Point subtraction aggression paradigm: validity of a brief schedule of use

The Point Subtraction Aggression Paradigm (PSAP) is a validated behavioral measure of aggression in response to provocation. Canonically, multiple sessions continue until performance asymptotes, requiring significant time. We sought to examine whether use of the PSAP-first-session ("PSAP-FS") had acceptable construct validity for group data, potentially expanding the settings in which the PSAP may be useful. One hundred male and female young adult subjects completed the PSAP-FS and additional behavioral measures of aggression, and provided information related to risk factors. The PSAP-FS correlated significantly with known risk factors of aggression. The PSAP-FS, which measures aggression in the present, correlated well with measures of recent aggression and less strongly with life history of aggression. The PSAP-FS had satisfactory validity properties for use where group-level data are of interest.     

Rebates, inventories, and intertemporal price discrimination

We demonstrate that universally redeemed rebates can increase manufacturer profits by reducing the incentives of downstream retailers to hoard inventories when optimal wholesale prices vary predictably over time. By bypassing retailers and making direct contracts with buyers, the manufacturer can increase the variations in effective prices paid by consumers without concomitantly creating larger incentives for retailers to hold inventories. During profitable, high-demand periods, manufacturer revenues are ordinarily constrained by'competition'from retailer inventories, thus limiting profits. However, by selectively offering rebates to consumers while maintaining high wholesale prices, low-demand periods can be accommodated without inducing retailer hoarding.     

Electronics: The new revolution

Electronics has produced a succession of remarkable accomplishments within the lifetime of living men. Yet, new developments in the field are so vast and exciting that they may be viewed as the advent of an Electronic Revolution comparable to the Industrial Revolution.     

Book Review

The prevalence of suicide suggests social workers will encounter clients at risk for suicide, but research shows social workers receive little to no training on suicide and suicide prevention and feel unprepared to work effectively with clients at risk. Baseline results from a randomized intervention study of the Question, Persuade, and Refer suicide prevention gatekeeper training with 73 advanced master’s of social work student interns show suicide knowledge was average, attitudes about suicide prevention were generally neutral, and use of suicide prevention practice skills was low. These results indicate an opportunity for enhancing student outcomes through training and inform social work education regarding necessary preparation for student interns and new graduates to identify and respond effectively to client suicide risk.     

Rising prices,financial statements and fundamental research

Adequate consideration cannot be given to the subject of inflation accounting without a rigorous reappraisal of the nature and usefulness of published financial statements. It is argued that much fundamental research is a necessary prerequisite for the evaluation of methods of accounting in a period of inflation. Such research should begin with a consideration of the purposes to be served by the publication of financial statements. A framework is presented for such fundamental research and the results of some preliminary work outlined to assess the usefulness of financial statements in providing information to assist investors to make investment decisions. The use of financial statements by investors for this purpose is one of a number of possible objectives for financial statements.     

Manufacturing productivity

The general theory of engineering systems suggests that to produce desired order (to make a machine that works, to reduce the entropy, or even to improve productivity) the agent needs access to sources of (i) information, or useful messages; (ii) energy, or motivation; (iii) resources, including skills. A manufacturing economy, being an engineering system, obeys the same rules, so that an objective examination of 11 of them may be instructive. Since Belgium has no native energy and very few native resources, her post-1968 success in raising her productivity suggests significant improvement in her information systems. The author suggests what this improvement may have been.     

Economic lot disposition policies for single attribute sampling plans

Traditionally, single sampling plans have provided but two possible lot disposition policies, either to (1) accept or reject and screen, or to (2) accept or reject and scrap. This is particularly true of statistical designs. Economically based plans, however, provide a framework wherein several lot disposition policies may be invoked in accordance with estimated lot quality. This paper illustrates how such designs may be realized.     

The nature of action learning

Action Learning has developed to such an extent that there is now a demand to ‘know’ what it is. There is one way, and one way alone, of getting to ‘know’ what action learning is, and that is by doing it. For those who most clamour to ‘know’ what something might be are usually the victims of an educational system that leaves the vast majority who pass through it ignorant of the meaning of the verb to ‘know’ .... If, for example, I am asked “Do you know that woman?”, it is most probable that the questioner does not ‘know’ what he is asking me. Does he mean “Do I know her name? Or where she lives? Or am I able to introduce him to her? Or what she does for a living? Or do I recognise her by sight? Or have I been to bed with her? And, if so, what progress did I make?...” Thus, with action learning: “Have I read a book about it? Or attended a seminar at which somebody was trying to sell places on an action learning programme? Or visited a set of participants meeting as part of such a programme? Or tried to organise real persons tackling real problems in real time, and trying thereby to learn with and from each other? Or been an active participant myself in such a programme?...” To ‘know’ what action learning is, one must have been responsibly involved in it; since this cannot have been done merely by reading about action learning, it is impossible in this, or any other, note to convey more than the vaguest impression of what this educational approach may be. The day action learning becomes explicable in words alone will be the day to abandon the practice of it.     

Exchange curves for fixing batch quantities

The problem considered is that of choosing batch quantities to minimize costs, subject to the constraints that neither overall set-up costs nor overall set-up time can be increased beyond certain limits. Theoretical and graphical solutions are obtained for two possible formulations of the problem, and a simple practical procedure is suggested.     

The Association of Birth Complications and Externalizing Behavior in Early Adolescents: Direct and Mediating Effects

Prior studies have shown that birth complications interact with psychosocial risk factors in predisposing to increased externalizing behavior in childhood and criminal behavior in adulthood. However, little is known about the direct relationship between birth complications and externalizing behavior. Furthermore, the mechanism by which the birth complications predispose to externalizing behavior is not well explored. This study aims to assess whether birth complications predispose to early adolescent externalizing behavior and to test whether Intelligence Quotient (IQ) mediates relationships between predictor and outcome variables. We used data from a prospective, longitudinal birth cohort of 1,795 3-year-old boys and girls from Mauritius to test hypotheses. Birth complications were assessed from hospital record data, malnutrition from a pediatric exam at age 3 years, psychosocial adversity from parental interviews at age 3 years, and externalizing behavior problems from parental ratings at age 11 years. We found that babies with birth complications are more likely to develop externalizing behavior problems at age 11. Low IQ was associated with birth complications and was found to mediate the link between early predictors and later externalizing behavior. These prospective, longitudinal findings have potential clinical implications for the identification of early adolescent externalizing behavior and for public health attempts to prevent the occurrence of child externalizing behavior problems.