DSpace Repository :: Browsing by Author "Martínez, Claudio"

Browsing by Author "Martínez, Claudio"

Now showing 1 - 10 of 10

Biological stress reactivity as an index of the two polarities of the experience model
(2017) Silva, Jaime R.; Vivanco-Carlevari, Anastassia; Barrientos, Mauricio; Martínez, Claudio; Salazar, Luis A.; Krause, Mariane
The two-polarities model of personality argues that experience is organized around two axes: interpersonal relatedness and self-definition. Differential emphasis on one of these poles defines adaptive and pathological experiences, generating anaclitic or introjective tendencies. The anaclitic pattern, on one hand, has been conceptually related with an exaggerated emphasis on interpersonal relatedness. On the other hand, the introjective pattern has been connected to high levels of self-criticism. The aim of this study was to investigate the psychophysiological basis for this relationship. Specifically, we hypothesized that the anaclitic individual should have a higher biological reactivity to stress (BRS), measured by the cortisol concentration in saliva, in an interpersonal stress induction protocol (Trier Social Stress Test). Contrary to what was expected, the results indicated that introjective participants presented a higher BSR than the anaclitic group. Interestingly, in contrast to their higher BSR, the introjective group reported a diminished subjective stress in relation to the average. In the anaclitic group, a tendency that goes in the opposite direction was found. Theoretical implications of these findings were discussed.
Comparative transcriptome assembly and genome-guided profiling for Brettanomyces bruxellensis LAMAP2480 during p-coumaric acid stress
(Nature Publishing Group, 2016) Godoy, Liliana; Vera, Patricia; Martínez, Claudio; Ugalde, Juan; Ganga, María
Brettanomyces bruxellensis has been described as the main contaminant yeast in wine production, due to its ability to convert the hydroxycinnamic acids naturally present in the grape phenolic derivatives, into volatile phenols. Currently, there are no studies in B. bruxellensis which explains the resistance mechanisms to hydroxycinnamic acids, and in particular to p-coumaric acid which is directly involved in alterations to wine. In this work, we performed a transcriptome analysis of B. bruxellensis LAMAP248rown in the presence and absence of p-coumaric acid during lag phase. Because of reported genetic variability among B. bruxellensis strains, to complement de novo assembly of the transcripts, we used the high-quality genome of B. bruxellensis AWRI1499, as well as the draft genomes of strains CBS2499 and0 g LAMAP2480. The results from the transcriptome analysis allowed us to propose a model in which the entrance of p-coumaric acid to the cell generates a generalized stress condition, in which the expression of proton pump and efflux of toxic compounds are induced. In addition, these mechanisms could be involved in the outflux of nitrogen compounds, such as amino acids, decreasing the overall concentration and triggering the expression of nitrogen metabolism genes.
Discourse-voice regulatory strategies in the psychotherapeutic interaction: a state-space dynamics analysis
(2015) Tomicic, Alemka; Martínez, Claudio; Pérez Ewert, J. Carola; Hollenstein, Tom; Angulo, Salvador; Gerstmann, Adam; Barroux, Isabelle; Krause, Mariane
This study seeks to provide evidence of the dynamics associated with the configurations of discourse-voice regulatory strategies in patient–therapist interactions in relevant episodes within psychotherapeutic sessions. Its central assumption is that discourses manifest themselves differently in terms of their prosodic characteristics according to their regulatory functions in a system of interactions. The association between discourse and vocal quality in patients and therapists was analyzed in a sample of 153 relevant episodes taken from 164 sessions of five psychotherapies using the state space grid (SSG) method, a graphical tool based on the dynamic systems theory (DST). The results showed eight recurrent and stable discourse-voice regulatory strategies of the patients and three of the therapists. Also, four specific groups of these discourse-voice strategies were identified. The latter were interpreted as regulatory configurations, that is to say, as emergent self-organized groups of discourse-voice regulatory strategies constituting specific interactional systems. Both regulatory strategies and their configurations differed between two types of relevant episodes: Change Episodes and Rupture Episodes. As a whole, these results support the assumption that speaking and listening, as dimensions of the interaction that takes place during therapeutic conversation, occur at different levels. The study not only shows that these dimensions are dependent on each other, but also that they function as a complex and dynamic whole in therapeutic dialog, generating relational offers which allow the patient and the therapist to regulate each other and shape the psychotherapeutic process that characterizes each type of relevant episode.
