The Effects of Multitasking on Operations Scheduling

This study considers a typical scheduling environment that is influenced by the behavioral phenomenon of multitasking. Under multitasking, the processing of a selected job suffers from interruption by other jobs that are available but unfinished. This situation arises in a wide variety of applications; for example, administration, manufacturing, and process and project management. Several classical solution methods for scheduling problems no longer apply in the presence of multitasking. The solvability of any scheduling problem under multitasking is no easier than that of the corresponding classical problem. We develop optimal algorithms for some fundamental and practical single machine scheduling problems with multitasking. For other problems, we show that they are computationally intractable, even though in some cases the corresponding problem in classical scheduling is efficiently solvable. We also study the cost increase and value gained due to multitasking. This analysis informs companies about how much it would be worthwhile to invest in measures to reduce or encourage multitasking.     

Ranking of the Most Prolific Authors,Universities, and Organizations in the Journal of Organizational Behavior Management

ABSTRACT

Over the years, reviews in behavior analysis have sought to identify the most prolific researchers and institutions. The goal of these reviews was to offer one resource for behavior analysts to identify experts in behavior analysis and quality graduate programs. However, most of these reviews omitted the Journal of Organizational Behavior Management (JOBM), making the results less relevant to those who work in organizational behavior management. The purpose of this review was to extend previous findings and identify the most published researchers, academic institutions, and organizations in JOBM since its inception. Furthermore, we calculated the citation rate (per year, per article) for each of the top 20 most published authors. The results, implications, and opportunities for further analysis are discussed.     

Identifying Mental Disorder from the Faces of Women with Borderline Personality Disorder

Although appearance-based cues can help to diagnose physical illness, visual manifestations of mental disorder may be more elusive. Here, we investigated whether individuals could distinguish women with a serious mental disorder (borderline personality disorder) from demographically- and IQ-matched non-psychiatric controls. Participants rated mentally ill targets as more likely to have a mental disorder from photos more accurately than chance, despite not believing that such judgments were possible. The configuration of facial cues played an important role in these judgments, as interfering with the spatial relationships between facial features reduced participants’ accuracy to chance guessing. Further investigation showed similar results when participants rated the targets for specific mental disorders (borderline personality disorder, major depressive disorder) and rated the mentally ill targets as more depressed, angry, anxious, disgusted, emotionally unstable, distressed, and less happy. Moreover, the depression ratings significantly correlated with the targets’ actual depressive symptoms. Thus, individuals may be able to infer aspects of mental disorder from minimal facial cues.     

RACE AND EMPLOYMENT OUTCOMES: EVIDENCE FROM NBA COACHES

We study the impact of management diversity on employment outcomes using data on NBA head coaches that includes information on the race of each coach and his supervisor. We find that a supervisor is more likely to hire a coach of his own race. We also find that black coaches are less likely to be rehired to a second job within three years than their white counterparts, and that a head coach's race affects the quality of the opportunities he is offered. These findings are stronger for first-time coaches than experienced coaches, suggesting that observable information on performance mitigates bias. (JEL J0, J4, J7)     

ENTERTAINING MALTHUS: BREAD,CIRCUSES, AND ECONOMIC GROWTH

Motivated by the basic adage that man does not live by bread alone, we offer a theory of historical economic growth and population dynamics where human beings need food to survive, but enjoy other things, too. Our model imposes a Malthusian constraint on food, but introduces a second good to the analysis that affects living standards without affecting population growth. We show that technological change does a good job explaining historical consumption patterns and population dynamics, including the Neolithic Revolution, the Industrial Revolution, and the Great Divergence. Our theory stands in contrast to models that assume a single composite good and a Malthusian constraint. These models generate negligible growth prior to the Industrial Revolution. However, recent revisions to historical data show that historical living standards—though obviously much lower than today's—varied over time and space much more than previously thought. These revisions include updates to Maddison's dataset, which served as the basis for many papers taking long‐run stagnation as a point of departure. This new evidence suggests that the assumption of long‐run stagnation is problematic. Our model shows that when we give theoretical accounting of these new observations the Industrial Revolution is much less puzzling. (JEL B10, I31, J1, N1, O30)     

Core self-evaluations mediate the association between leaders' facial appearance and their professional success: Adults' and children's perceptions

Although the link between facial appearance and success is well established, the mechanisms responsible for this association have remained elusive. Evolutionary theory suggests that perceived leadership characteristics should be important for men's self-concept. Drawing on implicit leadership theory and evolutionary perspectives, we therefore examined the associations between first impressions based on facial appearance, core self-evaluations (CSEs), leadership role occupancy, and career success among a sample of working men. In Study 1, we found that CSEs mediated the relationship between individuals' facial appearance and measures of their success as leaders. In Study 2, we replicated these results using children's ratings of facial appearance, thus suggesting that basic properties of the targets' faces communicated their leadership ability more than the perceivers' life experience or acquired knowledge. These results suggest that people may use facial appearance as a diagnostic tool to determine the leadership ability of others.     

Interviewing children versus tossing coins: accurately assessing the diagnosticity of children's disclosures of abuse

We describe a Bayesian approach to evaluating children's abuse disclosures and review research demonstrating that children's disclosure of genital touch can be highly probative of sexual abuse, with the probative value depending on disclosure spontaneity and children's age. We discuss how some commentators understate the probative value of children's disclosures by: confusing the probability of abuse given disclosure with the probability of disclosure given abuse, assuming that children formally questioned about sexual abuse have a low prior probability of sexual abuse, misstating the probative value of abuse disclosure, and confusing the distinction between disclosure and nondisclosure with the distinction between true and false disclosures. We review interviewing methods that increase the probative value of disclosures, including interview instructions, narrative practice, noncontingent reinforcement, and questions about perpetrator/caregiver statements and children's reactions to the alleged abuse.     

Vowel harmony redux: Correct sounds,English loan words,and the sociocultural life of a phonological structure in Korean1

This paper examines an ideology of standard pronunciation and spelling of English loan words in South Korea through the lens of Korean vowel harmony. I focus specifically on the alternation between an older Japanese‐style ‘a’[a] and a newer Korean‐style ‘?’[?] for the mapping of mid‐vowels from English to Korean. The opposition between ‘a’ and ‘?’ also figures into the dichotomy of vowel classes between ‘yang’ or ‘light’ vowels and ‘yin’ or ‘dark’ vowels in Korean vowel harmony. This opposition is pervasive in Korean's rich stock of denotationally iconic words (e.g. onomatopoeia), where ablaut between vowel classes produces semantic and pragmatic contrasts. I suggest that this latter structure of phonological opposition has an influence on speakers’ perceptions of vowel difference and associated values in English loan words, despite an overarching ideology of standard pronunciation that is based on assumptions about phonetic fidelity. ? ??? ?? ???? ?? ?? ? ??? ? ?????? ????? ?? ??? ???? ????. ??, ?? ???? ‘?’[a]? ‘?’[?]? ??(mapping)?? ?? ??? ??. ??? ?? ????? ‘?’? ?? ?? ??? ? ?????? ???? ???? ??(正音)?? ?????? ??. ?? ‘?’? ????? ???, ??? ???? ??? ????? ?(音)?? ???? ??. ???, ‘?’/‘?’? ??? ??? ???? ?? ????? ????? ??; ?, ??? ????? ????? ??? ??. ??, ????? ???? ????? ??? ??? ??? ? ? ??. ????, ????? ????? ????? ??? ?? ???? ????? ??? ??? ???. [Korean]