Systematic Review - Recent studies have identified potential change within interpersonal relationships following mindfulness-based interventions such as MBSR and MBCT; however, few studies have explored this in a clinical sample, from the participants’ perspective. This study aimed to explore this phenomenon by synthesising qualitative studies to answer the following question: How do people with a mental health diagnosis experience interpersonal change following MBSR and MBCT. A systematic search strategy identified 117 studies, of which 12 met the final inclusion criteria. A thematic synthesis was conducted based on the protocol developed by Thomas and Harden (2008). The thematic synthesis revealed an overall theme of connection, with subthemes of ‘the group as a community’; ‘reconnecting with the self’; ‘skill development’ and ‘reconnecting with others’. These themes were further synthesised to consider the interconnections between them. This revealed two points of interest: the power of the group community and intra- to inter-personal development. These themes were explored in relation to existing literature. The results are discussed in relation to the limitations of the study, and future research recommendations are considered. Empirical Paper - Mindfulness-based cognitive therapy (MBCT) have been shown to be effective in reducing the impact of cognitive reactivity (CR) and improving outcomes for people with recurrent depression. It has been proposed that this effect may be mediated by the cultivation of self-compassion; however, there is limited research into this mechanism. This study aimed to explore the lived experience of a sad mood induction and compassionate repair in people with currently remitted recurrent depression, with and without experience of MBCT. Sixteen participants were recruited (10 MBCT, six non-MBCT). Participants underwent a two-phase mood manipulation, sad mood induction and loving-kindness meditation (directed to a loved one and the self) and completed self-report measures before and after each task. Following this, participants engaged in a semi-structured interview exploring their experiences. The results showed both mood manipulations were successful, and mood repair was apparent within all but one of the participants. The interviews were analysed using thematic analysis, identifying six key themes: vulnerability versus tolerance of depression; immersion versus transience of cognitive and emotional reactivity; avoidance versus tolerance of compassion; self-criticism versus self-acceptance; locus of control and mechanisms of repair. No differences were observed between the two groups in their qualitative or quantitative responses to the mood manipulations; however, those in the MBCT group with a greater level of current MBCT practice, appeared more able to transcend negative thinking and utilise the Loving Kindness Meditation (LKM) more effectively for both themselves and others. The results are discussed in relation to study limitations and their implication to clinical practice.

Depuis une vingtaine d’années, le modèle cognitif basé sur les interprétations (Groupe de recherche sur la cognition dans le trouble obsessionnel compulsif [OCCWG], 1997, 2001, 2003, 2005) représente le modèle psychologique de l’étiologie et du maintien du TOC le plus étudié au plan empirique. Cependant, peu de recherches ont porté sur les deux postulats importants du modèle touchant respectivement le développement des croyances liées à l’obsessionnalité et la contribution des états affectifs au maintien des interprétations et des croyances (réactivité cognitive). L’objectif de cette thèse est de contribuer à la validation empirique de ces postulats. Fondé sur un devis corrélationnel dans un échantillon de participants mixte (participants troubles obsessionnels-compulsifs et participants non cliniques), le premier article étudie les liens entre les expériences de l’enfance et la présence de croyances obsessionnelles chez l’adulte. Deux modèles alternatifs sont comparés qui représentent d’une part un lien spécifique, et d’autre part un lien non spécifique entre les expériences de l’enfance et les croyances obsessionnelles adultes. Les résultats suggèrent la présence à la fois de relations spécifiques et non spécifiques entre les expériences de l’enfance et les croyances adultes. Les expériences de l’enfance et les domaines de croyance obsessionnels qui montrent des liens spécifiques sont ceux relatifs à la responsabilité, à la perception du danger, et au perfectionnisme. En contrepartie, les expériences de l’enfance relatives à la perception de danger et dans une moindre mesure la sociotropie, apparaissent étroitement liés à la plupart des domaines de croyances adultes (intolérance à l’incertitude, surestimation du danger, importance et contrôle des pensées). Dans la seconde étude, nous nous intéressons à la mesure et l’analyse longitudinales de la réactivité cognitive telle qu’elle s’exprime dans l’environnement naturel de huit participants troubles obsessionnels-compulsifs de type ruminateur. Par