Addition versus deletion as a signal

Subjects typically show superior discriminative performance when a distinguishing feature appears on reinforced rather than nonreinforced trials. The phenomenon is usually attributed to the relative predictiveness of the reinforcer by different stimulus elements. However, stimulus addition may be more effective than stimulus deletion as a signal. By removing the standard intertriai intervals, we made addition and deletion equally predictive of the reinforcer in four operant experiments involving between- and within-subject comparisons. Pigeons consistently performed better on operant discriminations when the addition rather than deletion of an auditory or visual stimulus served as the cue for food. This general finding persisted despite manipulation of the relative duration and localizability of the signal. Thus mere presence as opposed to absence plays a role in the feature-positive superiority, an outcome that may reflect a fundamental, biologically based difference between addition and deletion as effective signals of reinforcement.     

Systems of Classification and the Cognitive Properties of Grant Proposal Formal Documents

Despite the prominent role of application forms in the process of composing grant proposals, little attention has been given to the rhetorical and ethical implications of their prompts and instructions. This article analyzes classification systems reified within the cognitive properties of online forms that faculty members use to submit grant proposals. Results suggest that the historicity of proposal forms adds to the complexity of developing models that accurately represent proposal writing in multiple contexts.     

Methods and impact of correcting heart rate data errors during exercise in older adults

Heart rate (HR) by time curves could be useful as a measure of treatment fidelity (TF). The purposes were to describe the frequency of common recording irregularities (e.g. errors) observed during exercise, validate a process to correct those errors, and determine whether there is a clinically meaningful benefit to data correction. In total, 1895 exercise sessions from 69 older adults with hip fracture were inspected for errors in the placement of event markers (duration of exercise) and signal artifacts. Marker errors occurred in 33% of the participants and corrected in 324 sessions. Signal artifacts occurred in 96% of the participants and eliminated in 702 sessions. Computer code was 85% accurate in detecting signal artifacts, compared to 97% for investigators. HR was significantly higher after correction, but the average change was only 0.69 + 1.20 beats per minute. An HR monitor showing HR by time curves (HRxTC) can be used to evaluate TF during exercise.     

Policy as Boundary Object: A New Way to Look at Educational Policy Design and Implementation

Policy implementation research in general and educational policy in particular is loosely connected to policy-making processes. There is a gap particularly in the field of vocational education. This often leads to conflicts and contradictions between policy-maker objectives and end-user implementation. To avoid such a disconnect, the relation between the world of end users and the world of decision-makers should be carefully constructed. This might be done through connecting the process of decision-making to implementation and carefully developing methods that encompass the demands of decision-makers and the needs and informational requirements of end users. Our intensive case study research on the process of a vocational education reform in the marine sector confirms that the lack of robust connection and active engagement of implementers as the end-users in the design of the policy created challenges for its implementation. Using a theoretical framework based on the notion of boundary objects we bring an alternative to current practice by creating the potential to illuminate and remove tensions and challenges for policy implementation. From there we infer that adopting this concept for policy design may prevent such conflicts and contradictions and result in successful implementation.

Is EFL a Modern Trojan Horse？

THROUGHOUT China, the National language, Mandarin, is spoken by only 53% of the Chinese population （Yan 2005）, while most primary schools, and all middle and senior-middle schools, colleges and universities have mandatory English instruction （cf. Niu Qiang ＆ Martin Wolff 2004a）. Shakespeare says that ‘a rose by any other name would smell as sweet,＇ but linguistic imperialism - defined by Robert Phillipson （1992） as‘the dominance asserted and maintained by the establishment and continuous reconstitution of structural and cultural inequalities between English and other languages＇ - has had other economically optimistic and sen-sationalized names, such as.