Bisimulation for Conditional Modalities

We give a definition of bisimulation for conditional modalities interpreted on selection functions and prove the correspondence between bisimilarity and modal equivalence, generalizing the Hennessy–Milner Theorem to a wide class of conditional operators. We further investigate the operators and semantics to which these results apply. First, we show how to derive a solid notion of bisimulation for conditional belief, behaving as desired both on plausibility models and on evidence models. These novel definitions of bisimulations are exploited in a series of undefinability results. Second, we treat relativized common knowledge, underlining how the same results still hold for a different modality in a different semantics. Third, we show the flexibility of the approach by generalizing it to multi-agent systems, encompassing the case of multi-agent plausibility models.     

The phenomenon of the tip of the tongue in aging

This paper presents new data on the tip of the tongue (TOT) phenomenon and its resolution in aging. 140 volunteers ranging from 19 to 82 years participated in an experiment using definitions about common names, proper names, adjectives and verbs to elicit TOTs. We studied the resolution of the TOTs introducing a free word-recall task and a priming task. Older adults experienced more TOTs than younger adults regardless of the level of vocabulary. Phonological priming, and not free recall of words, improved resolution for the older adults. The results are discussed in relation to the theory of the transmission deficit.     

Factorial and Construct Validity of FACES IV Among Italian Adolescents

The aims of this study were to evaluate the reliability, validity and factorial structure of Family Adaptability and Cohesion Evaluation Scale, Version IV (FACES IV), investigate the relevance of sex and age on family functioning and study the relationship between family functioning and adolescents’ perception of parent and peer attachment. The sample consisted of 1,416 participants (672 women, 744 men, M_age = 17.38 years; age range = 13–22 years) divided into three age groups: 13–15, 16–18, and 19–22 years. Factor analysis confirmed the dimensions formulated to define the construct of family functioning: all the items of each dimension were loaded in the same factor with a correlation of at least 0.30. Groups differed with regard to the age on Cohesion, Enmeshed and Rigid scales: Younger adolescents (age 13–15 years) showed significantly higher scores than adolescents (age 16–18 and 19–22). Sex differences revealed that females had a higher mean score on Cohesion and Flexibility, whereas males had a higher mean score on Disengaged, Enmeshed and Chaotic. Correlations between FACES IV and Parent and Peer Attachment Scale demonstrated the convergent validity of the FACES IV. Data confirmed the validity of FACES IV’s Italian version and suggested that the Circumplex Model has a cross-cultural applicability and it could be a useful instrument in the Italian context.     

Limits in controlling the focus of attention

Abstract

In a series of five experiments, we attempted to answer three questions concerning the flexibility of visuospatial attention: Is it possible to exert control on the shape of the attentional focus? Can attention be distributed not uniformly but in a gradient fashion within the focus? Does the way in which attentional resources are distributed within the focus affect the way in which they are distributed outside its borders? We provide evidence indicating that observers successfully allocated attention to the cued region. When the cued region was demarcated by a polygon, target detection was speeded up within the polygon. The results also show that the observers were unable to suppress information arising from an irrelevant location falling between two relevant locations (Experiments 1, 2, 3A and 3B). In accord with the zoom lens model, we interpret these results as suggesting that attention forms a unitary zone that may expand to encompass multiple relevant locations but must also include the area between them. In addition, we found that some sort of lateral masking effect occurred when the borders were close to the target location. In Experiment 4, we obtained a gradient inside     

Attending to objects: costs or benefits?

The single-object advantage is said to occur when performance is faster and/or more accurate when the two targets to be compared appear on one object than when they appear on two different objects. The single-object advantage has been interpreted to suggest that attention can select objects rather than unparsed regions of visual space. In five experiments we explored whether directing attention to one object rather than two objects produces a benefit or a minor cost. Participants were required to compare two target features that belonged to one object, to two objects, or did not belong to any object. In addition, we varied the relevance to the task of object-related global information, such as symmetry of the object and perceptual cluttering of the background. Results showed that attending to one object in comparison to attending to no object produced a benefit only when object-related global information was relevant to the task. In contrast, when object-related global information was irrelevant to the task, attending to one object produced a cost. Thus, it can be concluded that attending to an object does not produce an absolute benefit, but rather produces a smaller cost than attending to two objects.     

REBT in a Therapeutic Community: REBTC

Long-term residential treatment--therapeutic communities--have some empirical support for efficacy but historically have been viewed as insulated and alien to the world of research. A therapeutic community with Rational Emotive Behavior Therapy as the core of its philosophy and practice is described, and follow-up results are presented. The argument is made that therapeutic communities may be particularly well suited to treatment of people with dual diagnoses.     

Therapists' verbal behavior category system

This paper presents the theoretical and methodological basis of a therapist's verbal behavior category system that allows us to study clinical psychologists' language from a functional-analytic framework and with a rigorous observation method. The procedure to develop the coding system is explained in detail from a very early stage of exploratory observation, to the systematic observation through the use of The Observer XT software. An analysis of intra- and inter-rater reliability using the kappa coefficient and taking into account the factors that affect the values of Cohen's index was carried out. Results show high levels of observer accuracy (between approximately 87% and 93%) that justify the application of this category system to study therapists' verbal behavior in session.     

Further evidence on the effects of symbolic distance on Stroop-like interference

Pavese and Umiltà found that, in an enumeration task, Stroop-like interference is larger when the digit identity is symbolically close to the enumeration response than when it is symbolically far. In two experiments testing 49 undergraduates, we further explored this phenomenon using Francolini and Egeth's paradigm. We found that symbolic distance affected interference even when the stimulus was briefly presented and masked. In Exp. 2, which tested numerosities outside the subitizing range, individuals used a different enumeration strategy but showed the same symbolic distance effect. These results support the hypothesis that Stroop interference found in enumeration tasks depends on a rapid and automatic activation of digits' magnitude representation. Received: 10 November 1997 / Accepted: 23 June 1998     

Solitude among contemplative cloistered nuns and monks: conceptualisation,coping and benefits of spiritually motivated solitude

There are rising perceptions and concerns about social isolation and the prevalence of loneliness in Western societies and their negative impact on people’s psychological well-being. We report on an ethnographic study conducted in two Catholic contemplative monasteries in Spain, focusing on the nuns’ and monks' voluntary search for solitude. Through in-depth interviews we aimed to explore their conceptualisation and experiences of solitude, the motivations behind their spiritual quest for it, and the benefits and challenges that this choice entailed. An extraordinary human template of searching for solitude emerged: although they lived communally (they were not alone), they actively avoided intimacy and closeness with other members of the community (they strove to feel alone out of their own volition). Human solitude was seen as the necessary condition for achieving perfect closeness with God and was interpreted not as leading to isolation but as a channel to communicate more intimately with God.