A validation of the Worker Trait Groups in the DOT

An empirical validation of the 114 Worker Trait Groups (WTG) of the Third Edition of the Dictionary of Occupational Titles (DOT) was performed by comparing the factor structure of the worker trait components of the 114 WTG's with the factor structure of a random sample of 800 of the 4000 jobs used as the basis for the DOT, Third Edition. Six factors were compared and cosines between .8997 and .9657 obtained on the matched factors, thus providing a measure of empirical validity for the 114 WTG's based on the worker trait components.     

Relations Between Instructional Practices and On-Task Behavior in Classrooms Serving American Indian Students

Achievement disparities between American Indian students and non-American Indian peers are persistent and well documented. Student engagement is a promising target for intervention given its relation to academic achievement. This study investigated the relation between specific teacher practices (opportunities to respond [OTRs], praise, and reprimands) and classroom on-task behavior in an urban, public K–8 school that serves primarily American Indian students. OTRs and praise were positively associated with student on-task behavior, whereas reprimands were negatively associated with on-task behavior. Results from multilevel logistic regression indicated that OTRs significantly increased the likelihood that a classroom was highly on-task, whereas the reprimands significantly decreased the likelihood. Praise did not have a significant effect after controlling for the other variables in the model. Results are interpreted in a context of evidence-based instructional practices for increasing OTRs and praise, decreasing reprimands, and ultimately enhancing on-task behavior in an urban classrooms serving primarily American Indian youth.     

The effects of context extinction on US signal value

Two experiments with rats examined the effects of context extinction on responding to the signal value of an unconditioned stimulus (US). In Experiment 1, US signal value was first trained when a single food pellet signaled the delivery of three additional pellets. After training, rats received either context extinction (CE) or home cage (HC) exposure before testing US signal value by single food pellet presentations. Results showed responding was significantly reduced in Group CE compared to Group HC. Experiment 2 replicated Experiment 1 and showed that exposure to a different context did not reduce responding to the signal value of a US. The results complement research by Kehoe et al. [Kehoe, E. J., Weidemann, G., & Dartnall, S. (2004). Apparatus exposure produces profound declines in conditioned nictitating-membrane responses to discrete conditioned stimuli by the rabbit (Oryctolagus cuniculus). Journal of Experimental Psychology: Animal Behavior Processes, 30, 259–270.] and have key implications for prominent theories of conditioning.     

Of pharisees and snark‐hunters: Afro‐Cuban religion as an object of knowledge

Examining some recent publications on Afro‐Cuban religions in the US, this essay argues that some of the evident shortcomings of the literature on this subject may hold important epistemological and methodological lessons for the anthropology of religion in general. These concern the pervasive lack of critical attention to the criteria by which formations of religious knowledge and practice are constituted as objects of study; a failure to acknowledge the historical interaction between theoretical models and public demand structures for authenticated cultural difference; the tendency to treat the relation between observer‐ and insider‐discourses as unproblematic and transparent; and a similarly widespread trend towards over‐systematising and homogenising internally heterogeneous and unbounded aggregates of knowledge and practice. What is suggested instead is an ethnographically informed and actor‐centred sociology of knowledge focussed on mutually articulated universes of meaning, and capable of transcending artificial conceptual boundaries between ‘the religious’ and the sphere of ‘everyday life’.     

Rats’ memory for time and relational responding in the duration-comparison procedure

Rats were trained in a duration-comparison task to press one lever if the comparison duration (c) was 1.2-s shorter than a standard duration (s), and another lever if c was 1.2-s longer than s. The interval between s and c duration was 1 s. The 10 duration pairs used during training controlled for the absolute duration of c and the total duration of an s-c pair. The total duration of an s-c pair was not predictive of the correct response. In Experiment 1, during equal-duration pair test trials, rats increasingly responded long (i.e., c > s) as the s-c delay was lengthened. In Experiment 2, long responding increased as the s-c delay was lengthened, even when the illumination condition during the s-c delay differed from that during the intertrial interval (ITI). In Experiment 3, transfer to novel duration pairs was assessed. Overall accuracy for the novel duration pairs was significantly above chance, but transfer performance was also affected by the absolute value of the novel c durations. This is the first study to demonstrate that rats can acquire relational duration discriminations. As in previous studies with pigeons the evidence was consistent with subjective-shortening of the standard duration and there was also evidence of a reliance on a mixture of absolute and relational strategies in responding.     

