Low Self-Esteem as a Risk Factor for Loneliness in Adolescence: Perceived - but not Actual - Social Acceptance as an Underlying Mechanism

Low self-esteem has been shown to relate to concurrent and later feelings of loneliness in adolescence. However, it remains unclear why low self-esteem puts adolescents at risk for experiencing loneliness. Further, longitudinal research on the direction of effects between loneliness and self-esteem is virtually non-existent. The present study aims to fill these gaps in the literature. First, the direction of effects between loneliness and self-esteem was investigated in two independent longitudinal studies: a five-wave study sampling Dutch adolescents (M age?=?15.22 years at T1; 47 % female; N?=?428) and a three-wave study sampling Belgian adolescents (M age?=?14.95 years at T1; 63 % female; N?=?882). Second, the underlying role of social acceptance was investigated in the latter sample by applying a multi-method approach that included actual (i.e., peer-reported) and perceived (i.e., self-reported) social acceptance. Results indicated that self-esteem and loneliness influenced one another in a reciprocal manner. Furthermore, the dominant path from self-esteem to loneliness was partially mediated by perceived—but not actual—social acceptance. The importance of distinguishing actual from perceived social acceptance is discussed, and suggestions for future research are outlined.     

Distinct consolidation outcomes in a visuomotor adaptation task: Off-line leaning and persistent after-effect

Consolidation is a time-dependent process responsible for the storage of information in long-term memory. As such, it plays a crucial role in motor learning. In two experiments, we sought to determine whether one’s performance influences the outcome of the consolidation process. We used a visuomotor adaptation task in which the cursor moved by the participants was rotated 30° clockwise. Thus, participants had to learn a new internal model to compensate for the rotation of the visual feedback. The results indicated that when participants showed good adaptation in the first session, consolidation resulted in a persistent after-effect in a no-rotation transfer test; they had difficulty returning to their normal no-rotation internal model. However, when participants showed poor adaptation in the first session, consolidation led to significant off-line learning (between sessions improvement) but labile after-effects. These observations suggest that distinct consolidation outcomes (off-line learning and persistent after-effect) may occur depending on the learner’s initial performance.     

Long-lasting memory for an odor acquired at the mother's breast

Whether neonatal odor memory can persist into toddlerhood and influence behaviors that tap processes related to cognition (attention and exploration), motivation (choice and consumption), and emotion (hedonic processing) remains under-researched. Using a quasi-experimental longitudinal design, we examined whether an odor experienced at the mother's breast can be retained at 7 and 21 months. The prescribed prophylactic use of a camomile-scented balm defined two groups: infants exposed (CaE) or never exposed (CaNE) to camomile odor. At 7 months, exploratory responses to three similar objects differing in odor (including camomile) were analyzed. At 21 months, three tasks were used to assess toddlers' (i) facial responses; (ii) exploratory responses to three similar, but differently odorized objects; and (iii) choices between two bottles carrying different odors. CaE infants displayed preferential responses for camomile odor at both ages in every task. In contrast, CaNE infants behaved either randomly or more negatively to camomile odor. This study indicates that early odor memories acquired during breastfeeding can be reactivated and influence behavioral processes until at least toddlerhood.     

Multidimensional Unfolding by Nonmetric Multidimensional Scaling of Spearman Distances in the Extended Permutation Polytope

A multidimensional unfolding technique that is not prone to degenerate solutions and is based on multidimensional scaling of a complete data matrix is proposed: distance information about the unfolding data and about the distances both among judges and among objects is included in the complete matrix. The latter information is derived from the permutation polytope supplemented with the objects, called the preference sphere. In this sphere, distances are measured that are closely related to Spearman's rank correlation and that are comparable among each other so that an unconditional approach is reasonable. In two simulation studies, it is shown that the proposed technique leads to acceptable recovery of given preference structures. A major practical advantage of this unfolding technique is its relatively easy implementation in existing software for multidimensional scaling.     

