“Simply No Worse and Simply No Better” May Simply Be Wrong: A Critique of Veenman’s Conclusion About Multigrade Classes

1996 ◽  
Vol 66 (3) ◽  
pp. 307-322 ◽  
Author(s):  
DeWayne A. Mason ◽  
Robert B. Burns
Keyword(s):  
Student Achievement ◽  
Selection Bias ◽  
Teacher Motivation ◽  
Key Factors ◽  
Negative Effects ◽  
Age Classes ◽  
Classroom Structure ◽  
Quality Instruction ◽  
Negative Effect ◽  
Classroom Structures

Although Simon Veenman’s (1995) synthesis of research on multigrade and multi-age classes contributes important definitions and findings to the literature, his assessment of the effects of multigrade classes—the more common of these classroom structures—ignores two key factors: (a) selection bias and (b) lower-quality instruction. The omission of these two key factors and Veenman’s implicit advocacy of multi-age classes and cross-grade grouping render his no-difference conclusion problematic. In this article, we critique Veenman’s conclusion and explanations, and argue that selection bias and lower-quality instruction should be included as part of the explanation for his no-difference finding. We conclude that multigrade classes have at least a small negative effect on achievement as well as potentially negative effects on teacher motivation. We suggest that researchers examine more carefully the conditions under which student achievement and affect may be fostered in this classroom structure.

scholarly journals Effects of COVID-19-Related School Closures on Student Achievement-A Systematic Review

2021 ◽  
Vol 12 ◽  
Author(s):  
Svenja Hammerstein ◽  
Christoph König ◽  
Thomas Dreisörner ◽  
Andreas Frey
Keyword(s):  
Student Achievement ◽  
Low Socioeconomic Status ◽  
Evidence Based ◽  
Negative Effects ◽  
School Closures ◽  
Low Socioeconomic ◽  
Primary And Secondary Education ◽  
Negative Effect ◽  
The Impact ◽  
Future School

The COVID-19 pandemic led to numerous governments deciding to close schools for several weeks in spring 2020. Empirical evidence on the impact of COVID-19-related school closures on academic achievement is only just emerging. The present work aimed to provide a first systematic overview of evidence-based studies on general and differential effects of COVID-19-related school closures in spring 2020 on student achievement in primary and secondary education. Results indicate a negative effect of school closures on student achievement, specifically in younger students and students from families with low socioeconomic status. Moreover, certain measures can be identified that might mitigate these negative effects. The findings are discussed in the context of their possible consequences for national educational policies when facing future school closures.

scholarly journals Effects of COVID-19-Related School Closures on Student Achievement—A Systematic Review

2021 ◽  
Author(s):  
Svenja Hammerstein ◽  
Christoph König ◽  
Thomas Dreisoerner ◽  
Andreas Frey
Keyword(s):  
Student Achievement ◽  
Low Socioeconomic Status ◽  
Evidence Based ◽  
Negative Effects ◽  
School Closures ◽  
Low Socioeconomic ◽  
Negative Effect ◽  
K 12 ◽  
The Impact ◽  
Future School

The COVID-19 pandemic led to numerous governments deciding to close schools for several weeks in spring 2020. Empirical evidence on the impact of COVID-19-related school closures on academic achievement is only just emerging in the literature. The present work aimed to provide a first systematic overview of evidence-based studies on general and differential effects of COVID-19-related school closures in spring 2020 on student achievement in K–12. The findings indicate a considerably negative effect of school closures on student achievement specifically in younger students and students from families with low socioeconomic status. At the same time, certain measures can be identified that might mitigate these negative effects. The findings are discussed in the context of their possible consequences for future national educational policies when facing future school closures.

scholarly journals Burrowing crabs and physical factors hasten marsh recovery at panne edges

