Method of solving differential equations with constant coefficients

The equation developed here is fundamental for an understanding of the behavior of inhomogeneous insulation, especially when the insulating material is of considerable extent in the form of continuous flat sheets, or cables, or discontinuous form as in pole-line construction. The “unit” may then be measured in terms of area in the case of sheets, and in terms of length in the case of cables. It is of basic importance in insulation research, testing, and operation. It furnishes the logical basis for the establishing of safety factors.     

Beliefs,Practices, and Reflection: Exploring a Science Teacher’s Classroom Assessment Through the Assessment Triangle Model

This paper describes the Assessment Practices Framework and how I used it to study a high school Chemistry teacher as she designed, implemented, and learned from a chemistry lab report. The framework consists of exploring three teacher-centered components of classroom assessment (assessment beliefs, practices, and reflection) and analyzing components with the assessment triangle model (Pellegrino et al. in, Knowing what students know: The science and design of educational assessment. National Academy Press, Washington DC, 2001). Employing the framework, I report the teacher’s assessment practices, report the alignment in her assessment practices through the three vertices of the assessment triangle (cognition, observation, and interpretation), and suggest relations between her beliefs and practices. I conclude by discussing the contribution and limitations of the Assessment Practices Framework while conducting future research and supporting science teachers in assessing student learning.     

Facing the future: Seeking ethics for everyday surveillance

Surveillance has become a routine, everyday occurrence ininformational societies. Many agencies have an interest in personal data, and a wide spectrum of them use searchabledatabases to classify and catalogue such data. From policingto welfare to the Internet and e-commerce, personal data havebecome very valuable, economically and administratively. Whilequestions of privacy are indeed raised by such surveillance,the processes described here have as much to do with social sorting,and thus present new problems of automated categorization of datasubjects. Privacy and data protection measures do address someof the questions raised, but they tend to be limited to individualisticreadings of the situation, and not to consider issues of fairnessand equality. An ethics for everyday surveillance is proposed thatconsiders personhood as central, but highlights its social andembodied dimensions. Reductionism of practice and of analysisis thus avoided as the face comes to the fore. Hence the title.     

Young Children's Understanding of Forgetting over Time

2 studies investigated young children's understanding that as the retention interval increases, so do the chances that one will forget. In Study 1 (24 3-year-olds and 24 4-year-olds), 4-year-olds but not 3-year-olds understood that of 2 characters who simultaneously saw an object, the character who waited longer before attempting to find it would not remember where it was. In study 2 (24 3-year-olds and 24 4-year-olds), 4-year-olds but not 3-year-olds understood that of 2 objects seen by a character, the object that was seen a "long long time ago" would be forgotten and the object seen "a little while ago" would be remembered. The findings are discussed in relation to research on young children's understanding of the acquisition, retention, and retrieval of knowledge over time.     

Coaching, truth induction, and young maltreated children's false allegations and false denials

This study examined the effects of coaching (encouragement and rehearsal of false reports) and truth induction (a child-friendly version of the oath or general reassurance about the consequences of disclosure) on 4- to 7-year-old maltreated children's reports ( N = 198). Children were questioned using free recall, repeated yes–no questions, and highly suggestive suppositional questions. Coaching impaired children's accuracy. For free-recall and repeated yes–no questions, the oath exhibited some positive effects, but this effect diminished in the face of highly suggestive questions. Reassurance had few positive effects and no ill effects. Neither age nor understanding of the meaning and negative consequences of lying consistently predicted accuracy. The results support the utility of truth induction in enhancing the accuracy of child witnesses' reports.     

Eliciting Maltreated and Nonmaltreated Children's Transgression Disclosures: Narrative Practice Rapport Building and a Putative Confession

This study tested the effects of narrative practice rapport building (asking open‐ended questions about a neutral event) and a putative confession (telling the child an adult “told me everything that happened and he wants you to tell the truth”) on 4‐ to 9‐year‐old maltreated and nonmaltreated children's reports of an interaction with a stranger who asked them to keep toy breakage a secret (n = 264). Only one third of children who received no interview manipulations disclosed breakage; in response to a putative confession, one half disclosed. Narrative practice rapport building did not affect the likelihood of disclosure. Maltreated children and nonmaltreated children responded similarly to the manipulations. Neither narrative practice rapport building nor a putative confession increased false reports.     

Development of temporal-reconstructive abilities

In a study of the ability to reconstruct the times of past events, 86 children from 4 to 13 years recalled the times of 2 in-class demonstrations that had occurred 3 months earlier and judged the times of hypothetical events. Many of the abilities needed to reconstruct the times of events were present by 6 years, including the capacity to interpret many temporally relevant cues, but there were substantial changes well into middle childhood in the availability of temporally useful episodic information. Children were poor at remembering the events' proximity or order with respect to a major holiday, but the order of the 2 target events was well recalled by 6 years.