55 results match your criteria: "Leiden University Institute for Psychological Research[Affiliation]"

The role of childhood abuse in HPA-axis reactivity in Social Anxiety Disorder: a pilot study.

Biol Psychol

January 2010

Leiden University Institute for Psychological Research, Clinical Psychology Unit, Leiden, The Netherlands.

Background: Studies on depression have found that childhood abuse (CA) is associated with a persistent sensitization of the hypothalamic-pituitary-adrenal (HPA)-axis to stress in adulthood. So far, it is unknown whether this HPA-axis sensitization is specific to depression, or whether this is a more general outcome associated with CA in patients with mood and anxiety disorders. The aim of this study was to investigate whether CA is associated with enhanced cortisol reactivity to psychosocial stress in Social Anxiety Disorder (SAD).

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We investigated the validity of theory driven profile interpretation of the MMPI (Hathaway & McKinley, 1943) Dutch Short Form (DSFM; Eurelings-Bontekoe, Onnink, Williams, & Snellen, 2008) as a measure of personality organization (PO) in a naturalistic follow-up study among 576 psychiatric outpatients receiving brief cognitive behavioral group therapy. Results showed that this assessment method was useful in predicting dropout as well as treatment response. Patients with a latent psychotic PO profile and a manifest low-level borderline organization profile were 3 times more likely to drop out than patients with other PO profiles.

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Objective: To investigate both concurrent and prospective relationships between daily frustration, cognitive coping and coping efficacy on the one hand and daily headache occurrence on the other.

Methods: Eighty-nine adolescents aged 13-21 completed an online daily diary for 3 weeks. Data were analyzed using multilevel modeling.

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Social anxiety and cognitive expectancy of aversive outcome in avoidance conditioning.

Behav Res Ther

October 2009

Leiden University Institute for Psychological Research, Clinical Health and Neuropsychology Unit, Leiden, The Netherlands.

Fear conditioning studies have shown that social anxiety is associated with enhanced expectancy of aversive outcome. However, the relation between cognitive expectancy and social anxiety has never been tested in avoidance conditioning paradigms. We compared 48 low (LSA) and high socially anxious individuals (HSA) on subjective expectancy of aversive outcome during an avoidance conditioning task.

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Cortisol-induced enhancement of emotional face processing in social phobia depends on symptom severity and motivational context.

Biol Psychol

May 2009

Leiden University Institute for Psychological Research, Department of Clinical, Health and Neuropsychology, Leiden University, PO-Box 9555, 2300 RB Leiden, The Netherlands.

We investigated the effects of cortisol administration on approach and avoidance tendencies in 20 patients with social anxiety disorder (SAD). Event-related brain potentials (ERPs) were measured during a reaction time task, in which patients evaluated the emotional expression of photographs of happy and angry faces by making an approaching (flexion) or avoiding (extension) arm movement. Patients showed significant avoidance tendencies for angry but not for happy faces, both in the placebo and cortisol condition.

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Hydrocortisone reduces emotional distracter interference in working memory.

Psychoneuroendocrinology

October 2009

Leiden University - Institute for Psychological Research, 2300 RB Leiden, The Netherlands.

Several studies have shown that stress and glucocorticoids can impair prefrontal-dependent working memory (WM) performance. WM is the ability to attend to the task at hand, and to maintain relevant information in mind during a delay while ignoring irrelevant stimuli. Here, it is investigated whether stress hormones impair WM by reducing the ability to suppress distracting, irrelevant neutral and emotional stimuli.

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Two experiments examine how experimentally induced differences in state self-esteem moderate emotional and behavioural responses to ambiguous and unambiguous discrimination. Study 1 (N=108) showed that participants who were exposed to ambiguous discrimination report more negative self-directed emotions when they have low compared to high self-esteem. These differences did not emerge when participants were exposed to unambiguous discrimination.

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Predicting preparatory behaviours for condom use in female undergraduate students: a one-year follow-up study.

Int J STD AIDS

March 2009

Leiden University Institute for Psychological Research, Clinical, Health and Neuropsychology, Leiden University, PO Box 9555, 2300 RB, Leiden, The Netherlands.