Cognitive confidence in obsessive-compulsive disorder: distrusting perception, attention and memory

Previous studies have established that obsessive-compulsive disorder (OCD) is characterised by significant levels of distrust in memory (e.g. for actions). Ironically, this lowered confidence is at least in part due to repeated checking, which is assumed to lower perceptual processing and thereby reduces vividness and detail of the recollections. In a previous study, Hermans, D., Martens, K., De Cort, K., Pieters, G., and Eelen, P. [(2003). Reality monitoring and metacognitive beliefs related to cognitive confidence in OCD. Behaviour Research and Therapy, 41, 383-401] observed that OCD is not only characterised by reduced confidence in memory, but also by a similar distrust in attention (Hermans et al., 2003). The present study aimed at replicating and extending this finding. It was observed (a) that patients suffering from OCD showed less confidence in attention and memory than a clinical and a nonclinical control group; (b) that confidence in attention was uniquely related to checking behaviour, and (c) that repeated checking caused increased levels of distrust in attention. In addition, it was observed that cognitive distrust while performing OCD-related actions not only extends to attention, but also to perception. It is argued that research on metacognition in OCD should move beyond the study of memory.     

Why Do You Regulate What You Eat? Relationships Between Forms of Regulation, Eating Behaviors, Sustained Dietary Behavior Change, and Psychological Adjustment

In 3 studies, the authors examined how autonomous and controlled forms of motivation for the regulation of eating behaviors were related to self-reported eating behaviors, and sustained dietary behavior change. Studies 1 and 2 supported the factorial structure and the psychometric properties of a scale designed to measure different forms of regulation as defined by Self-Determination Theory. A motivational model of the regulation of eating behaviors suggested that an autonomous regulation was positively associated with healthy eating behaviors whereas a controlled regulation was positively associated with dysfunctional eating behaviors and negatively associated with healthy eating behaviors. In Study 3, long-term adherence to healthier dietary behaviors in a population at risk for coronary artery disease was examined over a 26-week period. A general measure of self-determined motivation assessed at week 1 was found to be a reliable predictor of the level of self-determination for eating behaviors 13 weeks later. In turn, self-determination for eating behaviors was a significant predictor of dietary behavior changes at 26 weeks. Finally, the dietary behavior measures were related to improvements in weight and blood lipid parameters (LDL-cholesterol, HDL-cholesterol, triglycerides). Results are discussed in terms of their implication for the integration and maintenance of a successful healthy regulation.     

Strong Completeness Theorems for Weak Logics of Common Belief

We show that several logics of common belief and common knowledge are not only complete, but also strongly complete, hence compact. These logics involve a weakened monotonicity axiom, and no other restriction on individual belief. The semantics is of the ordinary fixed-point type.     

Phonological similarity in free and serial recall: The effect of increasing retention intervals

