Search for supersymmetric particles in scenarios with a gravitino LSP and stau NLSP

Sleptons, neutralinos and charginos were searched for in the context of scenarios where the lightest supersymmetric particle is the gravitino. It was assumed that the stau is the next-to-lightest supersymmetric particle. Data collected with the DELPHI detector at a centre-of-mass energy near 189 GeV were analysed combining the methods developed in previous searches at lower energies. No evidence for the production of these supersymmetric particles was found. Hence, limits were derived at 95% confidence level.Comment: 31 pages, 14 figure

Joy leads to overconfidence, and a simple countermeasure

Overconfidence has been identified as a source of suboptimal decision making in many real-life domains, with often far-reaching consequences. This study identifies a mechanism that can cause overconfidence and demonstrates a simple, effective countermeasure in an incentive-compatible experimental study. We observed that joy induced overconfidence if the reason for joy (an unexpected gift) was u

Connecting the dots between brand experience and brand loyalty: The mediating role of brand personality and brand relationships

This article critically examines consumer–brand relationships from the perspective of interpersonal relationship theory. Specifically, the authors investigate the relationship between brand experience and the two components of brand loyalty, namely purchase brand loyalty and attitudinal brand loyalty. The study also examines the link between brand experience and brand relationship variables, brand trust, brand attachment and brand commitment. In addition, the mediating role of brand personality and brand commitment in the relationship between brand experience and brandloyalty is investigated. Drawing on the results of an empirical cross-brand study from three product categories, the authors demonstrate that brand experience, brand personality and brand relationship variables (brand attachment and brand commitment) all affect the degree to which a consumer is loyal to a brand. On the basis of the findings, the authors offer guidelines to managers on how to build and sustain purchase and attitudinal brand loyalty by enhancing brand experience. The theoretical and managerial significance of the findings together with directions for future research are discussed

Study of B0_s anti-B0_s oscillations and B0_s lifetimes using hadronic decays of B0_s mesons

Oscillations of B0s mesons have been studied in samples selected from about 3.5 million hadronic Z decays detected by DELPHI between 1992 and 1995. One analysis uses events in the exclusive decay channels: B0s -> Ds- pi+ or Ds- a1+ and B0s -> anti-D0 K- pi+ or anti-D0 K- a1+, where the D decays are completely reconstructed. In addition, B0s anti-B0s oscillations have been studied in events with an exclusively reconstructed Ds accompanied in the same hemisphere by a high momentum hadron of opposite charge. Combining the two analyses, a limit on the mass difference between the physical B0s states has been obtained: Delta(m_B0s) > 4.0 ps^{-1} at the 95% C.L. with a sensitivity of Delta(m_B0s) = 3.2 ps^{-1}. Using the latter sample of events, the B0s lifetime has been measured and an upper limit on the decay width difference between the two physical B0s states has been obtained: tau(B0s) = 1.53^{+0.16}_{-0.15}(stat.) +/- {0.07}(syst.) ps \Delta\Gamma(B0s)/\Gamma(B0s) < 0.69 at the 95% C.L. The combination of these results with those obtained using Ds+- lepton-+ sample gives: Delta(m_B0s) > 4.9 ps^{-1} at the 95% C.L. with a sensitivity of Delta(m_B0s) = 8.7 ps^{-1}. tau(B0s) = 1.46 +/- 0.11 ps and \Delta\Gamma(B0s)/\Gamma(B0s) < 0.45 at the 95% C.L.Comment: 42 pages, 13 figure

Absence makes the mind grow sharper: Effects of element omission on subsequent recall

The authors investigate the memorial consequences of deliberately omitting crucial elements from an advertisement. Research on the self-generation effect in cognitive psychology indicates that such element omission may actually lead to an improvement in recall. Support for this perspective is obtained in a series of experiments that explores the effects of feature omission in the context of both overt omission (in which the omission is highlighted by the advertiser) and implicit omission (in which the omission, though not highlighted in the advertisement, is noticed because of prior expectations for that ad type). Even under highly constrained processing conditions (e.g., exposure times as short as four seconds), an advertisement that omits a key element is shown to produce better recall than an equivalent advertisement that contains the element. The authors find that this recall improvement occurs along dimensions that are specifically related to the omitted element; therefore, leaving out an element related only to the product category (but not the brand) produces an improvement only in category recall, whereas brand recall is improved by the omission of an element related to the brand name. The authors discuss theoretical and managerial implications of these findings.link_to_subscribed_fulltex

The effects of intrinsic and extrinsic rewards in a risk-taking situation

This study varied both the intrinsic and extrinsic rewards associated with performing a task in a risk taking situation. When the task performed to win a prize provided little if any intrinsic reward, subjects liked and tried for prizes that were easy to obtain. In contrast, when the task was intrinsically rewarding, subjects liked and tried for those prizes that were somewhat more difficult to obtain. In addition, subjects were more likely to like and try for prizes easier to obtain when the extrinsic reward was high. © 1977.link_to_subscribed_fulltex

The impact of embarrassment on condom purchase behaviour

A survey on the impact of embarrassment on condom purchase behavior was conducted among 130 individuals. The survey sample (93 males, 37 females) were recruited at the University of British Columbia. The primary independent variable of interest was the embarrassment of the respondents when purchasing condoms. The background variables were also considered which included the assessments of sexual behavior, gender, age, and residency status. A 4-point scale was used to measure the intensity of embarrassment and a 5-category scale was used to determine the frequency of condom purchase. The results for purchase embarrassment indicate that 41% of females and 34% of males expressed no embarrassment when making a condom purchase. Gender, age, number of sexual partners in the past year, and residency status were not significantly correlated with purchase embarrassment. 62% of males vs. 40% of females purchased at least once every 6 months. In summary, young people feel embarrassed about purchasing condoms, thus affecting their purchase behavior. The people who reported being more embarrassed purchasing condoms did so less often and purchased fewer condoms per visit. Subjects also tended to purchase from vending machines when possible in lieu of from store clerks or pharmacists.link_to_subscribed_fulltex

The impact of free and exaggerated prices on perceived quality of services

Previous research in the price-quality area has largely limited its focus to the normal price range and has concentrated on physical goods almost entirely. This study examines the effect of offering a service for free and at an exaggerated price on the perception of its quality. Consistent with the theory developed in this paper, the experimental results suggest that when the tested services are offered for free and for exaggerated prices, they are perceived as lower in quality than when they are offered in a normal price range. © 1991 Kluwer Academic Publishers.link_to_subscribed_fulltex