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0249330
Author(s):  
Kathryn Beheshti ◽  
Charlie Endris ◽  
Peter Goodwin ◽  
Annabelle Pavlak ◽  
Kerstin Wasson
Keyword(s):  
Salt Marsh ◽  
Global Climate ◽  
Field Investigation ◽  
Physical Factors ◽  
Key Factors ◽  
Negative Effects ◽  
Central California ◽  
Marsh Loss ◽  
Negative Effect ◽  
Positive Effect

Salt marsh loss is projected to increase as sea-level rise accelerates with global climate change. Salt marsh loss occurs along both lateral creek and channel edges and in the marsh interior, when pannes expand and coalesce. Often, edge loss is attributed to erosive processes whereas dieback in the marsh interior is linked to excessive inundation or deposition of wrack, but remains poorly understood. We conducted a two-year field investigation in a central California estuary to identify key factors associated with panne contraction or expansion. Our study explored how an abundant burrowing crab, shown to have strong negative effects on marsh biomass near creek edges, affects panne dynamics. We also explored which physical panne attributes best predicted their dynamics. To our knowledge, ours is the first study of panne dynamics in a California marsh, despite how ubiquitous pannes are as a feature of marshes in the region and how often extensive marsh dieback occurs via panne expansion. Overall, we found that pannes contracted during the study period, but with variable rates of marsh recovery across pannes. Our model incorporating both physical and biological factors explained 86% of the variation in panne contraction. The model revealed a positive effect of crab activity, sediment accretion, and a composite of depth and elevation on panne contraction, and a negative effect of panne size and distance to nearest panne. The positive crab effects detected in pannes contrast with negative effects we detected near creek edges in a previous study, highlighting the context-dependence of top-down and bioturbation effects in marshes. As global change continues and the magnitude and frequency of disturbances increases, understanding the dynamics of marsh loss in the marsh interior as well as creek banks will be critical for the management of these coastal habitats.

scholarly journals Family Structure as an Effect on Student Achievement

2015 ◽  
Author(s):  
◽  
Benjamin Bernhardt Johnson
Keyword(s):  
Student Achievement ◽  
Significant Relationship ◽  
Null Hypothesis ◽  
Single Parent ◽  
Negative Effects ◽  
Communication Arts ◽  
Significance Level ◽  
Benchmark Assessments ◽  
Negative Effect ◽  
The Impact

Students not only learn at different speeds and methods but also live in many different households and face many challenges to their personal academic journeys. These households have both positive and negative effects on the students which is often mirrored in the classroom. How students learn, and what are the factors that have positive and a negative effect on their learning is not only a very important aspect of education, but a highly evolving phenomena. Family households have changed rapidly over the last several decades and it is the job of the educational community to adhere to these changes in order to service each student in the very best way possible. The purpose of this study was to classify a selected group of students into three family households: married, single/divorced and foster guardianship and using state standardized tests in math and communication arts (MAP) along with school district quarterly benchmark assessments, see if a significant relationship exists between family households and student achievement. Once a significant relationship is identified, the study addressed to what degree the significance level existed, and finally through an analysis of the literature review, make recommendations that might benefit school districts in helping students that are not performing at the appropriate levels of success in state testing. iv The study will address four research questions: 1) How do 5th and 6th grade students from two parent homes compare academically with 5th and 6th grade students from single parent or guardianship homes, as measured by the Math MAP? 2) How do 5th and 6th grade students from two parent homes compare academically with 5th and 6th grade students from single parent or guardianship homes, as measured by the Communication Arts MAP? 3) How do 5th and 6th grade students from two parent homes compare academically with 5th and 6th grade students from single parent or guardianship homes as measured by Math quarterly benchmark assessments? 4) How do 5th and 6th grade students from two parent homes compare academically with 5th and 6th grade students from single parent or guardianship homes as measured by Communication Arts quarterly benchmark assessments? The testing instrument used was ANOVA (Analysis of Variance), which provided the appropriate measure of testing for the dependent variable (MAP and Quarterly Benchmarks) and the independent variable (family demographics, households). The results of the data will be organized and identified as having significant relationships and rejections of the null hypothesis or an acceptance of the null hypothesis. The study was significant because it examined literature that addressed the impact that a home life has on a student, and how that affect that students' performance in the classroom. v the study also will provide recommendations for educators that would be beneficial in addressing the growing needs of all students based on the type of household they dwell.

