An Analysis of Aptitude as a Predictor of Achievement in an Individualized Mode of Health Instruction

This author questions the traditional relationship between aptitude and achievement in an individualized mode of health instruction. Measures were taken on time in instruction, gain scores from pre- to post-tests and score on the American College Test Battery on 120 students in an open learning centre. An individualized mode of instruction was used with printed and mediated materials. An analysis of these data indicated that time was a more significant predictor of gain than aptitude. As students spent more time in this programme, their gain scores increased. This seems to be typical of the learning theory.     

Alternate eye suppression and reading ability: little or no effect

The relationship between visual disorders and reading disability has been a source of controversy. Although much has been written, few clear relationships have been established. This study examined a particular visual disorder, alternating the use of the eyes. It has been generally assumed in the professional literature that eye alternation has a negative impact on a child's ability to read and perform visual-motor tasks. To date, however, this assumption is without scientific validation. The purpose of this study was to determine whether alternating the use of the eyes does in fact have a negative effect on reading ability and on timed visual-motor tasks. Forty school-aged children, aged six to 14, were selected from the patient population of four ophthalmologists. Twenty alternators, whose ocular conditions were verified by ophthalmologic examination, were obtained. The control group was obtained by matching children with normal eye exams to the alternators. All subjects were given the WISC-R (Wechsler, 1974) and the Woodcock Reading Mastery Tests, Form B (1973). Results of the study indicated that the reading achievement of eye alternators was no different than it was for visually normal children. Also, alternators are no more likely to have difficulty with the visual-motor tasks. Although alternators may score poorly on vision screening tests, there is no indication that their visual problems will affect their school achievement.     

Retrospective cytological evaluation of indeterminate thyroid nodules according to the British Thyroid Association 2014 classification and comparison of clinical evaluation and outcomes

The cytology of 130 indeterminate nodules (Thy 3) was retrospectively reviewed according to the British Thyroid Association 2014 classification. Nodules were divided into Thy 3a (atypical features) and Thy 3f (follicular lesion) categories. Histology was available as a reference for 97 nodules. Pre-surgical evaluations comprised biochemical tests, color-Doppler ultrasonography (US), semi-quantitative elastography-US (USE), contrast-enhanced US (CEUS), and mutation analysis from cytological slides. Thyroid malignancy was the final diagnosis for 19% of surgically-treated nodules. No statistically significant difference in the risk of malignancy was found between Thy 3a (26%) and Thy 3f (14%) nodules. Histology of the Thy 3a and Thy 3f nodules showed a higher incidence of Hurtle cell adenomas in Thy 3f (29%) than in Thy 3a (3%) nodules (P=0.01). The only pre-surgical difference concerned the BRAF V600E mutation, which was positive in some Thy 3a but not in any Thy 3f nodules (P=0.04). Receiver-operating characteristic (ROC) analysis was used to obtain cut-off values from US (score), USE (ELX 2/1 strain index), and CEUS (time-topeak index and peak index) data. The cut-off values were similar for Thy 3a and Thy 3f nodules. Data showed that malignancy can be suspected if the US score is >2, ELX 1/2 strain index >1, time-to-peak index >1, and peak index <1. In a sub-group of 24 revised nodules (12 Thy 3a and 12 Thy 3f) with histology as a reference, the diagnostic power of cumulative pre-surgical analysis by means of US, USE, and CEUS showed high positive and negative predictive values (83% and 100%, respectively) for the presence of malignancy in Thy 3a and Thy 3f nodules. In conclusion, in our series of revised Thy 3 nodules, malignancy was low and displayed no significant differences between Thy 3a and Thy 3f categories. The use of cut-offs based on histology as a reference could reduce surgery. Our data support the conviction that, in mutation-negative Thy 3a and Thy 3f nodules, observation should be the first choice when not all instrumental results are suspect.     

Longitudinal comparisons of wechsler scales in educable mentally handicapped children and adults

The change in IQ scores over an extended period of time (approximately 17 years) of subjects who had been placed in classes for the Educable Mentally Handicapped was investigated. Analysis indicated that a significant difference existed between WISC scores administered at the time of initial placement (mean age, 11–9) and WAIS scores administered at a later date (mean age, 17–6). In addition, although a difference was revealed with respect to WAIS scores when the students were divided into two groups based upon initial WISC scores (⩽70 vs. >70), it was determined that the change was in a uniform fashion over time; i.e., neither regression nor interaction effects were detected. A final analysis revealed that those students who were located for a follow-up testing approximately 10 years later (mean age 28–8) continued to show a significant increase in IQ scores. The importance placed upon IQ scores for initial placement of students in EMH programs appears to remain suspect.     

Illustrating the Utility of Differential Bundle Functioning Analyses to Identify and Interpret Group Differences on Achievement Tests

What is differential bundle functioning and how is this different from differential item functioning? Can test specifications be used to identify and aid in the interpretation of differential bundle functioning? How can differential bundle functioning lead to an improved understanding of why groups perform differently on achievement tests?     

Investigation of toppling ball flight in American football with a mechanical field-goal kicker

A mechanical field-goal kicking machine was used to investigate toppling ball flight in American football place-kicking, eliminating a number of uncontrollable impact variables present with a human kicker. Ball flight trajectories were recorded using a triangulation-based projectile tracking system to account for the football’s 3-dimensional position during flight as well as initial launch conditions. The football flights were described using kinematic equations relating to projectile motion including stagnant air drag and were compared to measured trajectories as well as projectile motion equations that exclude stagnant air drag. Measured football flight range deviations from the non-drag equations of projectile motion corresponded to deficits between 9 and 31%, which is described by a football toppling compound drag coefficient of 0.007 ± 0.003 kg/m. Independent variables including impact location and impact angle orientation resulted in 15 impact conditions. We found that an impact location of 5.5 cm from the bottom of the ball maximized trajectory height and distance. At the 5.5-cm impact location, alterations in impact angle produced minimal change in football trajectory, including launch angle (range = 1.96 deg), launch speed (range = 1.06 m/s), and range (range = 0.94 m).     

Character and organization

In recent years, questions of ‘character’ have become increasingly prominent in a range of policy contexts, from education to social welfare and from business to healthcare. What unites these various contemporary paens is an assumption that building ‘character’ is a crucial component of ethics and that it holds the key to establishing and maintaining virtuous conduct; moreover, that the cultivation of ‘character’ is at best under-valued and at worst actively undermined and denigrated in any number of contemporary economic and organizational practices. In this paper, we seek to interrogate key aspects of this upsurge of interest in ‘character’ as it has been articulated in particular recent and on-going debates about the reform of organizational life. We argue that this ‘turn’ suffers precisely from an abstraction and lack of contextual specificity – not simply in relation to questions of ‘character formation,’ but also in regard to matters of organization, and indeed the relationship of the one to the other – that severely curtails both its ethical reach and explanatory power.