Models,methods, and assumptions: The usefulness of a multi‐method approach to the examination of influence in TV pricing     

Benjamin J. Bates 《Journal of Media Economics》2013,26(1):49-66

The author explores the use of different mathematical modelsin considering influences on prices of television advertising rates and concludes that significant variability exists between models due to assumptions and level of data employed. The author argues that existing research on advertising price influences should be reconsidered in like of the differences among models, assumptions, and data used.  相似文献   

Breaking the structural logjam: The impact of cable on local TV market concentration     

Benjamin J. Bates 《Journal of Media Economics》2013,26(3):47-57

The author considers the effect of cable on market concentration in local television markets using different types of market definitions for the analysis. He concludes that cable has introduced competition and that it has lowered concentration levels in local markets, thus altering the structure of television markets put in place by FCC television allocation plans and limits of local economies.  相似文献   

A Method for Rapid Collection and Processing of Isokinetic Data     

Louis R. Osternig  James A. Sawhill  Barry T. Bates  Joseph Hamill 《Research quarterly for exercise and sport》2013,84(3):252-256

Abstract

This study verified earlier anecdotal evidence indicating that spatial assimilations could be reduced by offsetting movements in time. In Experiment 1, 40 right-handed participants (ages 18–23 years) made single and dual quick lever reversals of 20° and 60° with the left and right limbs, respectively. Participants were assigned to either the Overlapping (O) group, in which one limb began when the other limb reached the reversal point, or to the Sequential (S) group in which one limb followed the other with a delay of 114 ms, on average. The shorter-distance limb of the O group overshot relative to the S group. Short-distance spatial assimilations were also shown in the S group in Experiment 2, when the delay was increased to 250, 500, or 1,500 ms (N = 30), suggesting that assimilation effects can be caused by command interactions at both the planning and the execution levels.  相似文献   

Temperament Moderates Associations Between Exposure to Stress and Children's Externalizing Problems     

Alice C. Schermerhorn  John E. Bates  Jackson A. Goodnight  Jennifer E. Lansford  Kenneth A. Dodge  Gregory S. Pettit 《Child development》2013,84(5):1579-1593

The interaction between a temperament profile (four groups determined by high vs. low resistance to control [unmanageability] and unadaptability [novelty distress]) and family stress in predicting externalizing problems at school in children followed from kindergarten through eighth grade (ages 5–13) was investigated. The sample consisted of 556 families (290 boys). At Time 1 just prior to kindergarten, mothers retrospectively reported on their child's temperament during infancy. Each year, mothers reported stress and teachers reported children's externalizing problems. Temperament profile was tested as a moderator of the stress–externalizing association for various time periods. Results indicated that the combination of high resistance to control and high unadaptability strengthens the stress–externalizing association. Findings are discussed in terms of possible underlying mechanisms.  相似文献   

Bionic Woman (2007): gender, disability and cyborgs     

Margaret M. Quinlan  Benjamin R. Bates 《Journal of Research in Special Educational Needs》2009,9(1):48-58

This paper explores a representation of overlapping categories of gender, disability and cyborgs in Bionic Woman (2007). The television show Bionic Woman (2007) is a popular culture representation that uniquely brings together these categories. Three themes emerged from an analysis of blogger discourse surrounding the show. The themes reveal significant disempowering potentialities for women, individuals with and without disabilities and cyborgs. Conclusions and implications of these themes are offered.  相似文献   

Bond graph based sensitivity and uncertainty analysis modelling for micro-scale multiphysics robust engineering design     

M.A. Perry  R.A. Bates  H.P. Wynn 《Journal of The Franklin Institute》2008,345(3):282-292

Components within micro-scale engineering systems are often at the limits of commercial miniaturization and this can cause unexpected behavior and variation in performance. As such, modelling and analysis of system robustness plays an important role in product development. Here, schematic bond graphs are used as a front end in a sensitivity analysis based strategy for modelling robustness in multi-physics micro-scale engineering systems. As an example, the analysis is applied to a behind-the-ear (BTE) hearing aid.By using bond graphs to model power flow through components within different physical domains of the hearing aid, a set of differential equations to describe the system dynamics is collated. Based on these equations, sensitivity analysis calculations are used to approximately model the nature and the sources of output uncertainty during system operation. These calculations represent a robustness evaluation of the current hearing aid design and offer a means of identifying potential for improved designs of multiphysics systems by way of key parameter identification.  相似文献   