The phonological similarity effect (or acoustic confusion effect) consists of poor serial recall performance for lists composed of similar‐sounding words compared to lists of dissimilar‐sounding items. Building on the work of Nairne and Kelley (1999), the extent to which this classical verbal short‐term memory effect changes over the course of a retention interval was investigated. The impact of the phonological similarity on memory performance over time was compared in three paradigms: order reconstruction, serial recall, and free recall. Participants were presented with two blocks of 15 lists composed of five monosyllabic words, one block containing phonologically similar words and the other phonologically distinct words. Recall occurred either after 2, 8, or 24 seconds retention interval filled with a digit shadowing task. Our results confirmed and extended those of Nairne and Kelley. In order reconstruction and serial recall tasks, a classical phonological similarity effect (i.e., decrement in performance with similar lists) was observed for the 2‐s retention interval. This effect disappeared after a brief period of digit shadowing (i.e., 8‐s delay) and a beneficial effect of similarity was observed for the 24‐s retention interval. In the free recall task, the phonological similarity produced better performance whatever the delay between presentation and recall. Those results are discussed in the light of Nairne's (1990a) feature model and confirm the role of item‐specific and inter‐item processes in order reconstruction, serial recall, and free recall. L'effet de similarité phonologique se manifeste par une performance de rappel plus faible lorsque les listes sont composées de mots dont la sonorité est proche que lorsque les mots sont de sonorité éloignée. Sur la base de la recherche de Nairne et Kelley (1999), nous nous sommes intéressés à la manière dont évolue cet effet classique de mémoire à court terme verbale dans le temps, C'est‐à‐dire à L'issue d'intervalles de rétention de durées variables. L'impact de la similarité phonologique sur la performance mnésique a été évaluée sur la base de trois paradigmes, la reconstruction de L'ordre, le rappel sériel et le rappel libre. Les participants ont été soumis à deux blocs de 15 listes comportant 5 mots monosyllabiques, un bloc comprenant des mots similaires phonologiquement et un bloc comprenant des mots dissimilaires phonologiquement. Le rappel est demandé après un intervalle de rétention d'une durée de 2, 8 ou 24 secondes durant lequel une tâche de shadowing de chiffres est proposée. Nos résultats confirment et étendent ceux obtenus par Nairne et Kelley. Pour les tâches de reconstruction de L'ordre et de rappel sériel, un effet de similarité phonologique classique (i.e., chute des performances pour les listes similaires) est observé avec un intervalle de rétention de 2 secondes. Cet effet disparaît après une courte période consacrée au shadowing de chiffres (i.e., 8 secondes) et un effet bénéfique de la similarité est observé pour un intervalle de rétention de 24 secondes. En rappel libre, la similarité phonologique provoque une amélioration des performances quel que soit le délai entre présentation et rappel. Ces résultats sont discutés à la lumière du modèle des traits de Nairne (1990a). Ils confirment le rôle des traitements spécifiques à L'item et des traitements inter‐items lors de tâches telles que la reconstruction de L'ordre, le rappel sériel et libre. El efecto de la similitud fonológica (o efecto de confusión acústica) se manifiesta en fallas en el recuerdo de series para las listas compuestas por palabras que tienen sonidos similares en comparación con aquéllas que poseen elementos distintos. Con base en el trabajo de Nairne en Kelley (1999), se investigó la medida en la que este efecto clásico de memoria reciente cambia a lo largo del curso de un intervalo de retención. El impacto de la similitud fonológica sobre el desempeño de la memoria a lo largo del tiempo se comparó en tres paradigmas, reconstrucción del orden, recuerdo de series y recuerdo libre. Se presentó a los participantes dos bloques de 15 listas compuestas por 5 palabras monosilábicas, un bloque contenía palabras fonológicamente similares y, el otro, palabras fonológicamente distintas. El recuerdo ocurrió después de un intervalo de retención de 2, 8 ó 24 segundos lleno de una tarea digital de sombreado. Los resultados confirmaron y extendieron los de Nairne en Kelley. En las tareas de reconstrucción del orden y en la recuerdo de series, se observó un efecto clásico de similitud fonológica para el intervalo de retención de 2 segundos (es decir, disminución de la ejecución con listas similares). Este efecto desapareció después de un breve periodo de sombreado digital (es decir, un retraso de 8 segundos) y se observó un efecto benéfico de similitud para el intervalo de retención de 24 segundos. En la tarea de recuerdo libre, la similitud fonológica produjo mejor ejecución independientemente del retraso entre la presentación y el recuerdo. Tales resultados se discuten a la luz del modelo de Nairne (1990a) y confirman el papel que desempeñan los procesos de reactivo específico e interreactivo en la reconstrucción del orden, y en el recuerdo de series y libre.     

Moderators of Parent Training for Disruptive Behaviors in Young Children with Autism Spectrum Disorder

We conducted a 6 month, randomized trial of parent training (PT) versus a parent education program (PEP) in 180 young children (158 boys, 22 girls), ages 3–7 years, with autism spectrum disorder (ASD). PT was superior to PEP in decreasing disruptive and noncompliant behaviors. In the current study, we assess moderators of treatment response in this trial. Thirteen clinical and demographic variables were evaluated as potential moderators of three outcome variables: the Aberrant Behavior Checklist-Irritability subscale (ABC-I), Home Situations Questionnaire (HSQ), and Clinical Global Impressions-Improvement Scale (CGI-I). We used an intent-to-treat model and random effects regression. Neither IQ nor ASD severity moderated outcome on the selected outcome measures. Severity of Attention Deficit Hyperactivity Disorder (ADHD) and anxiety moderated outcomes on the ABC-I and HSQ. For instance, there was a 6.6 point difference on the ABC-I between high and low ADHD groups (p?=?.05) and a 5.3 point difference between high and low Anxiety groups (p?=?.04). Oppositional defiant disorder symptoms and household income moderated outcomes on the HSQ. None of the baseline variables moderated outcome on the CGI-I. That IQ and ASD symptom severity did not moderate outcome suggests that PT is likely to benefit a wide range of children with ASD and disruptive behavior.