing kidney including the ureteric bud. Using a lacZ reporter assay in transgenic mice, we show that this differential expression of isoform IV results from distinct regulatory sequences upstream of its first exon. These expression patterns suggest that all four isoforms may be involved in ureteric bud outgrowth, while isoform IV may be involved in AER differentiation. To define further the developmental consequences of the ld limb defect, we analyzed the expression of a number of genes thought to play a role in limb development. Most significantly, we find that although the AERs of ld limb buds express several AER markers, they do not express detectable levels of fibroblast growth factor 4 (fgf-4), which has been proposed to be the AER signal to the mesoderm. Thus we conclude that one or more formins are necessary to initiate and/or maintain fgf-4 production in the distal limb. Since ld limbs form distal structures such as digits, we further conclude that while fgf-4 is capable of supporting distal limb outgrowth in manipulated limbs, it is not essential for distal outgrowth in normal limb development. In addition, ld limbs show a severe decrease in the expression of several mesodermal markers, including sonic hedgehog (shh), a marker for the polarizing region and Hoxd-12, a marker for posterior mesoderm. We propose that incomplete differentiation of the AER in ld limb buds leads to reduction of polarizing activity and defects along the anteroposterior axis

Polydactylous limbs in Strong's Luxoid mice result from ectopic polarizing activity

Strong's Luxoid (1st^D) is a semidominant mouse mutation in which heterozygotes show preaxial hindlimb polydactyly, and homozygotes show fore- and hindlimb polydactyly. The digit patterns of these polydactylous limbs resemble those caused by polarizing grafts, since additional digits with posterior character are present at the anterior side of the limb. Such observations suggest that 1st^D limb buds might contain a genetically determined ectopic region of polarizing activity. Accordingly, we show that mutant embryos ectopically express the pattern-determining genes fibroblast growth factor 4 (fgf-4), sonic hedgehog (shh), and Hoxd-12 in the anterior region of the limb. Further, we show that anterior mesoderm from mutant limbs exhibits polarizing activity when grafted into host chicken limbs. In contrast to an experimentally derived polydactylous transgenic mouse, forelimbs of homozygotes show a normal pattern of Hoxb-8 expression, indicating that the duplication of polarizing tissue here occurs downstream or independently of Hoxb-8. We suggest that the 1st gene product is involved in anteroposterior axis formation during normal limb development

Curriculum and Assessment : A Question of Politics?

The Victorian Certificate of Education (VCE) has been subject to ongoing modifications since its full introduction in 1992. These changes were largely driven by vocal opponents of this educational reform. In this paper we give voice to teachers charged with implementing the curriculum and assessment directives of the VCE. Specifically, we draw on the experiences of close to 500 senior mathematics teachers – through interview and survey data - to consider the impact on them of the evolution of the VCE

Mathematics, computers in mathematics, and gender: public perceptions in context

In Australia, national tests of mathematics achievement continue showing small but consistent gender differences in favor of boys. Societal views and pressures are among the factors invoked to explain such subtle but persistent differences. In this paper we focus directly on the beliefs of the general public about students’ learning of mathematics and the role played by computers, and then we compare the findings with data previously gathered from students. Although many considered it inappropriate to differentiate between boys and girls, gender based stereotyping was still evident. Matemáticas, ordenadores en matemáticas y género: percepciones públicas en contexto En Australia, los test nacionales del logro matemático continúan mostrando pequeñas pero consistentes diferencias de género en favor de los chicos. Las presiones y visiones sociales están entre los factores invocados para explicar tales diferencias sutiles pero persistentes. En este trabajo nos centramos directamente en las creencias del público en general acerca del aprendizaje matemático de los estudiantes y del papel desempeñado por los ordenadores, y después comparamos las conclusiones con datos previamente obtenidos de los estudiantes. Aunque muchos consideran inapropiado diferenciar entre niños y niñas, todavía son evidentes estereotipos basados en el género.Handle: http://hdl.handle.net/10481/1601

The re-mediating effects of bio-sensing in the context of parental touch practices