scholarly journals Effects of Multigrade and Multi-Age Classes Reconsidered

1996 ◽  
Vol 66 (3) ◽  
pp. 323-340 ◽  
Author(s):  
Simon Veenman
Keyword(s):  
Evidence Synthesis ◽  
Effect Sizes ◽  
Future Research ◽  
Negative Effects ◽  
Age Classes ◽  
Best Evidence Synthesis ◽  
Negative Effect ◽  
Weighted Effect ◽  
Favorable Conditions ◽  
Age Studies

In response to “Cognitive and Noncognitive Effects of Multigrade and Multi-Age Classes: A Best-Evidence Synthesis” ( Veenman, 1995 ), Mason and Burns (1996) report that their research and review of the literature has led them to conclude that multigrade classes have a slightly negative effect on student achievement. They argue, moreover, that multigrade classes generally have better students and perhaps better teachers and that this selection bias masks the negative effects of less effective instruction in multigrade classes. In this rejoinder, a reanalysis, based on meta-analytic procedures, of the available multigrade and multi-age studies shows the average weighted effect sizes to be essentially zero or close to zero. For all analyses, the confidence intervals around the average effect sizes included zero. These results provide little support for the assumption that the quality of instruction in multigrade classes is lower than in single-grade classes. Between-study differences revealed that favorable conditions for classroom instruction, the country of publication, the locality and socioeconomic status of the school, the grade level of the students, and the number of years spent in multigrade classes need the attention of investigators in future research into the effects of multigrade classes.

scholarly journals Asthma patients experience increased symptoms of anxiety, depression and fear during the COVID-19 pandemic

2021 ◽  
Vol 18 ◽  
pp. 147997312110296
Author(s):  
Geertje M de Boer ◽  
Laura Houweling ◽  
Rudi W Hendriks ◽  
Jan H Vercoulen ◽  
Gerdien A Tramper-Stranders ◽  
...  
Keyword(s):  
Online Survey ◽  
Anxiety And Depression ◽  
Negative Effects ◽  
Cross Sectional ◽  
Healthcare Facilities ◽  
Care Workers ◽  
Asthma Patients ◽  
Negative Effect ◽  
Patients Experience ◽  
Anxiety Depression

Population studies showed a decrease in psychological wellbeing during the COVID-19 pandemic. Asthma is associated with a negative effect on anxiety and depression, which might worsen during the COVID-19 lockdown. The aim of the study was to compare fear, anxiety and depression between asthma patients and patients wit hout asthma pre-COVID-19 and during COVID-19 pandemic. This study compares fear, anxiety and depression in asthma patients and controls between pre-COVID-19 and during COVID-19 lockdown with a cross-sectional online survey. Participants were invited to fill out several questionnaires pertaining to fear, anxiety, depression, asthma control and quality of life. Asthma patients (N = 37) displayed, during the course of the pandemic, a clinically relevant increase in anxiety (3.32 ± 2.95 vs. 6.68 ± 3.78; p < 0.001) and depression (1.30 ± 1.15 vs. 3.65 ± 3.31; p < 0.001), according to the hospital anxiety and depression levels (HADS) compared to pre-COVID-19 assessment. This was not seen in controls. Also, asthma patients displayed more anxiety about acquiring COVID-19 disease compared to controls ((5.11 ± 1.99 vs. 3.50 ± 2.79), p = 0.006). Patients with asthma experienced an increase in anxiety and depression levels and were more afraid of acquiring COVID-19 disease compared to controls. Also, patients with asthma were more likely to avoid healthcare facilities due to fear of acquiring COVID-19 disease compared to controls. Therefore, we advise health care workers to address these possible negative effects on mental health by phone or e-consults.