The objective of this study is to investigate whether the Theory of Planned Behaviour (i.e. attitude, subjective norm, perceived behavioural control and intention), fluctuations in motivation over time, and variables from the Prototype-Willingness Model (i.

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The aim of this study was to investigate the relationships between goal frustration, coping and well-being in the context of adolescent headache. Firstly, we investigated whether adolescents with weekly, monthly or no headache complaints differed with regard to the importance assigned to their personal goals, experience of goal frustration, coping with goal frustration and well-being. Secondly, the extent to which goal and coping factors contributed to well-being and whether this relationship differed according to the frequency of headache complaints was examined.

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The relation between public speaking anxiety and social anxiety: a review.

J Anxiety Disord

April 2009

Leiden University Institute for Psychological Research, Developmental Psychology Unit, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands.

This article reviewed the literature on public speaking anxiety in the context of social phobia subtyping. In total, 18 empirical studies on subtype issues related to public speaking anxiety were analyzed. Results of the reviewed studies are discussed in relation to their research method, that is, whether it focused on qualitative or quantitative aspects of subtype differences and whether it used a clinical or community sample.

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Actions travel with their objects: evidence for dynamic event files.

Psychol Res

January 2010

Leiden University Institute for Psychological Research and Leiden Institute for Brain and Cognition, Wassenaarseweg 52, 2333 AK, Leiden, The Netherlands.

Moving a visual object is known to lead to an update of its cognitive representation. Given that object representations have also been shown to include codes describing the actions they were accompanied by, we investigated whether these action codes "move" along with their object. We replicated earlier findings that repeating stimulus and action features enhances performance if other features are repeated, but attenuates performance if they alternate.

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On the neural control of social emotional behavior.

Soc Cogn Affect Neurosci

March 2009

Leiden University Institute for Psychological Research, Clinical, Health and Neuropsychology Unit, Leiden University, The Netherlands.

It is known that the orbitofrontal cortex (OFC) is crucially involved in emotion regulation. However, the specific role of the OFC in controlling the behavior evoked by these emotions, such as approach-avoidance (AA) responses, remains largely unexplored. We measured behavioral and neural responses (using fMRI) during the performance of a social task, a reaction time (RT) task where subjects approached or avoided visually presented emotional faces by pulling or pushing a joystick, respectively.

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The role of facial mimicry in the recognition of affect.

Psychol Sci

October 2008

Department of Social and Organizational Psychology, Leiden University-Institute for Psychological Research, Leiden, The Netherlands.

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Common folklore seems to suggest that adolescents are particularly susceptible to peer influence. However, from the literature the exact age differences in susceptibility to peer influence remain unclear. The current study's main focus was to chart the development of general susceptibility to peer pressure in a community sample of 10-18 year olds (N =464) with the recently developed Resistance to Peer Influence Scale (RPI).

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Background: Social avoidance and inhibition in animals is associated with hyperresponsiveness of the glucocorticoid stress-system. In humans, the relation between glucocorticoid stress-reactivity and social avoidance behavior remains largely unexplored. We investigated whether increased cortisol stress-responsiveness is linked to increased social avoidance behavior in patients with social anxiety disorder (SAD).

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Despite the assumed prevalence of risk-taking behavior in adolescence, the laboratory evidence of risk taking remains scarce, and the individual variation poorly understood. Drawing from neuroscience studies, we tested whether risk and reward orientation are influenced by the perspective that adolescents take when making risky decisions. Perspective taking was manipulated by cuing participants prior to each choice whether the decision was made for "self," or from the perspective of an "other" (the experimenter in Experiment 1; a hypothetical peer in Experiment 2).

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Intermodal event files: integrating features across vision, audition, taction, and action.

Psychol Res

September 2009

Department of Psychology, Cognitive Psychology Unit, Leiden University Institute for Psychological Research and Leiden Institute for Brain and Cognition, Leiden, The Netherlands.

