Assessment of learning gains associated with independent exam analysis in introductory biology

This study evaluates the impact of an independent postmidterm question analysis exercise on the ability of students to answer subsequent exam questions on the same topics. It was conducted in three sections (～400 students/section) of introductory biology. Graded midterms were returned electronically, and each student was assigned a subset of questions answered incorrectly by more than 40% of the class to analyze as homework. The majority of questions were at Bloom's application/analysis level; this exercise therefore emphasized learning at these higher levels of cognition. Students in each section answered final exam questions matched by topic to all homework questions, providing a within-class control group for each question. The percentage of students who correctly answered the matched final exam question was significantly higher (p < 0.05) in the Topic Analysis versus Control Analysis group for seven of 19 questions. We identified two factors that influenced activity effectiveness: 1) similarity in topic emphasis of the midterm-final exam question pair and 2) quality of the completed analysis homework. Our data suggest that this easy-to-implement exercise will be useful in large-enrollment classes to help students develop self-regulated learning skills. Additional strategies to help introductory students gain a broader understanding of topic areas are discussed.     

Recurrent Otitis Media and Attachment Security: A Path Model

The present study examined the processes through which recurrent episodes of otitis media influence children's attachment security. The model guiding the research suggests that mothers of children who experience recurrent episodes of otitis media have higher levels of parenting stress, which can have a direct negative effect on attachment security. As well, an increase in parenting stress may be indirectly related to attachment security by decreasing maternal sensitivity, a known precursor of attachment security. A structured telephone illness interview was conducted with mothers of 161 children every 2 weeks for 6 months to determine the number of episodes of otitis media children experienced. At the end of this period, parenting stress, attachment security, and maternal sensitivity were assessed. Recurrent episodes of otitis media did negatively affect attachment security by increasing mothers' perceptions of their children as behaving more negatively. Parenting stress was not related to maternal sensitivity; however, maternal sensitivity did predict attachment security.     

Context specificity of sensory preconditioning: Implications for processes of within-event learning

A variant of the taste aversion procedure for sensory preconditioning, as used by Rescorla and Cunningham (1978), was employed in a study of the context dependency of within-event learning. In two experiments, rats received Phase 1 exposure to a simultaneous flavor compound, AX; flavor X was paired with illness during Phase 2, and any tendency for the resulting aversion to be elicited by A was measured. It was found that subjects were less likely to shun flavor A as a consequence of this training if the Phase 1 and test episodes were conducted in distinctively different contexts. This effect was evident both when the change of context occurred just before the test with flavor A (Experiment 1) and when it occurred before Phase 2 (Experiment 2). These results were taken to imply that, as is often found with serial associations, the retrieval of within-event associations is subject to contextual control. The implications of these findings for the interpretation of perceptual learning effects are discussed.     

How do we do this: learning how to teach socioscientific issues

Cultural Studies of Science Education - Socioscientific Issues (SSI) provide a strong framework for engaging students and teachers in meaningful and relevant scientific discourse in the development...     

Spatial pattern learning in rats: Conditional control by two patterns

Rats searched for food hidden on top of poles in a 4 × 4 matrix of poles. Before each trial, the location of the four baited poles was unpredictable. However, the poles were always baited in one of two spatial patterns, either a square or a line. The food hidden on the four baited poles was one of two types, and the food type determined the identity of the pattern. Thus, once one baited pole was discovered, the food type provided a cue for the spatial pattern in which the remaining food was hidden. The results showed that rats learned the two spatial patterns in which the food was hidden and used the conditional cue to determine which pattern was relevant on individual trials, thereby increasing the efficiency of spatial search.     

Imagining accidental fetal citizens: pregnant Mainland women and the cultural politics of birthright citizenship

This essay looks at the mobility of pregnant Mainland women in Hong Kong to expose the reverberations of the SAR government's immigration policies relating to cross-border birth tourism. Pregnant Mainland women and their children (fetuses), as emergent social subjects, embody conflict and the negotiation between population governance and economic benefits. The government denies pregnant Mainland women the right to give birth in Hong Kong based on their non-eligible status while admitting their children to be born in Hong Kong on the grounds that their children meet Hong Kong's future demand for population renewal, in this way boosting the development of childbirth tourism. However, the localism, which has had an extensive influence on Hong Kong local society in recent years, has rejected the SAR government's “population renewal” imaginary by suggesting its own “locust imaginary.” The government's acceptance and the local's exclusion of the population flow between China and Hong Kong imply distinct cross-border subject imaginations. Only by contextualizing and critically analyzing the various othering identities such as the non-eligible or locusts can we better understand the cultural politics of Hong Kong birthright citizenship over recent years.     

Social support and physical activity participation among healthy adults: a systematic review of prospective studies

The objective of this review was to determine the direction and strength of the prospective relationship between social support and PA among healthy adults. A systematic review was conducted; including studies up until December 2015, in the following databases: Ovid MEDLINE, EMBASE, PsychINFO, SPORTDiscus, and Scopus. Published English and French written studies were included if the reported study used a longitudinal design; examined the relationship between social support and PA over at least two intervals; and assessed a sample of healthy adults between 18–65 years of age. Two reviewers independently extracted study information and independently assessed the risk of bias in each study. The initial search yielded a total of 2892 citations, and 20 studies were included in the review. Follow-up period ranged from 2 weeks to 10 years. Irrespective of the type and source of support, the strength and direction of the association between social support and PA was inconsistent across studies, with effect sizes ranging from small to large and from negative to positive. Based on meta-analysis, there was a small positive association between support for PA from friends and future PA. Researchers are encouraged to continue to conduct longitudinal studies to better understand the relationship between social support and PA.