Imperatives: a Judgemental Analysis

This paper proposes a framework for formalising intuitions about the behaviour of imperative commands. It seeks to capture notions of satisfaction and coherence. Rules are proposed to express key aspects of the general logical behaviour of imperative constructions. A key objective is for the framework to allow patterns of behaviour to be described while avoiding making any commitments about how commands, and their satisfaction criteria, are to be interpreted. We consider the status of some conundrums of imperative logic in the context of this proposal.     

Bohrification of operator algebras and quantum logic

Following Birkhoff and von Neumann, quantum logic has traditionally been based on the lattice of closed linear subspaces of some Hilbert space, or, more generally, on the lattice of projections in a von Neumann algebra A. Unfortunately, the logical interpretation of these lattices is impaired by their nondistributivity and by various other problems. We show that a possible resolution of these difficulties, suggested by the ideas of Bohr, emerges if instead of single projections one considers elementary propositions to be families of projections indexed by a partially ordered set ${\mathcal{C}(A)}$ of appropriate commutative subalgebras of A. In fact, to achieve both maximal generality and ease of use within topos theory, we assume that A is a so-called Rickart C*-algebra and that ${\mathcal{C}(A)}$ consists of all unital commutative Rickart C*-subalgebras of A. Such families of projections form a Heyting algebra in a natural way, so that the associated propositional logic is intuitionistic: distributivity is recovered at the expense of the law of the excluded middle. Subsequently, generalizing an earlier computation for n × n matrices, we prove that the Heyting algebra thus associated to A arises as a basis for the internal Gelfand spectrum (in the sense of Banaschewski?CMulvey) of the ??Bohrification?? ${\underline A}$ of A, which is a commutative Rickart C*-algebra in the topos of functors from ${\mathcal{C}A}$ to the category of sets. We explain the relationship of this construction to partial Boolean algebras and Bruns?CLakser completions. Finally, we establish a connection between probability measures on the lattice of projections on a Hilbert space H and probability valuations on the internal Gelfand spectrum of ${\underline A}$ for A?=?B(H).     

Differential effects of intergroup contact for authoritarians and social dominators: a dual process model perspective

Intergroup contact is among the most effective ways to improve intergroup attitudes. Research examining whether the effects of contact are contingent on individual differences is limited, however. The authors test a dual process model perspective of individual differences in contact and prejudice. Their model predicts that intergroup contact should be particularly effective for people high in right-wing authoritarianism, but not those high in social dominance orientation, because these ideological attitudes are driven by different underlying motivational goals. The authors confirm these hypotheses in longitudinal (N = 805) and cross-sectional (N = 1,343) national probability samples. They also isolate perceived social threat, but not competitive threat, as a mediator for the interaction of right-wing authoritarianism and contact on prejudice. The authors elaborate on the individual difference mechanisms that facilitate and inhibit the effects of intergroup contact on prejudice and discuss how these relations may depend on contextual factors and the varying functions of prejudice.     

Big-Five personality prospectively predicts Social Dominance Orientation and Right-Wing Authoritarianism

A full cross-lagged panel design examined the bidirectional effects of the Big-Five personality dimensions on Social Dominance Orientation (SDO) and Right-Wing Authoritarianism (RWA) over 9 months (N = 190 undergraduates). Consistent with the Dual Process Cognitive-Motivational Model, SDO and RWA exhibited markedly different personality bases. Low Agreeableness predicted change in the motivational goal for group-based dominance and superiority (SDO), whereas Openness to Experience predicted change in the motivational goal for social cohesion and collective security (RWA). Extending previous longitudinal research, this study indicates that the effect of personality on ideology is unidirectional, as RWA and SDO did not predict reciprocal prospective change in broad-bandwidth personality. These findings are consistent with a model in which relatively stable broad-bandwidth personality traits shape ideological attitudes over even relatively short time periods, and not the reverse.     

How does celebrity meaning transfer? Investigating the process of meaning transfer with celebrity affiliates and mature brands

The influence of celebrity spokespersons has largely been examined using source models from the communication literature that feature explicit persuasive messages. Alternatively, theorizing by McCracken (1989) offers a more comprehensive explanation based on meaning transfer. Our research elaborates McCracken's model by investigating a cognitive process underlying meaning transfer. Evaluative conditioning procedures are used as the tool to expose this process. To assess celebrity influence as it may operate in the marketplace, well-known brands and well-known celebrities are featured. The results support, at the individual level, McCracken's theoretical axiom concerning meaning transfer from celebrity affiliate to brand.     

