Differences in the effect of Pavlovian contingencies upon behavioral momentum using auditory versus visual stimuli.

We examined the role of Pavlovian and operant relations in behavioral momentum by arranging response-contingent alternative reinforcement in one component of a three-component multiple concurrent schedule with rats. This permitted the simultaneous arranging of different response-reinforcer (operant) and stimulus-reinforcer (Pavlovian) contingencies during three baseline conditions. Auditory or visual stimuli were used as discriminative stimuli within the multiple concurrent schedules. Resistance to change of a target response was assessed during a single session of extinction following each baseline condition. The rate of the target response during baseline varied inversely with the rate of response-contingent reinforcement derived from a concurrent source, regardless of whether the discriminative stimuli were auditory or visual. Resistance to change of the target response, however, did depend on the discriminative-stimulus modality. Resistance to change in the presence of visual stimuli was a positive function of the Pavlovian contingencies, whereas resistance to change was unrelated to either the operant or Pavlovian contingencies when the discriminative stimuli were auditory. Stimulus salience may be a factor in determining the differences in resistance to change across sensory modalities.     

Language and reasoning: a study of temporal factors

The paper is concerned with the testing of psycholinguistic hypotheses by the use of deductive reasoning tasks. After reviewing some of the problems of interpretation which have arisen with particular reference to conditional rules, an experiment is presented which measures comprehension and verification latencies in addition to response frequencies in a truth table evaluation task.The experiment tests a psycholinguistic hypothesis concerning the different usage of the logically equivalent forms of sentence: If p then q and p only if q with respect to the temporal order of the events p and q. It is proposed that the former sentence is more natural when the event p precedes the event q in time, and the latter more natural when the opposite temporal relation holds.Although significant support is found for the hypothesis in the analysis of the latency data, it is only distinguished from an alternative explanation by detailed analysis of response frequencies, thus indicating the general usefulness of the paradigm adopted.     

Relationships between self-concept and achievement

This study is based on a multifaceted and hierarchical model of self-concept and explores the relationships between the various facets of self-concept and academic achievement. The model of self-concept has general self-concept at the apex, then academic self-concept, presentation of self, and social self-concept. There are 7 third-order factors: achievement, ability, and classroom self-concepts (academic), physical self-concepts (social). Further, there are four specific-subject and peer and family self-concepts (social). Further, there are four specific-subject self-concepts. The argument proposed in this study is that the relations between achievement and the facets of academic self-concept are greater than the relations between achievement and presentation of self and social self-concept. This argument is not rejected. Adolescents consistently evaluate themselves across various academic subjects, but there are no relationships between achievement and other aspects of the self.     

The impact of a dedicated lane for connected and automated vehicles on the behaviour of drivers of manual vehicles

Connected and automated vehicles (CAVs) are expected to enhance traffic efficiency by driving at shorter time headways, and traffic safety by shorter reaction times. However, one of the main concerns regarding their deployment is the mixed traffic situation, in which CAVs and manually driven vehicles (MVs) share the same road.This study investigates the behavioural adaptation of MV drivers in car-following and lane changing behaviour when they drive next to a dedicated lane (DL) for CAVs and compares that to a mixed traffic situation. The expectation is that in a mixed traffic situation, the behavioural adaptation of MV drivers is negligible due to lower exposure time and scarce platoons, while concentrating the CAVs on one dedicated lane may cause significant behavioural adaptation of MV drivers due to a higher exposure time and conspicuity of CAV platoons.Fifty-one participants were asked to drive an MV on a 3-lane motorway in three different traffic scenarios, in a fixed-base driving simulator: (1) Base, only MVs were present in traffic, (2) Mixed, platoons of 2–3 CAVs driving on any lane and mixed with MVs, (3) DL, platoons of 2–3 CAVs driving only on a DL. The DL was recognizable by road signs and a buffer demarcation which separated the DL from the other lanes. A moderate penetration rate of 43% was assumed for CAVs.During the drives, the car following headways and the accepted merging gaps by participants were collected and used for comparisons of driving behaviour in different scenarios.Based on the results, we conclude that there is no significant difference in the driving behaviour between Base and Mixed scenarios at tested penetration rate, confirming our research expectation. However, in DL scenario, MV drivers drove closer to their leaders specially when driving on the middle lane next to the platoons and accepted shorter gaps (up to 12.7% shorter at on-ramps) in lane changing manoeuvres. Dedicating a lane to CAVs increases the density of CAV platoons on one lane and consequently their conspicuity becomes higher. As a result, MV drivers are influenced by CAV platoons on a DL and imitate their behaviour.The literature suggests that dedicating a lane to CAVs improves the traffic efficiency by providing more possibilities for platooning. This study shows that implementing such a solution will affect the driving behaviour of human drivers. This should be taken into consideration when evaluating the impacts of dedicated lanes on traffic efficiency and traffic safety.     

Delivering alternative reinforcement in a distinct context reduces its counter‐therapeutic effects on relapse

Delivery of alternative reinforcers in the presence of stimuli previously associated with reinforcement for target behavior increases the susceptibility of target behavior to relapse. To explore contingencies that might mitigate this counter‐therapeutic effect, we trained pigeons on a procedure that entailed extinction of previously reinforced target‐key pecking, access to a distinct stimulus context contingently on refraining from target behavior (differential‐reinforcement‐of‐other‐behavior; DRO), and reinforcement of alternative‐key pecks (differential‐reinforcement of alternative behavior; DRA) in that context. This DRO‐DRA treatment was compared with standard DRA in successive conditions, counterbalanced across pigeons. Target behavior extinguished more rapidly in the Standard‐DRA condition. When alternative reinforcement was discontinued, however, there was less resurgence after DRO‐DRA than after Standard DRA. In a third condition, the DRO contingency was suspended so that the former DRA stimuli were not presented (DRO‐NAC), and resurgence was greater than in the Standard‐DRA and DRO‐DRA conditions. Reinstatement produced by response‐independent reinforcers was small and similar across conditions. Subsequent reacquisition of target‐key pecking under baseline reinforcement conditions was faster following DRO‐NAC than Standard‐DRA or DRO‐DRA. These findings suggest that DRO‐DRA might serve as a useful method in clinical settings for reducing problem behavior while minimizing the threat of posttreatment relapse.     

