Constrained Candecomp/Parafac via the Lasso

The Candecomp/Parafac (CP) model is a well-known tool for summarizing a three-way array by extracting a limited number of components. Unfortunately, in some cases, the model suffers from the so-called degeneracy, that is a solution with diverging and uninterpretable components. To avoid degeneracy, orthogonality constraints are usually applied to one of the component matrices. This solves the problem only from a technical point of view because the existence of orthogonal components underlying the data is not guaranteed. For this purpose, we consider some variants of the CP model where the orthogonality constraints are relaxed either by constraining only a pair, or a subset, of components or by stimulating the CP solution to be possibly orthogonal. We theoretically clarify that only the latter approach, based on the least absolute shrinkage and selection operator and named the CP-Lasso, is helpful in solving the degeneracy problem. The results of the application of CP-Lasso on simulated and real life data show its effectiveness.     

Psychodynamic counselling in a university setting: A space for thinking together over emotional problems

Abstract

The authors describe their experience as psychoanalytically oriented psychotherapists at the Counselling Service for University Students of the Office for Student Affairs, Naples. In this service they have provided, for the last fourteen years, to any student who applies to it, up to four individual sessions, with the possibility of follow-up sessions, should the client ask for them after a few months. Both the procedure and the aims of the interventions are similar to those described by psychotherapists working at the Tavistock Clinic (Copley 1976; Salzberger-Wittenberg 1977) and the Brent Consultation Centre (Hurry 1986; Novick 1987) of London. The technique is an adjustment of the psychoanalytic one and the therapist undertakes a careful listening to the student's verbal and non-verbal communications. The main objective of the intervention is to enter into an alliance with the adult parts of the client in order to examine together his/her personal difficulties. A case report is presented, in order to exemplify both an emotional conflict which can interfere with academic success and the technique of the intervention.     

The Legitimate Name of a Fungal Plant Pathogen and the Ethics of Publication in the Era of Traceability

When more scientists describe independently the same species under different valid Latin names, a case of synonymy occurs. In such a case, the international nomenclature rules stipulate that the first name to appear on a peer-reviewed publication has priority over the others. Based on a recent episode involving priority determination between two competing names of the same fungal plant pathogen, this letter wishes to open a discussion on the ethics of scientific publications and points out the necessity of a correct management of the information provided through personal communications, whose traceability would prevent their fraudulent or accidental manipulation.

     

The evolution of family interventions for schizophrenia. A tribute to Gianfranco Cecchin

Family intervention for schizophrenia has informed the whole history of family therapy, although in different fashions. This presentation will deal with the main phases of such intervention, outlining the characteristic features of each one. We can roughly divide the history of family intervention for schizophrenia into four phases: Phase 1 – Conjoint family therapy (1955–1965). Family interventions were aimed at modifying family communication patterns, implying the possibility of a definitive resolution of psychopathology. Phase 2 – Antipsychiatry (1965–1975). This, rather than a treatment model, was a philosophy of psychiatry, which considered schizophrenia as an epiphenomenon of the distortions of Western society. Family treatment was aimed at promoting the awareness of such a dynamic. Phase 3 – Milan systemic therapy (1975–1985). The systemic model was aimed at helping people with schizophrenia to recognize their position within their families (and other significant systems), giving all family members a new sense of their relationships to each other. Phase 4 – Psychoeducation (1985–2005). In most psychoeducational models, schizophrenia was conceived of as a biologically determined disorder. Psychoeducation was a way of helping the not diagnosed family members to cope with problems brought about by the illness, eliciting consensus towards psychiatric treatments such as medication and rehabilitation. A fifth phase of family intervention for schizophrenia is probably developing right now. If this is happening it should probably be an integrative phase, in which different approaches to family dynamics might be bridged and blended, in order to give more effective help to all members of families with schizophrenia.     

Determining the environment: a modal logic for closed interaction

The aim of the work is to provide a language to reason about Closed Interactions, i.e. all those situations in which the outcomes of an interaction can be determined by the agents themselves and in which the environment cannot interfere with they are able to determine. We will see that two different interpretations can be given of this restriction, both stemming from Pauly Representation Theorem. We will identify such restrictions and axiomatize their logic. We will apply the formal tools to reason about games and their regulation.     

Extended Life

This paper reformulates some of the questions raised by extended mind theorists from an enactive, life/mind continuity perspective. Because of its reliance on concepts such as autopoiesis, the enactive approach has been deemed internalist and thus incompatible with the extended mind hypothesis. This paper answers this criticism by showing (1) that the relation between organism and cogniser is not one of co-extension, (2) that cognition is a relational phenomenon and thereby has no location, and (3) that the individuality of a cogniser is inevitably linked with the question of its autonomy, a question ignored by the extended mind hypothesis but for which the enactive approach proposes a precise, operational, albeit non-functionalist answer. The paper raises a pespective of embedded and intersecting forms of autonomous identity generation, some of which correspond to the canonical cases discussed in the extended mind literature, but on the whole of wider generality. In addressing these issues, this paper proposes unbiased, non-species specific definitions of cognition, agency and mediation, thus filling in gaps in the extended mind debates that have led to paradoxical situations and a problematic over-reliance on intutions about what counts as cognitive.

Effects of writing about emotions versus goals on psychological and physical health among third-year medical students

A randomized, controlled trial compared writing about emotional topics (EMO) to writing about goals as the "best possible self" (BPS; after King, 2001) and evaluated emotional approach coping, i.e., efforts to cope through processing and expressing emotion, as a moderator of writing effects on psychological and physical health in 64 third-year medical students. In participants with higher baseline hostility, the EMO condition was associated with less hostility at 3 months compared to the BPS and control conditions. Emotional processing (EP) and emotional expression (EE) moderated the effect of experimental condition on depressive symptoms at 3 months; high EP/EE participants reported fewer depressive symptoms in the EMO condition, whereas low EP/EE individuals reported fewer depressive symptoms in the BPS condition compared to the EMO and control conditions. A moderating effect of EP on physical health was also identified, such that low EP individuals who wrote about goals (BPS) had fewer health care visits at 3 months compared to low EP participants in the EMO and control conditions.     

On the short horizon of spontaneous iterative reasoning in logical puzzles and games

A reasoning strategy is iterative when the initial conclusion suggested by a set of premises is integrated into that set of premises in order to yield additional conclusions. Previous experimental studies on game theory-based strategic games (such as the beauty contest game) observed difficulty in reasoning iteratively, which has been partly attributed to bounded individual rationality. However, this difficulty has also been attributed to problems in adequately representing the beliefs, actions, and goals of other agents involved in the games. In four experiments, we observed similar difficulties in iterative reasoning in a variety of puzzles and games that did not involve social interactions with other agents, where they can only be caused by individual cognitive boundaries. Our findings are consistent with the hypothesis that an intrinsic difficulty in iterative reasoning originates from a tendency not to revise our initial mental representation of a problem in light of the initial conclusions that it implies.