Disentangling the change–alliance relationship: Observational assessment of the therapeutic alliance during change and stuck episodes
(2016) Mellado, Augusto; Suárez, Nicolás; Altimir, Carolina; Martínez, Claudio; Pérez Ewert, J. Carola; Krause, Mariane
The therapeutic alliance is considered the most robust process variable associated with positive therapeutic outcome in a variety of psychotherapeutic models [Alexander, L. B., & Luborsky, L. (1986). The Penn Helping Alliance Scales. In L. S. Greenberg & W. M. Pinsoff (Eds.), The psychotherapeutic process: A research handbook (pp. 325–356). New York: Guilford Press; Horvath, A. O., Gaston, L., & Luborsky, L. (1993). The alliance as predictor of benefits of counseling and therapy. In N. Miller, L. Luborsky, J. Barber, & J. P. Docherty (Eds.), Psychodynamic treatment research: A handbook for clinical practice (pp. 247–274). New York, NY: Basic Books; Horvath, A. O., Del Re, A. C., Flückiger, C., & Symonds, D. (2011). Alliance in individual psychotherapy. Psychotherapy, 48, 9–16; Orlinky, D., Grawe, K., & Parks, B. (1994). Process and outcome in psychotherapy: Noch einmal. In A. Bergin & J. S. Garfield (Eds.), Handbook of psychotherapy and behaviour change (4th ed., pp. 270–378). New York, NY: Wiley and Sons]. The relationship between alliance and outcome has traditionally been studied based on measures that assess these therapy factors at a global level. However, the specific variations of the alliance process and their association with therapy segments that are relevant for change have not yet been fully examined. The present study examines the variations in the therapeutic alliance in 73 significant in-session events: 35 change and 38 stuck episodes identified through the observation of 14 short-term therapies of different theoretical orientations. Variations in the alliance were assessed using the VTAS-SF [Shelef, K., & Diamond, G. (2008). Short form of the revised Vanderbilt Therapeutic Alliance Scale: Development, reliability, and validity. Psychotherapy Research, 18, 433–443]. Nested analyses (HLM) indicate a statistically significant better quality of the alliance during change episodes.
Introjective Individuals Tend Toward Anhedonia: Self-Report and Experimental Evidence
(2018) Silva, Jaime R.; Vivanco-Carlevari, Anastassia; Martínez, Claudio; Krause, Mariane
A broad line of research has conceptualized personality based on the interaction of two aspects: interpersonal relatedness and self-definition. This theoretical corpus understands these functions as two poles according to the patterns of interaction and relevance in personality. Additionally, the exacerbation of one of these poles generates a psychopathological model that identifies three types of depressive experience: anaclitic, introjective, or mixed pattern. Understanding the lack of interest as a key symptom of depression, this experiment evaluates a relation for anhedonia and the polarities model configuration using an empirical and experimental protocol. We tested 177 individuals using the Beck Depression Inventory (BDI) subscale for anhedonia and a visual discrimination task with a specific reward system, which was implemented to study reinforcement sensitivity. Participants were classified into four groups by the polarities of experience model. The subscale’s results showed that individuals with an introjective character exhibited an enhanced anhedonic symptomatology but no co-occurrence of this evidence on the experimental protocol. These results empirically support the two polarities of the depressive personality model and raise new questions regarding how to experimentally test this relation.
Mentalizing in psychotherapy: patients’ and therapists’ reflective functioning during the psychotherapeutic process
(2019) Cerda, Cecilia de la; Tomicic, Alemka; Pérez, J. Carola; Martínez, Claudio; Morán, Javier