Understanding how the human brain integrates features of perceived events calls for the examination of binding processes within and across different modalities and domains. Recent studies of feature-repetition effects have demonstrated interactions between shape, color, and location in the visual modality and between pitch, loudness, and location in the auditory modality: repeating one feature is beneficial if other features are also repeated, but detrimental if not. These partial-repetition costs suggest that co-occurring features are spontaneously bound into temporary event files.

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Self-generated goals and goal process appraisals: relationships with sociodemographic factors and well-being.

J Adolesc

June 2009

Leiden University Institute for Psychological Research, Clinical, Health and Neuropychology Unit, Leiden University, The Netherlands.

In this study the full array of personal goals pursued by adolescents was examined using an idiographic goal-elicitation procedure. The aims of the study were twofold. Firstly, we investigated individual differences in self-generated goals and goal process appraisals based on sociodemographic characteristics.

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How children learn from positive and negative performance feedback lies at the foundation of successful learning and is therefore of great importance for educational practice. In this study, we used functional magnetic resonance imaging (fMRI) to examine the neural developmental changes related to feedback-based learning when performing a rule search and application task. Behavioral results from three age groups (8-9, 11-13, and 18-25 years of age) demonstrated that, compared with adults, 8- to 9-year-old children performed disproportionally more inaccurately after receiving negative feedback relative to positive feedback.

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On Similarity Coefficients for 2x2 Tables and Correction for Chance.

Psychometrika

September 2008

Psychometrics and Research Methodology Group, Leiden University Institute for Psychological Research, Leiden University, Wassenaarseweg 52, P.O. Box 9555, 2300 RB Leiden, The Netherlands.

This paper studies correction for chance in coefficients that are linear functions of the observed proportion of agreement. The paper unifies and extends various results on correction for chance in the literature. A specific class of coefficients is used to illustrate the results derived in this paper.

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People typically respond faster to a stimulus when it is accompanied by a task-irrelevant accessory stimulus presented in another perceptual modality. However, the mechanisms responsible for this accessory-stimulus effect are still poorly understood. We examined the effects of auditory accessory stimulation on the processing of visual stimuli using scalp electrophysiology (Experiment 1) and a diffusion model analysis (Experiment 2).

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The importance of self-regulatory and goal-conflicting processes in the avoidance of drunk driving among Greek young drivers.

Accid Anal Prev

May 2008

Leiden University - Institute for Psychological Research, Department of Clinical, Health and Neuropsychology, Leiden University, The Netherlands.

The present study examined self-regulatory and goal-conflicting processes in the avoidance of drunk driving among Greek young drivers. A total of 361 university students in Greece completed a questionnaire, using a retrospective cross-sectional survey design. One-third reported to have driven under the influence of alcohol.

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Interpretation bias and social anxiety in adolescents.

J Anxiety Disord

December 2008

Leiden University Institute for Psychological Research, Developmental Psychology Unit, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands.

Interpretation bias, described as the tendency to interpret social situations in a negative or threatening manner, has been widely linked to social anxiety in adult populations. This study aimed to extend research on interpretation bias to an adolescent population. Thirty-seven high socially anxious and a control group of 36 non-socially anxious adolescents rated the likelihood of different interpretations of ambiguous social and non-social situations coming to mind and which interpretation they most believed.

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A crucial element of testing hypotheses about rules for behavior is the use of performance feedback. In this study, we used fMRI and EEG to test the role of medial prefrontal cortex (PFC) and dorsolateral (DL) PFC in hypothesis testing using a modified intradimensional/extradimensional rule shift task. Eighteen adults were asked to infer rules about color or shape on the basis of positive and negative feedback in sets of two trials.

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Do parents reinforce somatic complaints in their children?

Health Psychol

March 2008

Leiden University-Institute for Psychological Research, Developmental Psychology, Leiden.

Objective: To examine the influence of parental solicitousness on self-reported somatic complaints in school-age children.

Design And Main Outcome Measures: Participants were 564 children (mean age 10 years) and their parents. Children completed self-report measures of somatic complaints, parental solicitousness, depressiveness, fear, and sense of coherence.

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