le biais de huit protocoles à cas uniques intensifs, l’analyse de contingence entre les scores quotidiens d’humeur (4 états émotionnels cotés par participant) et d’interprétations (une interprétation idiographique des intrusions par participant) permet d’établir une mesure de l’importance de la réactivité cognitive chez chaque participant. Ces résultats sont ensuite analysés du point de vue des postulats principaux de deux modèles spécifiques de la réactivité cognitive (modèle de l’Infusion de l’affect [Forgas, 2008] et modèle de l’Humeur comme intrant [Meeten & Davey, 2011]. Ainsi, les analyses intra-individuelles répétées trans-comportements) et interindividuelles (trans-participants) permettent d’illustrer le rôle proximal déterminant des stratégies de traitement de l’information (traitement systématique; traitement superficiel; traitement altéré) employées par les participants. En résumé, les résultats obtenus dans ces deux études fournissent des données utiles à la poursuite de la validation du modèle des interprétations du TOC. Dans la première étude, l’identification de liens spécifiques entre les EE et les croyances obsessionnelles soutient la séquence étiologique postulée, alors que l’identification de liens non spécifiques suggère que d’autres trajectoires étiologiques peuvent être pertinentes. Dans la seconde étude, l’analyse longitudinale et naturaliste des covariations humeur – interprétations se révèle d’abord féconde à identifier les phénomènes de réactivité cognitive postulés dans le modèle des interprétations. Ensuite, en conformité aux modèles intégrés de la réactivité cognitive, l’analyse des liens entre cette réactivité et les stratégies privilégiées de neutralisation des participants permet d’identifier le rôle clé des différentes stratégies de traitement de l’information dans la réactivité cognitive. / Over the past twenty years, the «appraisal model» of obsessive-compulsive disorder (OCD) (Obsessive Compulsive Cognition Working Group, 1997, 2001, 2003, and 2005) has drawn most of the empirical research on the psychological etiology and maintenance of the disorder. Nevertheless, only a few studies addressed two important postulates of the model, which is the development of beliefs associated with OCD, and the contribution of affective states to the maintenance of appraisals and beliefs (p. ex., cognitive reactivity). The current thesis aims to contribute to the empirical validation of these postulates. Based on a retrospective correlational design in a mixed (OCD and normal) sample, the first article aims to explore the links between childhood experiences (CEs) and adult OCD related beliefs. Two alternative etiological models are compared emphasizing either a rather specific association between different CEs and beliefs; or conversely, a broad non-specific association between CEs and different OCD related beliefs. Results support both the existence of specific and non-specific associations between CEs and beliefs. CEs and OCD related beliefs that showed specific links were those CEs that showed specific links to OCD related beliefs were those related to the concepts of Responsibility (R-E and OBQ-R), Threat perception (TP-E et OBQ-T), and Perfectionism (SO-E et OBQ-P). On the other hand, CEs emphasizing Threat perception (TP-E) and Sociotropy (SOC-E) related experiences also showed significant links with most OCD related beliefs (Intolerance of uncertainty [OBQ-U], Overestimation of threat [OBQ-T], Importance and Control of thoughts [OBQ-I et OBQ-C]). The aim of the second article is to assess and analyze cognitive reactivity in an OCD sample (rumination subtype) through a longitudinal naturalistic design (eight intensive single-case designs). In a first step, the contingency analysis between daily mood-states scores (4 mood-states in each participant) and daily thought appraisals (one idiosyncratically defined thought appraisal in each participant) allows for the assessment of the magnitude and rate of cognitive reactivity in each participant. On the basis of integrative models of cognitive reactivity (Affect Infusion Model, and Mood as input Hypothesis) further repeated intra-individual analyses (across subjects) and inter-individual analyses (between subjects) illustrate the critical proximal role of different processing strategies used by the participants. In summary, both studies provide results that contribute to further the validation of the appraisal model of OCD. In the first study, the identification of specific links between CEs and OCD related beliefs in adults supports the postulated etiological sequence; while the identification of non-specific links suggest that other etiological paths may be relevant In the second study, the longitudinal investigation of covariations between mood-states and appraisals of thoughts allows to reveal the expected cognitive reactivity processes. Such processes are further supported with reference to integrated models of cognitive reactivity that emphasize the critical role of different processing strategies in their expression.