There has been a growing interest in mentalization in clinical research given its relationship with normal and psychopathological functioning and its explanatory potential as a mechanism of psychotherapeutic change. This study uses the Reflective Functioning Scale (RFS) to identify and characterize mentalization manifestations in sychotherapeutic interaction. Method: the RFS was applied to a sample of relevant episodes — 44 sessions from five different psychotherapy processes carried out with adult patients who had different diagnoses. Results: we observed a higher probability of reflective functioning (RF) passages in relevant events than in neutral segments. There were no differences in the RF passages according to episode or actor type, but there were in RF Failures, which is more likely in patients and during rupture episodes. Discussion: although certain modifications are necessary, the RFS can be applied to clinical material, and it is a promising strategy for the study of mentalization within psychotherapy.
Verbal and nonverbal expressions of mutual regulation in relevant episodes of psychotherapy
(2016) Morán, Javier; Martínez, Claudio; Tomicic, Alemka; Pérez Ewert, J. Carola; Krause, Mariane; Guzmán, Marcela
The purpose of this paper is to describe verbal and nonverbal expressions of mutual regulation between patients and therapists through the analysis of relevant episodes of five psychotherapy processes. Microanalyses of discourse, vocal quality and facial expression of emotions were conducted on both patients and therapists in 67 Episodes of Change and 86 Episodes of Rupture of the Therapeutic Alliance. The analyses were carried out using hierarchical regression, showing that both Episodes of Change and Episodes of Rupture correspond to interactional scenarios where patients and therapists use different forms of speech, vocal qualities and facial expressions that account for specific regulation processes which are coherent with such scenarios.
Vocalization---Silence Dynamic Patterns: A system for measuring coordination in psychotherapeutic dyadic conversations
(2016) Tomicic, Alemka; Pérez Ewert, J. Carola; Martínez, Claudio; Rodríguez, Eugenio
This paper presents the Vocalization---Silence Dynamic Patterns (VSDP) method for the analysis of coordination in psychotherapeutic conversation. The objectives of its development are to empirically account for vocal coordination patterns in dialogs and to examine the association between interactional coordination and positive relational outcomes. The VSDP method makes it possible to demonstrate that vocal activity is a nonverbal phenomenon entwined with and which influences the linguistic code. The analyses which can be carried out through this method are illustrated with real acoustic signals taken from psychotherapy segments. The VSDP method is discussed, considering its usefulness for psychotherapeutic research as well as the study of dyadic conversation within other scenarios.
"Working Alliance Inventory" Versión Observacional: Traducción, Adaptación y Validación al Castellano
(2013) Vöhringer C., Carlos; Pérez Ewert, J. Carola; Martínez, Claudio; Altimir, Carolina; Dagnino, Paula; Suárez, Nicolás; Krause, Mariane
La investigación ha demostrado la fuerte relación entre alianza terapéutica y resultados en psicoterapia. Una buena alianza está asociada a mejores resultados en psicoterapia. Para medir alianza se han desarrollado una serie de instrumentos para terapeutas, pacientes, y observadores. Los instrumentos observacionales son menos intrusivos, disminuyendo los posibles efectos que las mediciones tendrían en el tratamiento. Además, han resultado más válido en algunas poblaciones clínicas. En Chile no se cuenta con un instrumento confiable y validado que mida alianza terapéutica desde la perspectiva de un observador. El presente artículo da cuenta de la traducción al castellano, y la adaptación y validación del WorkAlliance Inventory (WAI-0) en su versión observacional para Chile. El (WAI-0) es un instrumento válido y confiable para medir alianza terapéutica.
“Working Alliance Inventory” Versión Observacional: Traducción, Adaptación y Validación al Castellano
(2013) Vöhringer C., Carlos; Pérez, Carola; Martínez, Claudio; Altimir, Carolina; Dagnino, Paula; Suárez, Nicolás; Krause, Mariane
La investigación ha demostrado la fuerte relación entre alianza terapéutica y resultados en psicoterapia. Una buena alianza está asociada a mejores resultados en psicoterapia. Para medir alianza se han desarrollado una serie de instrumentos para terapeutas, pacientes, y observadores. Los instrumentos observacionales son menos intrusivos, disminuyendo los posibles efectos que las mediciones tendrían en el tratamiento. Además, han resultado más válido en algunas poblaciones clínicas. En Chile no se cuenta con un instrumento confiable y validado que mida alianza terapéutica desde la perspectiva de un observador. El presente artículo da cuenta de la traducción al castellano, y la adaptación y validación del Work Alliance Inventory (WAI-0) en su versión observacional para Chile. El (WAI-0) es un instrumento válido y confiable para medir alianza terapéutica.

Browsing by Author "Martínez, Claudio"

Results Per Page

Sort Options