scholarly journals Drought and Salinity in Citriculture: Optimal Practices to Alleviate Salinity and Water Stress

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1283
Author(s):  
Vasileios Ziogas ◽  
Georgia Tanou ◽  
Giasemi Morianou ◽  
Nektarios Kourgialas
Keyword(s):  
Agricultural Sector ◽  
Review Paper ◽  
Cell Metabolism ◽  
High Water ◽  
Crop Productivity ◽  
Fruit Tree ◽  
Key Factors ◽  
Negative Effect

Among the various abiotic stresses, drought is the major factor limiting crop productivity worldwide. Citrus has been recognized as a fruit tree crop group of great importance to the global agricultural sector since there are 140 citrus-producing countries worldwide. The majority of citrus-producing areas are subjected to dry and hot summer weather, limited availability of water resources with parallel low-quality irrigation water due to increased salinity regimes. Citrus trees are generally classified as “salt-intolerant” with high water needs, especially during summer. Water scarcity negatively affects plant growth and impairs cell metabolism, affecting the overall tree growth and the quality of produced fruit. Key factors that overall attempt to sustain and withstand the negative effect of salinity and drought stress are the extensive use of rootstocks in citriculture as well as the appropriate agronomical and irrigation practices applied. This review paper emphasizes and summarizes the crucial role of the above factors in the sustainability of citriculture.

scholarly journals Impact of “non-lethal” tarsal clipping on bumble bees (Bombus vosnesenskii) may depend on queen stage and worker size

2021 ◽  
Author(s):  
John M. Mola ◽  
Clara Stuligross ◽  
Maureen L. Page ◽  
Danielle Rutkowski ◽  
Neal M. Williams
Keyword(s):  
Genetic Material ◽  
Population Monitoring ◽  
First Year ◽  
Negative Effects ◽  
Worker Size ◽  
Monitoring Tools ◽  
Individual Survival ◽  
Body Sizes ◽  
Negative Effect ◽  
Worker Caste

Abstract Recent bumble bee declines have prompted the development of novel population monitoring tools, including the use of putatively non-lethal tarsal clipping to obtain genetic material. However, the potential side effects of tarsal clipping have only been tested in the worker caste of a single domesticated species, prompting the need to more broadly test whether tarsal clipping negatively affects sampled individuals. To determine if tarsal clipping reduces queen survivorship and colony establishment, we collected wild queens of Bombus vosnesenskii and clipped tarsi from a single leg of half the individuals. We reared captive queens and estimated survivorship and nest establishment success. We also clipped tarsi of workers from a subset of colonies across a range of body sizes. We found no consistent negative effect of clipping on queen survival. In the first year, clipped nest-searching queens suffered heavy mortality, but there was no effect on foraging queens. The following year, we found no effect of clipping on queen survival or establishment. Clipping did not reduce overall worker survival but reduced survivorship for those in the smallest size quartile. Implications for insect conservation Our findings suggest tarsal clipping does not have consistent negative effects on individual survival. However, our results varied with queen behavioral state, year, and worker size, suggesting differences within and among species and interactions with landscape stressors warrant further study. In the interim, we recommend researchers and conservationists minimize the use of tarsal clipping for sensitive species, populations, or small workers except in cases of exceptional scientific need.

scholarly journals Long-term subjective memory after electroconvulsive therapy

BJPsych Open ◽  
2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Robert Sigström ◽  
Axel Nordenskjöld ◽  
Anders Juréus ◽  
Caitlin Clements ◽  
Erik Joas ◽  
...  
Keyword(s):  
Electroconvulsive Therapy ◽  
Memory Impairment ◽  
Rating Scale ◽  
Final Analysis ◽  
Negative Effects ◽  
Subjective Memory ◽  
Subjective Memory Impairment ◽  
Negative Effect ◽  
Negative Expectations

