Princesses are bigger than elephants: Effect size as a category error in evidence‐based education

Much of the evidential basis for recent policy decisions is grounded in effect size: the standardised mean difference in outcome scores between a study's intervention and comparison groups. This is interpreted as measuring educational influence, importance or effectiveness of the intervention. This article shows this is a category error at two levels. At the individual study level, the intervention plays only a partial role in effect size, so treating effect size as a measure of the intervention is a mistake. At the meta‐analytic level, the assumptions needed for a valid comparison of the relative effectiveness of interventions on the basis of relative effect size are absurd. While effect size continues to have a role in research design, as a measure of the clarity of a study, policy makers should recognise the lack of a valid role for it in practical decision‐making.     

Face Detection and the Development of Own‐Species Bias in Infant Macaques

In visually complex environments, numerous items compete for attention. Infants may exhibit attentional efficiency—privileged detection, attention capture, and holding—for face‐like stimuli. However, it remains unknown when these biases develop and what role, if any, experience plays in this emerging skill. Here, nursery‐reared infant macaques' (Macaca mulatta; n = 10) attention to faces in 10‐item arrays of nonfaces was measured using eye tracking. With limited face experience, 3‐week‐old monkeys were more likely to detect faces and looked longer at faces compared to nonfaces, suggesting a robust face detection system. By 3 months, after peer exposure, infants looked faster to conspecific faces but not heterospecific faces, suggesting an own‐species bias in face attention capture, consistent with perceptual attunement.     

Diversity Knowledge in Science Teacher Education-Translating Concept to Instruction: An Example Specific to African Americans

Science education reforms promote access to quality science education for all students. Outcome disparities in various measures indicate that such access remains elusive for African Americans. Cultural incongruence is one among many explanations for this previously described inaccessibility. The intent of this article is not to report additional research findings, but to translate the information provided in the literature into an instructional form that science teacher educators can employ in the preparation of prospective science teachers or the further development of practicing ones. Pivoting around a role play, the authors discuss communication within African American communities, its incongruence with the discourse patterns typically valued and reinforced in school science, and the importance of such knowledge for science teacher educators. Lieutenant Colonel Stephanie Foster is now product manager in the U.S. Army Research Development and Engineering Command.

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Success at Scale: Outcomes of Community-Based Neurodevelopment Intervention (CASITA) for Children Ages 6–20 months With Risk of Delay in Lima,Peru

This study is a randomized controlled trial of a 12-week community-based group parenting intervention (“CASITA”) in Lima, Peru. CASITA improved neurodevelopment in a pilot study of 60 Peruvian children and subsequently scaled to 3,000 households throughout the district. The objective of this study was to assess intervention effectiveness when implemented at scale. A total of 347 children ages 6–20 months (52.7% male, 100% identified as “mestizo”) at risk for developmental difficulties were randomized to immediate or delayed CASITA. At 3 months after enrollment, the immediate arm showed significantly higher overall development, based on the Extended Ages and Stages Questionnaire and Home Observation for Measurement of the Environment scores (Cohen’s ds = .36 and .31, respectively). Programs demonstrably effective at scale could help address children’s development risks worldwide.     

Paraprofessionals use of group school-based instrumental mentoring: Examining process and preliminary outcomes

Many schools use paraprofessionals to implement and monitor interventions. Though paraprofessionals are cost-effective, many questions remain about the training and skills they need to implement a wide array of school-based interventions. In this study, we compare paraprofessionals' (i.e., undergraduates) implementation of the Group-Academic Mentoring Program for Education Development (Group-AMPED) to school psychology graduate students' implementation of Group-AMPED. Ten paraprofessionals and five school psychology graduate students provided approximately eight sessions of Group-AMPED to 35 sixth-grade students. Results indicated no significant differences between middle school students' engagement when groups were led by either school psychology graduate students or paraprofessionals. Similarly, self-reports of fidelity and supervisor postsession implementation confidence indicated no difference between paraprofessionals and graduate students' implementation of Group-AMPED. Follow-up measures indicated that mentors and proteges perceived Group-AMPED as feasible, acceptable, and understandable. Most importantly, middle school students participating in Group-AMPED had significantly higher second-semester grades in comparison to a small control group.     

Physiological variables and performance markers of serving soldiers from two "elite" units of the British Army

The aim of this study was to compare selected physiological variables and performance markers of soldiers from two "elite" units of the British Army. Ten soldiers from each of the two units were recruited for this study (n = 20). All participants completed three tests while carrying a 20 kg backpack load: (1) a maximal treadmill test using the Bruce protocol; (2) a 2 mile backpack run test specific to Unit A on a consistently flat tarmac road; and (3) a 29 km time-trial over hilly terrain typical of a mountainous area used by Unit B for performance assessment. Heart rate, maximal blood lactate concentration and performance (run time) were assessed during all three tests, with peak oxygen uptake also being measured during the maximal treadmill test. Measurements of anthropometry, isokinetic strength and mental toughness (MT48) were also recorded. There were no significant differences in terms of performance markers between the units (P > 0.05). Performance on the maximal treadmill test correlated with performance on the 2 mile backpack run test (r = -0.57) and 29 km time-trial (r = -0.66). Performance on the 2 mile backpack run test in turn correlated with 29 km time-trial performance (r = -0.77), accounting for 59% of the variance. In conclusion, the maximal treadmill test and the 2 mile backpack run test are useful indicators of performance on the arduous hill march and could be employed in the screening and selection of potential recruits.     

Parents' mainstreaming modification preferences for children with educable mental handicaps,behavior disorders,and learning disabilities

Parents of children with educable mental handicaps, behavior disorders, and learning disabilities completed a questionnaire on the types and numbers of program modifications needed to persuade them to accept full-time mainstreaming for their exceptional children. Results suggest that successful full-time mainstreaming requires parent involvement. Contingent upon recognition and implementation of their recommendations for mainstreaming, most parents are supportive of full-time integration of their mildly handicapped children in regular classrooms. Parents' specific mainstreaming recommendations are discussed along with educational reform implications.     

Effects of a Supplemental Vocabulary Intervention on the Word Knowledge of Kindergarten Students At Risk for Language and Literacy Difficulties

The purpose of this study was to examine the effectiveness of a vocabulary intervention designed to supplement research‐based classroom vocabulary instruction, implemented with students who may be at risk for language and learning difficulties. Participants included 43 kindergarten students who received research‐based classroom vocabulary instruction. Students with the 20 lowest scores on the Peabody Picture Vocabulary Test‐III administered at pretest received additional small‐group supplemental vocabulary intervention. Results of within‐subjects comparisons indicated that, overall, at‐risk students made greater gains in word knowledge on target words that received the supplemental intervention as compared to words that received only classroom‐based instruction. In addition, at‐risk students who received the supplemental intervention demonstrated word‐learning gains that approached those of their peers who received classroom instruction alone. Implications along with limitations of the current study and directions for future research are discussed.