The structure of short-term memory scanning: an investigation using response time distribution models

A classic question in cognitive psychology concerns the nature of memory search in short-term recognition. Despite its long history of investigation, however, there is still no consensus on whether memory search takes place serially or in parallel or is based on global access. In the present investigation, we formalize a variety of models designed to account for detailed response time distribution data in the classic Sternberg (Science 153: 652-654, 1966) memory-scanning task. The models vary in their mental architectures (serial exhaustive, parallel self-terminating, and global access). Furthermore, the component processes within the architectures that make match/mismatch decisions are formalized as linear ballistic accumulators (LBAs). In fast presentation rate conditions, the parallel and global access models provide far better accounts of the data than does the serial model. LBA drift rates are found to depend almost solely on the lag between study items and test probes, whereas response thresholds change with memory set size. Under slow presentation rate conditions, even simple versions of the serial-exhaustive model provide accounts of the data that are as good as those of the parallel and global access models. We provide alternative interpretations of the results in our General Discussion.     

Impaired associative taste learning and abnormal brain activation in kinase-defective eEF2K mice

Memory consolidation is defined temporally based on pharmacological interventions such as inhibitors of mRNA translation (molecular consolidation) or post-acquisition deactivation of specific brain regions (systems level consolidation). However, the relationship between molecular and systems consolidation are poorly understood. Molecular consolidation mechanisms involved in translation initiation and elongation have previously been studied in the cortex using taste-learning paradigms. For example, the levels of phosphorylation of eukaryotic elongation factor 2 (eEF2) were found to be correlated with taste learning in the gustatory cortex (GC), minutes following learning. In order to isolate the role of the eEF2 phosphorylation state at Thr-56 in both molecular and system consolidation, we analyzed cortical-dependent taste learning in eEF2K (the only known kinase for eEF2) ki mice, which exhibit reduced levels of eEF2 phosphorylation but normal levels of eEF2 and eEF2K. These mice exhibit clear attenuation of cortical-dependent associative, but not of incidental, taste learning. In order to gain a better understanding of the underlying mechanisms, we compared brain activity as measured by MEMRI (manganese-enhanced magnetic resonance imaging) between eEF2K ki mice and WT mice during conditioned taste aversion (CTA) learning and observed clear differences between the two but saw no differences under basal conditions. Our results demonstrate that adequate levels of phosphorylation of eEF2 are essential for cortical-dependent associative learning and suggest that malfunction of memory processing at the systems level underlies this associative memory impairment.     

Semantic encoding enhances the pictorial superiority effect in the oldest-old

ABSTRACT We examined the effect of a semantic orienting task during encoding on free recall and recognition of simple line drawings and matching words in middle-aged (44-59 years), older (60-89 years), and oldest-old (90+ years) adults. Participants studied line drawings and matching words presented in blocked order. Half of the participants were given a semantic orienting task and the other half received standard intentional learning instructions. Results confirmed that the pictorial superiority effect was greater in magnitude following semantic encoding compared to the control condition. Analyses of clustering in free recall revealed that oldest-old adults' encoding and retrieval strategies were generally similar to the two younger groups. Self-reported strategy use was less frequent among the oldest-old adults. These data strongly suggest that semantic elaboration is an effective compensatory mechanism underlying preserved episodic memory performance that persists well into the ninth decade of life.     

A discourse analysis of power in relation to PSYCHLOPS (Psychological outcome profiles) in the context of CBT for psychosis

Aims: Outcome measures (OMs) and routine change measurement have developed dramatically in psychological therapies over the last two decades and some therapists have expressed concerns that this, depending on how it is handled by the parties involved, can markedly affect the therapy. However, little research has investigated this. It therefore seemed timely to explore discourses of OMs drawn upon by both parties in the therapy room. Method: PSYCHLOPS (Psychological Outcome Profiles) is a client‐centred measure which offered an opportunity to explore how therapists and clients receiving CBT for psychosis talked about OMs. A useful contrast was provided by the CORE‐OM (Clinical Outcomes in Routine Evaluation‐Outcome Measure). The discourses drawn upon by clients (n=4) and therapists (n=4) were analysed, informed by a Foucaultian framework. Results: OMs were constructed as empowering or disempowering of clients, as being able to do therapeutic work of engagement and containment, and as part of the apparatus of service power, positioning therapists as relatively powerless to question their use. Discussion: It is suggested that client‐centred measures like PSYCHLOPS, although partly aligned with a recovery framework, may become part of top‐down state and service power, and there is a need for more research into the different ways in which OMs are used in therapy and the impacts on therapists, clients and their relationships.