No abstract

This systematic literature review was undertaken primarily to examine the role that print and digitally mediums play in text comprehension. Overall, results suggest that medium plays an influential role under certain text or task conditions or for certain readers. Additional goals were to identify how researchers defined and measured comprehension, and the various trends that have emerged over the past 25 years, since Dillon’s review. Analysis showed that relatively few researchers defined either reading or digital reading, and that the majority of studies relied on researcher-developed measures. Three types of trends were identified in this body of work: incremental (significant increase; e.g., number of studies conducted, variety of digital devices used), stationary (relative stability; e.g., research setting, chose of participants), and iterative (wide fluctuation; e.g., text length, text manipulations). The review concludes by considering the significance of these findings for future empirical research on reading in print or digital mediums.

Plasmodium falciparum infection during pregnancy may cause placental malaria and subsequently low birth weight, primarily through the placental sequestration of infected red blood cells. Measuring the burden of malaria during pregnancy usually involves determining the prevalence of placental malaria infection through microscopic examination of placental blood films, a difficult and error-prone process. A number of rapid diagnostic tests (RDTs) for malaria have been developed, most of them immunochromatographic dipstick assays. However, none have been tested for the direct determination of malaria antigen in placental blood. We undertook an evaluation of the Malaria Rapid Test (MAKROmed in determining placental malaria infection. The prevalence of placental parasitemia was 22.6% by microscopy, 51.0% by a polymerase chain reaction (PCR), and 43.1% by RDT. When the PCR was used as the gold standard, RDTs had a sensitivity of 89% and a specificity of 76%. The MAKROmed RDT was highly sensitive in the detection of placental malaria, but had lower than expected specificity.

This study investigated the relational reasoning capabilities of older adolescents and young adults when the focal assessment was a verbal and more schooled measure than 1 that was figural and more novel in its configuration. To achieve this end, the verbal test of relational reasoning (vTORR) was constructed to parallel the test of relational reasoning (TORR), which has been shown to be a psychometrically sound measure of the ability to discern analogical, anomalous, antinomous, and antithetical patterns within figural problem sets. Two-hundred undergraduate students completed the vTORR, TORR, and a vocabulary cloze test. The psychometric properties of the vTORR were first examined to ensure that data were reliable and valid. Then, the convergence between the vTORR and TORR was tested, along with the degree to which performance on the vTORR could be explained by linguistic ability, as measured by the vocabulary cloze test. Outcomes of correlational and confirmatory factor analyses indicated that there was a significant moderate association between the ability to reason relationally in word (i.e., vTORR) and in figure (i.e., TORR) and that linguistic ability contributed only a limited amount to performance on the vTORR. Of 3 theoretical models tested, a 4-factor model was found to best fit the vTORR data, indicating that the 4 specific forms of relational reasoning reflected in this measure were directly related to overall performance.