This article investigates the remediating effect of bio-sensing technology on touch practices in the context of parent-infant interaction. We examine how the entry of a biosensing technology into the social, sensory and technological ecology of family homes interacts with the ways in which parents and babies know each other and communicate through touch. The paper centres on an exploratory case study of the Owlet Smart Sock (OSS), a bio-sensing baby monitoring device. We bring the social critical and experiential lenses of multimodality and sensory ethnography to studying the OSS as a socio-technological probe across a range of research encounters, including focus groups, home visits and video re-enactments with parents. In doing so, we provide an account of the ways in which the technology affects how babies and parents’ bodies are (re)imagined, assessed, controlled, interrelated, experienced, and cared for and move beyond generic social debate around the quantified-objectified baby and fears of touch deprivation in contemporary digital culture

Digitally-mediated parent–baby touch and the formation of subjectivities

This article examines how the use of emergent smart baby monitors re-mediates parent–baby touch, notions of connection, parental sensing and the interpretation of babies’ bodies, and contributes to the formation of subjectivities. Domestic baby monitors are a mid 20th-century phenomenon which normalizes parental anxieties. While baby monitoring is not new, the ‘next generation’ of wearable bio-sensing baby monitors offers a different relationship to the body via the physiological tracking of babies, and the sending of information or alerts to parents’ via connected mobile apps. These devices have been associated with creating unnecessary parental anxiety and the digital ‘replacement’ of parental touch, although little research exists on their use in the context of parent–infant interaction or touch. The authors present a qualitative case study of one such technology, Owlet, to explore how parents experienced, understood and negotiated the discourses of parent–infant touch that circulate around and through Owlet, with particular attention to the relationship between visual and tactile resources. The study focuses on both its multimodal design and take-up by parents through analysis of interviews with the Owlet designer, Owlet as a product, focus groups with parents and families’ home experiences of Owlet. Data is analysed through a tri-part lens, which first combines multimodal social semiotic and sensory ethnographic approaches, and then the analytical concept of governmentality. The findings are discussed in relation to four analytical themes: (1) creating a desire for digitally mediated touch; (2) spatiality of digitally mediated connection; (3) formulating the ‘right kind’ of touch; and (4) reconfiguring ‘knowing touch’. The authors discuss multimodal discourses pertinent to the shaping of parent–baby touch practices including: rationality and efficiency; individualism, autonomy and freedom; and self-improvement and empowerment. They conclude that the discourses that coalesce around Owlet contribute to the reconfiguration of parent–baby touch and the formation of neoliberal subjectivities

Mathematics, English and Gender Issues: Do Teachers Count?

Pedestrians were stopped in the street and asked about their views on the teaching and learning of mathematics and English for boys and girls. Many commented on the importance of teachers for both subject areas; some respondents self-identified as teachers. In this article we present findings on the gendering of mathematics and English and the impact that teachers can have on learning outcomes in these disciplines. The data reveal that mathematics is endorsed by many as a male domain and English as a female domain, and that teachers play an influential part in the learning outcomes – achievement, future participation, and attitudes – in both disciplines

Sleep Deprivation and Advice Taking

This is the final version. Available on open access from Nature Research via the DOI in this recordJudgements and decisions in many political, economic or medical contexts are often made while sleep deprived. Furthermore, in such contexts individuals are required to integrate information provided by – more or less qualified – advisors. We asked if sleep deprivation affects advice taking. We conducted a 2 (sleep deprivation: yes vs. no) ×2 (competency of advisor: medium vs. high) experimental study to examine the effects of sleep deprivation on advice taking in an estimation task. We compared participants with one night of total sleep deprivation to participants with a night of regular sleep. Competency of advisor was manipulated within subjects. We found that sleep deprived participants show increased advice taking. An interaction of condition and competency of advisor and further post-hoc analyses revealed that this effect was more pronounced for the medium competency advisor compared to the high competency advisor. Furthermore, sleep deprived participants benefited more from an advisor of high competency in terms of stronger improvement in judgmental accuracy than well-rested participants.Volkswagen Foundatio