Background There have been reports of long-term subjective memory worsening after electroconvulsive therapy (ECT). Aims To study the prevalence and risk factors of long-term subjective memory worsening among patients receiving ECT in routine clinical practice. Method Patients (n = 535, of whom 277 were included in the final analysis) were recruited from eight Swedish hospitals. Participants' subjective memory impairment was assessed before ECT and a median of 73 days after ECT using the memory item from the Comprehensive Psychopathological Rating Scale. Participants also rated their pre-ECT expectations and post-ECT evaluations of the effect of ECT on memory on a 7-point scale. We used ordinal regression to identify variables associated with subjective memory worsening and negative evaluations of the effect of ECT on memory. Results Comparisons of pre- and post-ECT assessments showed that subjective memory worsened in 16.2% of participants, remained unchanged in 52.3% and improved in 31.4%. By contrast, when asked to evaluate the effect of ECT on memory after treatment 54.6% reported a negative effect. Subjective memory worsening was associated with negative expectations before ECT, younger age and shorter duration of follow-up. Conclusions Although subjective memory improved more often than it worsened when assessed before and after ECT, a majority of patients reported that ECT had negative effects on their memory when retrospectively asked how ECT had affected it. This might suggest that some patients attribute pre-existing subjective memory impairment to ECT. Clinicians should be aware that negative expectations are associated with subjective worsening of memory after ECT.

scholarly journals Dominant Negative Mutants Implicate STAT5 in Myeloid Cell Proliferation and Neutrophil Differentiation

Blood ◽  
1999 ◽  
Vol 93 (12) ◽  
pp. 4154-4166 ◽  
Author(s):  
Robert L. Ilaria ◽  
Robert G. Hawley ◽  
Richard A. Van Etten
Keyword(s):  
Dna Binding ◽  
Transcriptional Activation ◽  
Dominant Negative ◽  
Dominant Negative Effect ◽  
Cytokine Signaling ◽  
Transactivation Domain ◽  
Negative Effects ◽  
Murine Bone Marrow ◽  
Negative Effect

Abstract STAT5 is a member of the signal transducers and activation of transcription (STAT) family of latent transcription factors activated in a variety of cytokine signaling pathways. We introduced alanine substitution mutations in highly conserved regions of murine STAT5A and studied the mutants for dimerization, DNA binding, transactivation, and dominant negative effects on erythropoietin-induced STAT5-dependent transcriptional activation. The mutations included two near the amino-terminus (W255KR→AAA and R290QQ→AAA), two in the DNA-binding domain (E437E→AA and V466VV→AAA), and a carboxy-terminal truncation of STAT5A (STAT5A/▵53C) analogous to a naturally occurring isoform of rat STAT5B. All of the STAT mutant proteins were tyrosine phosphorylated by JAK2 and heterodimerized with STAT5B except for the WKR mutant, suggesting an important role for this region in STAT5 for stabilizing dimerization. The WKR, EE, and VVV mutants had no detectable DNA-binding activity, and the WKR and VVV mutants, but not EE, were defective in transcriptional induction. The VVV mutant had a moderate dominant negative effect on erythropoietin-induced STAT5 transcriptional activation, which was likely due to the formation of heterodimers that are defective in DNA binding. Interestingly, the WKR mutant had a potent dominant negative effect, comparable to the transactivation domain deletion mutant, ▵53C. Stable expression of either the WKR or ▵53C STAT5 mutants in the murine myeloid cytokine-dependent cell line 32D inhibited both interleukin-3–dependent proliferation and granulocyte colony-stimulating factor (G-CSF)–dependent differentiation, without induction of apoptosis. Expression of these mutants in primary murine bone marrow inhibited G-CSF–dependent granulocyte colony formation in vitro. These results demonstrate that mutations in distinct regions of STAT5 exert dominant negative effects on cytokine signaling, likely through different mechanisms, and suggest a role for STAT5 in proliferation and differentiation of myeloid cells.

Sign in / Sign up

Export Citation Format

Share Document