Cue competition between elementary trained stimuli: US miscuing, interference, and US omission

The present series of experiments was designed to assess whether rule-based accounts of Pavlovian learning can account for cue competition effects observed after elemental training. All experiments involved initial differential conditioning training with A-US and B alone presentations. Miscuing refers to the fact that responding to A is impaired after one B-US presentation whereas interference is the impairment of responding to A after presentation of C-US pairings. Omission refers to the effects on B of A alone presentations. Experiments 1-2a provided clear evidence for miscuing whereas interference was not found after 1, 5 or 10 C-US pairings. Moreover, Experiments 3 and 3a found only weak evidence for interference in an A-US, B ∣ C-US, D ∣ A design used previously to show the effect. Experiments 4 and 5 failed to find any effect of US omission after one or five omission trials. The present results indicate that miscuing is more robust than is the interference effect. Moreover, the asymmetrical effects of US miscuing and US omission are difficult to accommodate within rule-based accounts of Pavlovian conditioning.     

Thwarting the renewal (relapse) of conditioned fear with the explicitly unpaired procedure: Possible interpretations and implications for treating human fears and phobias

In three experiments using the barpress conditioned suppression task with albino rats, we studied the renewal (relapse) of conditioned fear in an ABA fear-renewal paradigm. We found that explicitly unpaired (EU) deliveries of conditioned stimuli (CSs) and unconditioned stimuli (USs) in Context B thwarted fear renewal in Context A. Evidence contraindicated a suggestion by Rauhut, Thomas, and Ayres (2001) that US habituation plays a key role in this effect. For example, renewal was thwarted only when EU CSs and USs were intermingled rather than given in succession. The possibility that EU treatments thwart renewal by creating a CS that inhibits fear in the test context also received no support. Thus, summation and retardation tests in Context A found no evidence that the EU CS became inhibitory, finding instead evidence for a residual excitation. Other possible interpretations of the results and some implications for clinical practice are noted.     

Using Cases with Contrary Facts to Illustrate and Facilitate Ethical Analysis

There has been increasing interest in developing practical, non-theoretical tools for analyzing ethical problems in public health, biomedicine, and other scientific disciplines so that professionals can make and justify ethical decisions in their own research or practice. Tools for ethical decisionmaking, together with case studies on ethics, are often used in graduate education programs and in continuing professional education. Students can benefit from opportunities to further develop their analytical skills, to recognize ethical issues, and to develop their moral sensitivity. One practical approach for illustrating and facilitating ethical analysis uses cases with contrary facts and circumstances, an approach which complements rather than replaces theoretical approaches to moral reasoning. Cases with contrary facts and circumstances are presented in two or more alternative ways so that the facts, circumstances, or framing of one version runs counter to that of the other version (s). Cases with contrary facts, together with practical steps for identifying and analyzing ethical issues, are likely to be useful tools for illustrating and facilitating ethics analysis and stimulating the moral imagination. The findings and conclusions in this article are those of the author and do not necessarily represent the views of the Centers for Disease Control and Prevention.     

The Effects of Domain Knowledge and Instructional Manipulation on Creative Idea Generation

The experiment was designed to explore the effects of domain knowledge, instructional manipulation, and the interaction between them on creative idea generation. Three groups of participants who respectively possessed the domain knowledge of biology, sports, or neither were asked to finish two tasks: imagining an extraterrestrial animal and creating a new sport. Participants in each group were randomly assigned to one of three instructions, in order to encourage them to perform the tasks using a specific instance strategy (relying on specific instances), an abstract strategy (relying on abstract principles), or their habitual ways. Based on an analysis of the participants' verbal reports and their creations, the results suggested that domain knowledge enhanced the tendency to use the abstract strategy, and improved the originality and practicality of the generated ideas. Instructions also influenced the strategy participants used in creative idea generation. The instruction to use abstract principles brought forth the most original creations. Moreover, there was an interaction between domain knowledge and instructions. Encouraging participants to use the specific instance strategy blocked the knowledgeable people from developing novel ideas. Other factors, such as age, grade and gender, were found to be unrelated to either the originality or the practicality of the creations. The implications of the results were discussed in detail.