Perceptual outcomes as reinforcers

The paucity of basic behavioral research with humans was highlighted almost 40 years ago (Findley, 1966). A recent search of the basic behavioral research journals by the present authors indicated that this situation remains, with only approximately 15% of the research using human participants. It may seem surprising that so few studies use human participants given the apparent practical advantages of doing so. Human participants are readily available, extensively pre-trained, can use a range of complex apparatus and require no feeding or housing. In reality, however, the use of human participants involves a number of practical difficulties: humans generally will not agree to participate in research involving a large number of sessions or sessions lasting more than two to three hours; it is difficult to gain within-session compliance as a result of the often repetitive and simplistic nature of the tasks; and it is often unclear whether the experimental results are a product of the experimentally-arranged contingencies or the instructions given to the participants. Another difficulty, that which is addressed here, lies in the identification of a suitable experimental outcome that will serve as a reinforcer

New Zealand culture of intoxication: Local and global influences

This article shows that attitudes towards and behaviours involving the consumption of alcohol in New Zealand have long been problematic. It provides an historical account of social, economic and legislative factors which have influenced the development of the New Zealand drinking culture. Accordingly, it tracks a combination of local and global alcohol-related influences and documents the interrelationships amongst these factors. In particular, it proposes that the liberalisation of alcohol licensing laws and advertising/sponsorship regulations, alongside the growth of the alcohol-based hospitality industry have promoted the normalisation of an alcohol-based leisure lifestyle. Against this backdrop, the growth of consumer culture , tertiary student culture and the New Zealand drug culture, along with the development of new alcohol products and the establishment of commercial and social-networking websites have conjointly enabled the growth of a culture of intoxication, which is characterised by drinkers intentionally drinking to intoxication and viewing this behaviour as socially acceptable

Precision teaching and fluency: the effects of charting and goal-setting on skaters’ performance

This research involved three successive studies where precision teaching methods were used to increase roller skaters performance rates of basic skating skills. The first study compared precision teaching methods both with and without the use of charting in a group design, and compared both within-subject and betweensubject differences for 12 skaters. Results showed that charting did not increase performance rates over that seen when charting was not used. The second study was a group design which compared two different types of goals, or performance aims, on skaters‟ performance. No difference was found between the two groups of 5 skaters when one group used a fixed, difficult goal and a second used a flexible, easier goal. In the final study, a single-subject design was used and 8 skaters completed a control condition where no goals were set before a goal was introduced for 4 skaters. It was found that an immediate increase in performance rates occurred following the introduction of the goal. Overall these three studies showed that skaters improved their performance rates over sessions, even in the absence of charting and/or goals, demonstrating that precision teaching can be applied to the sport of roller skating

Extinction-induced variability in human behavior

Participants earned points by pressing a computer space bar (Experiment 1) or forming rectangles on the screen with the mouse (Experiment 2) under differential-reinforcement-of-low-rate schedules, followed by extinction. Variability in interresponse time (the contingent dimension) increased during extinction, as for Morgan and Lee (1996); variability in diagonal length (the noncontingent dimension, Experiment 2) did not. In Experiment 3, points were contingent on rectangle size. Rectangle size and interresponse-time (the noncontingent dimension) variability increased in extinction. There was greater variability in the contingent dimension during extinction for participants with the more varied history of reinforcement in Experiment 2 but not in Experiment 3. Overall, variability in the contingent dimension increased in extinction, but the degree of increase was affected by reinforcement history

Student Culture and Binge Drinking

New Zealand student culture has had a strong tradition of alcohol use. Research, both in New Zealand and internationally, has identified halls of residence student drinkers as at more risk of alcohol-related harm than their same age non-resident and non-student peers. This research project investigates the relationship between student culture and binge drinking behaviour within the University of Waikato's halls of residence student population. It combines qualitative and quantitative methods encompassing focus groups, individual face-to-face interviews, and a survey questionnaire completed by sixty percent of the resident student population. The resulting data are set within the context of existing literature on student drinking behaviour and student culture, and the analysis is undertaken using a combination of grounded theory and statistical analysis. The study reveals that binge drinking behaviour was viewed by the majority of residents as a normal component of student culture, with one-half of male residents who drink and one-third of female drinking residents becoming intoxicated on a weekly basis. Contrary to the popular perception that student drinking behaviour is an uncontrolled activity however, the majority of residents' practised 'controlled intoxication' while drinking. Overall, most residents enjoyed their drinking experiences and showed a high level of tolerance towards many alcohol-related harms. There is clear evidence that resident drinking behaviour impacts adversely upon residents, with one-half of residents having experienced academic and/or physical harms, and twenty percent reporting sexual encounters they later regretted. One-third of residents had also felt unsafe due to the drinking behaviour of others. Adopting the precepts of a social-ecological approach, this thesis argues that a range of multi-level harm-minimisation strategies targeting resident drinking behaviour are required, in conjunction with renewed efforts to effect change in the New Zealand drinking culture. Fifteen alcohol-intervention initiatives are recommended which variously target the individual drinker, the halls of residence environment, the institutional environment, and the local community drinking environment. The national drinking environment is also pursued through recommendations advocating legislative change to make it an offence to be intoxicated in a public place, and through social marketing strategies which encourage peer feedback, the shaming of intoxicated behaviour, and the continued emphasis on the association between drinking and its adverse effects

Pleasure, profit and pain: Alcohol in New Zealand and the contemporary culture of intoxication