Exploring Young Children’s Understanding About the Concept of Volume Through Engineering Design in a STEM Activity: A Case Study     

Do-Yong Park  Mi-Hwa Park  Alan B. Bates 《International Journal of Science and Mathematics Education》2018,16(2):275-294

This case study explores young children’s understanding and application of the concept of volume through the practices of engineering design in a STEM activity. STEM stands for science, technology, engineering, and mathematics. However, engineering stands out as a challenging area to implement. In addition, most early engineering education research centers on curriculum and instruction rather than students’ understanding and application of models and content knowledge to a design project (Johri and Olds, Journal of Engineering Education, 100(1):151–185, 2011). For this study, we created a play-based STEM activity which helps students understand and apply the concept of volume in creating clay boats through the practices of engineering design. Three students voluntarily participated in this study. Data sources included interviews, photocopies of boats, and observation field notes which were analyzed using a comprehensive cross-case analysis. Findings indicate that the common pattern is rather intuitive when students define engineering problems using different criteria. Also, students’ solutions to engineering problems are associated with their experiential ideas of reality. How students express their understanding of volume is correlated to the way of their structuring volume. Lastly, students understand the concept of volume gradually while going through the practices of engineering design. Implications are discussed in terms of how engineering education contributes to students’ understanding of volume.  相似文献   

Peer rejection and social information-processing factors in the development of aggressive behavior problems in children   总被引：21，自引：0，他引：21  

Dodge KA  Lansford JE  Burks VS  Bates JE  Pettit GS  Fontaine R  Price JM 《Child development》2003,74(2):374-393

The relation between social rejection and growth in antisocial behavior was investigated. In Study 1,259 boys and girls (34% African American) were followed from Grades 1 to 3 (ages 6-8 years) to Grades 5 to 7 (ages 10-12 years). Early peer rejection predicted growth in aggression. In Study 2,585 boys and girls (16% African American) were followed from kindergarten to Grade 3 (ages 5-8 years), and findings were replicated. Furthermore, early aggression moderated the effect of rejection, such that rejection exacerbated antisocial development only among children initially disposed toward aggression. In Study 3, social information-processing patterns measured in Study 1 were found to mediate partially the effect of early rejection on later aggression. In Study 4, processing patterns measured in Study 2 replicated the mediation effect. Findings are integrated into a recursive model of antisocial development.  相似文献   

Researching the Transition to High School for Adolescents with a Disability: Qualitative Action-Project Method as an Exemplar Approach     

Sheila Marshall  Kristen Goessling  Richard Young  Agnieszka Wozniak-Molnar 《International Journal of Disability, Development & Education》2019,66(4):389-408

ABSTRACT

The transition from elementary to middle or high school is an important experience common to most adolescents in North America. However, very little research has been conducted to understand the experiences of students with a disability status and the stakeholders involved in the transition. Clearly, there is a need to generate information that views the transition as a process between students and stakeholders that takes place over time. This investigation illustrates the utility of the action-project method for studying the transition to middle or high school. Three cases involving Canadian adolescents with different disabilities (learning, sensory/motor and emotional/behavioural) and their parents, as key stakeholders, are presented.  相似文献   

Attachment for Infants in Foster Care: The Role of Caregiver State of Mind   总被引：1，自引：0，他引：1  

Mary Dozier  K. Chase Stoval  Kathleen E. Albus  & Brady Bates 《Child development》2001,72(5):1467-1477

The concordance between foster mothers' attachment state of mind and foster infants' attachment quality was examined for 50 foster mother-infant dyads. Babies had been placed into the care of their foster mothers between birth and 20 months of age. Attachment quality was assessed between 12 and 24 months of age, at least 3 months after the infants' placement into foster care. The two-way correspondence between maternal state of mind and infant attachment quality was 72%, kappa = .43, similar to the level seen among biologically intact mother-infant dyads. Contrary to expectations, age at placement was not related to attachment quality. Rather, concordance between maternal state of mind and infant attachment was seen for relatively late-placed babies, as well as early placed babies. These findings have two major implications. First, following a disruption in care during the first year and a half of life, babies appear capable of organizing their behavior around the availability of new caregivers. Second, these data argue for a nongenetic mechanism for the intergenerational transmission of attachment.  相似文献