Effective Action by Infants to Contact Objects by Reaching and Leaning

The ability of infants aged 8–12 months to coordinate their arm and trunk movements to contact an object located in different positions was investigated in 2 experiments. In the first, 8- and 10-month-old infants reached for near objects but both reached and leaned for more distant ones indicating that they perceived that forward leaning extends the range of contact beyond that of reaching alone. In addition, arm and trunk movements were initiated simultaneously; visual information concerning object distance was sufficient to activate an integrated reaching-and-leaning response. Object distances were increased and a mechanical aid was provided on half the trials in the second experiment with 10- and 12-month-old infants. For both age groups the degree of leaning was reduced for objects that were out of reach without the aid. Only older infants were able to use the aid to extend partially their range of contact. Overall the results support the conclusions that, by at least 8 months, infants perceive that leaning extends their effective reaching space; by 10 months they perceive the limits within which reaching together with leaning is likely to be effective; and by 12 months they begin to perceive how this space may be extended by a mechanical aid.     

Can squirrel monkeys (Saimiri sciureus) plan for the future? Studies of temporal myopia in food choice

In seven experiments, 2 squirrel monkeys were given choices between arrays of food that varied in the quantity offered. In Experiments 1-5, the monkeys were offered choices between quantities of the same food that varied in a 2:1 ratio. The squirrel monkeys failed to show the temporal myopia effect or a decrease in preference for the larger quantity as the absolute number of food items offered increased. Even when given choices of 8 versus 16 peanuts and 10 versus 20 peanuts, both monkeys significantly preferred the larger quantity. An examination of the monkeys' rates of consumption indicated that 20 peanuts were consumed over a 1- to 2-h period, with eating bouts separated by periods of nonconsumption. In Experiments 6A, 6B, and 7, food was either pilfered or replenished 15 min after an initial choice, so that choice of the smaller quantity led to more total food in the long run. These manipulations caused both monkeys to reduce choice of the larger quantity, relative to baseline choice. The results suggest that squirrel monkeys anticipated the future consequences of their choices.     

The use of video-based instruction to promote independent performance of physical activity skills in students with developmental disabilities in a school and community setting

School psychologists are well-positioned to assist practitioners in engaging students in physical activity (PA) which can increase student access to improved well-being and associated health benefits. This may be of particular importance for adolescents with moderate to severe developmental disabilities (DD; autism and intellectual disability) who display various deficits in performing PA skills. Previous research suggests video-based instruction (VBI) effectively facilitated independence associated with PA skills in people with DD, however, additional research is warranted. The purpose of this study was to evaluate the degree a VBI impacted acquisition of skills in individuals with DD at school, and, subsequently, in a community setting. Multiple probe design was used to assess the effect of the intervention in four participants. The results indicate the intervention was effective in teaching three participants to perform the circuit in the school setting and transfer the skills to the community setting; however, maintenance was variable. Implications related to practice for school psychologists, teachers, and other practitioners, as well as, limitations and future research directions are discussed.     

Maximal work production following two levels of artificially induced metabolic alkalosis

In order to determine the influence of two artificially induced alkalotic states on the ability to perform maximal exercise, six male subjects (mean age, 22.0 years; mean height, 176.8 cm; mean weight, 69.1 kg; mean VO2 max, 3.83 l min-1) were studied during three experimental trials. The subjects performed six 60-s cycling bouts, at a work rate corresponding to 125% VO2 max, with 60 s recovery between work bouts; these regimens were performed 1 h after the ingestion of a solution containing either; I, placebo; II, NaHCO3 in a dosage of 0.15 g per kg body weight; or III, NaHCO3 0.30 g per kg body weight. The sixth work bout was continued until the pedal velocity dropped below 50 rev min-1. Total work done for the entire work period was calculated. Blood samples were taken from a forearm vein prior to the exercise bouts for analysis of pH and HCO3. The results showed a significant pre-exercise difference in pH and HCO3 for all conditions (P less than 0.01). In conditions where artificial alkalosis had been achieved prior to exercise there was significant increase in the work produced: I, 121.6 kJ; II, 133.1 kJ; III, 133.5 kJ (P less than 0.05). The time to fatigue in the six bout was also significantly increased; I, 74.7 s; II, 111.0 s; III, 106.0 p (P less than 0.05). There were no significant differences between conditions II and III. Thus augmentation of the bicarbonate reserves has a significant positive effect on the energy metabolism in interval-type exercise, leading to an increase in the work done and in the time to fatigue.(ABSTRACT TRUNCATED AT 250 WORDS)     

Equity Traps Redux: Inequitable Access to Foreign Language Courses for African American High School Students

Although much of the current educational research literature on achievement gaps has focused on core curricular areas in public schools, few have focused on racially identifiable gaps in non-core areas such as high school foreign languages. These achievement, and thus advancement, gaps often result in the under-representation of students of color in higher level foreign language classes. This can have long-range negative consequences for students, such as lacking the foreign language credits needed for admission into major universities. Thus, in this qualitative study, we researched the perceptions of teachers, counselors, and school leaders at a racially diverse urban high school in central Texas concerning the enrollment, achievement, and advancement of African American students in high school foreign language courses. The results indicate that equity traps—deficit views, racial erasure, and paralogical beliefs and behaviors—advanced over a decade ago (McKenzie &; Scheurich, 2004 McKenzie, K. B., &; Scheurich, J. J. (2004). Equity traps: A useful construct for preparing principals to lead schools that are successful with racially diverse students. Educational Administration Quarterly, 40(5), 601–632.[Crossref], [Web of Science ®] , [Google Scholar]) are continuing and even thriving among teachers, counselors, and school leaders in public schools. These equity traps contribute to the foreign language achievement gap, resulting in diminished educational opportunities for African American students. Moreover, we propose that an additional equity trap is at play—organizational constraints—which are the structural obstacles that serve to abet and perpetuate the negative beliefs, behaviors, attitudes, and assumptions exposed in the original equity traps. We conclude this article with recommendations for policy makers and practitioners and offer direction for future research.     

Implementation of Educational Provision for Children with Severe to Profound Intellectual Disability in the Western Cape: From Rights to Reality

Children with severe to profound intellectual disability have been excluded from education on the basis that their impairment makes them ‘ineducable’. The Western Cape Forum for Intellectual Disability challenged this notion through litigation against the South African Government. The ensuing judgement asserts the right to education of these children and outlines action steps for government to this end. We describe the actions taken by the Western Cape Education Department in responding to the requirements of the court by means of a document review. We then reflect on the implementation process, highlighting key learning points of relevance for others engaged in implementation. We note critical factors to be considered for the child, their families, special care centres, and the broader educational and legal systems. We conclude by outlining important considerations for the inclusion of these children within the education system in South Africa.     

Childhood movement skills: predictors of physical activity in Anglo American and Mexican American adolescents?

We assessed the relationship between young children's movement skills and their physical activity in early adolescence. Balance, agility, eye-hand coordination, and skinfold thicknesses in 207 Mexican American and Anglo American children (104 boys, 103 girls) were measured at ages 4, 5, and 6 years. Habitual physical activity was assessed at the age of 12 years by two interviewer-administered 7-day recalls. Ethnic differences in movement skills were not found. Young girls were better at jumping and balancing, and young boys were better at catching. Tracking of skills was low, and children's early childhood skills were not related to their physical activity 6 years later. Further studies involving additional movement skills and other populations are recommended to determine if enhanced movement skills in children promote subsequent physical activity.