This book details the rich, complex and often contested role of alcohol in New Zealand society. It explores the three fundamental alcohol rights that continue to fight for dominance of the national drinking culture: the rights of individual drinkers to enjoy the pleasures of alcohol, the rights of society to protect itself from the harms of alcohol, and the rights of the alcohol industry to profit from the sale of a legal commodity. Historically, most of our intoxicated drinkers were adult males and drinking was typically separated from family, food and entertainment. With the sweeping social changes of the 1960s and 1970s, women and later young people, increasingly engaged with alcohol. A growing proportion of these groups have since joined men in a culture of intoxication, or binge drinking culture as it is often termed. New Zealand is not alone however, in having a culture of intoxication, with similar alcohol consumption patterns evident in many other developed nations. This book identifies the local and the global influences that have affected New Zealand society (and much of the rest of the world) since the late 1900s and details how these influences have sustained the contemporary culture of intoxication. Finally, this book will propose that to implement effective change to our national drinking culture, the rights of the alcohol industry and of individual drinkers will need to be pulled back from the liberal excesses that the 1980s and 1990s provided. A re-balancing is required in order to strengthen and sustain society’s right to protect itself from alcohol-related harm

On the dynamics of tidal streams in the Milky Way galaxy

We present a brief history of Galactic astrophysics, and explain the origin of halo substructure in the Galaxy. We motivate our study of tidal streams by highlighting the tight constraints that analysis of the trajectories of tidal streams can place on the form of the Galactic potential. We address the reconstruction of orbits from observations of tidal streams. We upgrade the scheme reported by Binney (2008) and Jin & Lynden-Bell (2007), which reconstructs orbits from streams using radial-velocity measurements, to allow it to work with erroneous input data. The upgraded algorithm can correct for both statistical error on observations, and systematic error due to streams not delineating individual orbits, and given high-quality but realistic input data, it can diagnose the potential with considerable accuracy. We complement the work of Binney (2008) by deriving a new algorithm, which reconstructs orbits from streams using proper-motion data rather than radial velocities. We show that the new algorithm has a similar potency for diagnosing the Galactic potential. We explore the concept of Galactic parallax, which arises in connection with our proper-motion study. Galactic parallax allows trigonometric distance calculation to stars at 40 times the range of conventional parallax, although its applicability is limited to only those stars in tidal streams. We examine from first principles the mechanics of tidal stream formation and propagation. We find that the mechanics of tidal streams has a natural expression in terms of action-angle variables. We find that tidal streams in realistic galaxy potentials will generally not delineate orbits, and that attempting to constrain the Galactic potential by assuming that they do can lead to large systematic error. We show that we can accurately predict the real-space trajectories of streams, even when they differ significantly from orbits.Comment: Author's DPhil thesis. 174pp, 148 figures. The authoritative copy is lodged with the Bodelian Library, University of Oxfor

Evaluation of a web-based self-compassion intervention to reduce student assessment anxiety.

Assessment anxiety is associated with excessive worry and cognitive disruption which can contribute to academic failure. Compassion-focused interventions have previously been effective in reducing anxiety, stress and depression among the general population. Aims: This study extended this approach to students whose academic achievement is potentially compromised by assessment anxiety, by evaluating a web-based compassionate imagery intervention. Students (n=48) who self-identified as assessment anxious were randomised to practice either compassionate imagery exercises or to a control condition of practicing relaxation exercises. Students completed measures of test anxiety, mastery and performance learning goals, self-compassion, self-criticism/self-reassurance, depression, anxiety and stress, before and after the two-week intervention. The compassionate imagery exercises improved self-compassion more than the control condition of relaxation exercises did. Both tasks improved students’ wellbeing, and reduced assessment anxiety among those with higher baseline assessment anxiety. Web-based compassionate imagery and relaxation may offer cost-effective interventions for reducing assessment anxiety. More research is needed on the influence of self-compassion on learning processes and academic performance and achievement.University of Derby Research for Learning and Teaching Fund (RLTF

Abnormal attentions towards the British Royal Family. Factors associated with approach and escalation

Abnormal approach and escalation from communication to physical intrusion are central concerns in managing risk to prominent people. This study was a retrospective analysis of police files of those who have shown abnormal attentions toward the British Royal Family. Approach (n = 222), compared with communication only (n = 53), was significantly associated with specific factors, most notably serious mental illness and grandiosity. In a sample of those who engaged in abnormal communication (n = 132), those who approached (n = 79) were significantly more likely to evidence mental illness and grandiosity, to use multiple communications, to employ multiple means of communication, and to be driven by motivations that concerned a personal entitlement to the prominent individual. Logistic regression produced a model comprising grandiosity, multiple communications, and multiple means of communication, for which receiver operating characteristic (ROC) analysis gave an area under the curve (AUC) of 0.82. The implications of these findings are discussed in relation to those for other target groups

Copper(II)-bis(thiosemicarbazonato) complexes as anti-chlamydial agents

Lipophilic copper (Cu)-containing complexes have shown promising antibacterial activity against a range of bacterial pathogens. To examine the susceptibility of the intracellular human pathogen Chlamydia trachomatis to copper complexes containing bis(thiosemicarbazone) ligands [Cu(btsc)], we tested the in vitro effect of CuII-diacetyl- and CuII-glyoxal-bis[N(4)-methylthiosemicarbazonato] (Cu(atsm) and Cu(gtsm), respectively) on C. trachomatis. Cu(atsm) and to a greater extent, Cu(gtsm), prevented the formation of infectious chlamydial progeny. Impacts on host cell viability and respiration were also observed in addition to the Chlamydia impacts. This work suggests that copper-based complexes may represent a new lead approach for future development of new therapeutics against chlamydial infections, although host cell impacts need to be fully explored