Choice behavior in transition: Development of preference in a free-operant procedure

Twenty acquisition curves were obtained from each of 8 pigeons in a free-operant choice procedure. Every condition began with a phase in which two response keys had equal probabilities of reinforcement, and, as a result, subjects’ responses were divided fairly evenly between the two keys. This was followed by a phase in which one key had a higher probability of reinforcement than the other, and the development of preference was observed. In all but a few cases, response proportions increased for the key with the higher probability of reinforcement. In most conditions, the two probabilities differed by .06, but the actual probabilities varied (from .16 and .10 in one condition to .07 and .01 in another). Development of preference for the key with the higher probability of reinforcement was slower when the ratio of the two reinforcement probabilities was small (.16/.10) than when it was large (.07/.01). This finding is inconsistent with the predictions of several different quantitative models of acquisition, including the kinetic model (Myerson & Miezin, 1980) and the ratio-invariance model (Horner & Staddon, 1987). However, the finding is consistent with a hypothesis based on Weber’s law, which states that the two alternatives are more discriminable when the ratio of their reinforcement probabilities is larger, and, as a result, the acquisition of preference is faster.     

Caregiving as refusal in the academy*

Abstract

Literature on American Indian student support in postsecondary education illustrates the importance of relationality in creating a positive college experience for Native students. That said, much of the literature examining ‘care relationships’ in Indian education focuses on student outcomes, with less attention given to the experiences of practitioners. Thus, the purpose of this paper is twofold. First, the author examines where and how American Indian higher education practitioners learned principles of communal care for supporting Indigenous students in non-Native postsecondary institutions. Second, she explores how these principles act as homesteads of mutuality to love, transform, resist, and enact refusal within the academy. She draws upon the literature on American Indian student support in postsecondary education, which illustrates the importance of relationality in creating a positive college experience for Native students.     

In between home and homeland: Diaspora identity as a cultural hybrid in Mohsen Namjoo’s “Cielito Lindo”

ABSTRACT

Rather than resisting either new or old culture, Iranian musicians in the diaspora embrace both their new host environments and their native homeland, as they create a place between cultural assimilation and preservation, helping to shape new sounds of exile. This essay explores how Iranian musicians embrace the new and the familiar, the traditional and the popular, creating an original cultural hybrid. Questions of cultural identity and the politics of location and displacement are addressed using a theoretical cultural studies framework, incorporating themes of personal and collective nostalgia. This discussion is supplemented by documented narrative experiences from Iranian musicians and artists. Furthermore, the textual and musical analysis of singer-songwriter Mohsen Namjoo’s readaptation of the familiar Mexican ranchera song “Cielito Lindo” uncovers unique nuances and layers of meaning that not only shed light on one musician’s personal journey to exile, but also speak to a greater collective experience of Iranians today who continue to be torn between home and homeland.     

“Can't Nobody Sleep” and Other Characteristics of Culturally Responsive English Instruction

In this article the author presents a collective case study of two English teachers identified as particularly successful with Black students. Through the use of ethnographic techniques, the study provides a snapshot of how these teachers facilitated academic gains in urban high schools through their use of culturally responsive English instruction.     

Heart rates of high school physical education students during team sports, individual sports, and fitness activities

This study examined how activity type influenced heart rates and time spent in target heart rate zones of high school students participating in physical education classes. Significantly higher average heart rates existed for fitness (142 +/- 24 beats per minute [bpm]) compared to team (118 +/- 24 bpm) or individual (114 +/- 18) activities. Similar results occurred for the percentage of activity time spent within a target heart rate zone (fitness 81.7 +/- 15.9%, individual 68.4 +/- 30.5%, and team 60.6 +/- 30.5%). Boys attained higher heart rates during team activities, while female students had higher rates during individual activities indicating male and female adolescents respond differently to activity types. The highest mean heart rates were observed during fitness activities.     

FROM DOUBLE JEOPARDY TO DOUBLE INDEMNITY: SUBTLETIES OF TEACHING INTERDISCIPLINARY GERIATRICS

Each of the fields of geriatrics and interdisciplinary practice intensifies the usefulness and effectiveness of the other. Combining geriatrics and interdisciplinary practice also magnifies the complexity of two singularly complex fields. However, the subtle reasons for their complexity may escape the understanding of clinicians, educators, policy makers, and administrators. Attempting to treat older patients who have complex problems while ignoring common principles of geriatrics and teamwork can cause a kind of double jeopardy. It can potentially harm the patient and decrease the provider's sense of mastery. Training either students or health care providers to appreciate the interactions and the complexities of these two fields could produce a double indemnity for the health care system and for older persons who need health care. It requires recognizing subtle factors like the barrier of presumed knowledge, the interpretation of the meaning of function, frailty, the lure of medical technology, professional hierarchies, diverse views of disease, and the myth of insufficient evidence.     

Evaluating digital libraries in the health sector. Part 2: measuring impacts and outcomes

This is the second part of a two-part paper which explores methods that can be used to evaluate digital libraries in the health sector. Part 1 focuses on approaches to evaluation that have been proposed for mainstream digital information services. This paper investigates evaluative models developed for some innovative digital library projects, and some major national and international electronic health information projects. The value of ethnographic methods to provide qualitative data to explore outcomes, adding to quantitative approaches based on inputs and outputs is discussed. The paper concludes that new 'post-positivist' models of evaluation are needed to cover all the dimensions of the digital library in the health sector, and some ways of doing this are outlined.     

Evaluating digital libraries in the health sector. Part 1: measuring inputs and outputs

This is the first part of a two-part paper which explores methods that can be used to evaluate digital libraries in the health sector. In this first part, some approaches to evaluation that have been proposed for mainstream digital information services are examined for their suitability to provide models for the health sector. The paper summarizes some major national and collaborative initiatives to develop measures for digital libraries, and analyses these approaches in terms of their relationship to traditional measures of library performance, which are focused on inputs and outputs, and their relevance to current debates among health information specialists. The second part* looks more specifically at evaluative models based on outcomes, and models being developed in the health sector.