What Sort of Ethics Does Technology Require?

This essay critically examines thenon-essentialist and anti-deterministicphilosophy of technology developed in the workof Andrew Feenberg. As I interpret the work,Feenberg achieves an important``demystification' of technology. His analysispeels away the facade of ironclad efficiency,rationality, and necessity that permeates ourexperience of technology. Through theoreticalargument and rich examples, he illuminated thecontingent interests, values, meanings, andvoices that are built into specifictechnologies, often by experts. He shows howtechnology is transformed by lay actors whochallenge its design on behalf of a wideragenda of interests, values, meanings andvoices. My critique focuses on Feenberg'sattempt to argue from his demystification oftechnology to the full democratization of alltechnical design and decision-making. I arguethat Feenberg's framework lacks the ethicalresources required both to (1) justify thedemocratization of technical decisions, andmore basically, (2) to determine when laychallenges to technology do and when theydon't, advance democratic ideals, and why. Itrace these problems to ethical inadequacies inhis notions of interests, democratization, andan alternative modernity. A sub-theme of myargument is that our society's Lockeanmorality of property rights and market freedomsposes fundamental ethical objections to hisphilosophy of technology with which it isill-equipped to deal.     

Reduced approach motivation following nonreward: Extension of the BIS/BAS scales

The current study describes the development and validation of a new subscale to be used with the BIS/BAS scales (Carver & White, 1994). This subscale measures lowered approach motivation following nonreward. Factor analysis of the new subscale was carried out within a sample of 308 University students, test–retest reliability was established within a sample of 62 individuals, and construct validity was explored in a sample of 86 individuals by comparing scores on the new subscale with those on an existing self-report measure of apathy and on a behavioural measure of persistence. Reliability and validity of the new frustrative nonreward responsiveness subscale was found to be adequate within the populations studied. The findings are discussed in relation to theoretical accounts of BAS and BIS sensitivity.     

Regulatory fit from attribute‐based versus alternative‐based processing in decision making

This paper discusses the fit between attribute-based versus alternative-based processing and regulatory focus, and its impact on decision outcome valuation. Attribute-based processing was found to occur more frequently under prevention focus, whereas alternative-based processing occurred more frequently under promotion focus. The fit between prevention/promotion focus and attribute-based/alternative-based processing was found to enhance satisfaction with choices and the perceived monetary value of chosen options. Moreover, the effect of fit on outcome valuation was found to be mediated by ease of processing. Finally, the effects of fit on ease of processing and outcome valuation disappeared when consumers first practiced to process information based on either attributes or alternatives.     

Quackademia? Mass-Media Delegitimation of Homeopathy Education

In response to concerns about the standards of training for non-medically qualified homeopathic practitioners, between 1999 and 2009 a number of UK universities taught Bachelor of Science (BSc) degrees in homeopathy. All the courses were subsequently closed following media coverage of a vigorous campaign from scientists against the degree courses. A boundary-work analysis of 65 articles published in the UK print media reveals the use of metaphors from a number of different fields as rhetorical strategies to malign homeopathy education. As well as the commonly used contrasts of profit versus academic integrity, rationality versus faith and logic versus magic, media reports associated homeopathy with new universities and Mickey Mouse degrees, both of which had been denigrated in the press previously. In the press coverage, much attention was also drawn to the fact that the method of repeatedly diluting homeopathic medicines defies both logic and common sense, and the plausibility argument became a decisive blow in the debate over the legitimacy of teaching homeopathy as a science degree. It seems that the boundary work sought to protect the authority of both science and medicine by expelling homeopathy from higher education. These findings contrast with previous studies that suggest that orthodox medicine has occasionally expanded to incorporate desirable aspects of complementary and alternative therapies. Scientists carry out boundary work not just to demarcate the boundaries of science and directly defend their own interests, but also to protect the authority of other allied professions.     

Childhood vaccine refusal and hesitancy intentions in Croatia: insights from a population-based study

Considering that programmatic data suggest a recent rise in vaccine refusal in Croatia, this study, first of its kind in Southeast Europe, aimed to estimate the prevalence, and sociodemographic, and sociocultural determinants of childhood vaccine refusal and hesitancy (CVRH) intentions among Croatian adults. Multi-stage stratified population-based survey included 1000 individuals aged 18–88 years (M_age = 47.7, SD = 17.8), of whom 51.7% were women. The outcome, a categorical indicator, distinguished among individuals who would approve vaccinating their children (vaccine accepting), those who would approve some but not all vaccines (vaccine hesitant), and those who would refuse vaccination (vaccine refusing). A sizeable minority of participants was characterized by childhood vaccine refusal (10.6%) and hesitancy intentions (19.5%). In a multivariate assessment controlling for parenthood, the odds of vaccine hesitancy were significantly increased by a younger age (AOR = 1.96–3.03, p < .01). Religiosity (AOR = 1.12, p < .05) and the use of alternative medicine (AOR = 2.85, p < .001) increased the odds of vaccine refusal. However, individual characteristics seem to be relatively poor predictors of CVRH intentions in Croatia. Following the social contagion model, future research should move beyond individual-level approach and take into account social interaction and social network effects.