Meta-analysis of psychotherapies usually report effects sizes. For patients and clinicians, however, it is important to know what the chances are of getting better after a treatment. The SMD is not very informative in this respect and cannot be see as an indicator of clinical relevance, because it is still a statistical concept. For patients and clinicians it is important to simply now the proportions of patients who get better when they receive treatment and...

Course site for A Decolonized Approach to Scholarly Communication: Foundations, Challenges, and Perspectives in Practice and Research

The current study uses a conjoint analyses to asses how individual differences(e.g., disgust sensitivity, vaccine knowledge, trust in science) and vaccine properties themselelves(e.g., vaccine technology, rate of side effects, and efficacy) influence preferences for vaccines among Chinese and Dutch individuals.

Children are a source of happiness, but they can also cause a lot of stress for parents (Nelson et al., 2014). Parenting stress can be understood through a broader set of theories that describe the interplay between stressors, resources and individual factors (e.g., Hill, 1949; Kemeny, 2003; Lin & Ensel, 1989). One of these theories is the double ABCX model of adjustment and adaptation (McCubbin & Patterson, 1983) that is based on the family stress...

According to the self-expansion model, people are motivated to acquire new resources and experiences, relationships are one good source for this process (Aron, Lewandowski, Mashek, & Aron, 2013) However, when the expansion period decelerates, relational boredom would occur (Aron & Aron, 1986) but little is known about the influence of relational boredom on close relationships. In this study, we intend to clarify the link between relational boredom and personal well-being. In addition, we will manipulate...

More than 320 million people suffer from depression worldwide1. The enormous treatment gap calls for innovative solutions in the delivery of mental-health care. In low-resource settings, a “task-shifting” approach may be beneficial in using human resources more efficiently2. Task shifting is the strategy of delegating care tasks to health workers who have fewer qualifications and shorter training than mental healthcare experts (e.g., psychiatrists, clinical psychologists or nurses)3. Nevertheless, relatively little is known about individual patient...

This document details the harmonization method for evaluating internalizing and externalizing behavior outcomes in the pre-registered individual participant data (IPD) meta-analysis on the attachment network to multiple caregivers (https://osf.io/a3qs9).

Research on response and remission rates in control condition of psychotherapies is scarce, with most reviews including only a small number of studies and mixing different types of research. Research on this subject is, however, important for several reasons. First, it can give indications for the response and remission rates of ‘usual care’, because this is one of the most important control conditions in psychotherapy trials, and thus give a benchmark for what usual care...

Depression during pregnancy and after the birth of a child is highly prevalent and results in a considerable reduction in quality of life, social functioning (Drury et al., 2016), maternal functioning (O’Hara & McCabe, 2013). It can also have severe consequences in children, including poor cognitive, emotional, behavioral, and physical outcomes (Goodman et al., 2011; O’Hara & McCabe, 2013). Although several meta-analyses have examined the effects of psychological treatments of perinatal depression, they have all...

This project concerns a scenario study whereparticipants are asked to imagine a situation in which they receive gossip from a friend about an acquaintance of their friend, who they do not know. The gossip varies on two dimensions in 3x3 full-factorial design. First, the gossip describes the acquaintance as either having recovered from infection with the Coronavirus, as currently infected (symptomatic) with the Coronavirus, or provides no information on infection with the Coronavirus. Secondly, the...

Background. The number of trials on psychotherapies for adult depression is very large and is quickly growing. Because of this large body of knowledge, it is important that the results of these studies are summarized and integrated in meta-analytic studies. More than a decade ago we developed a meta-analytic database of these trials, which was updated yearly through systematic literature searches. Recently, we developed a new version of this meta-analytic database, built on the systems...

Suicidal ideation and behavior are a major mental health problem worldwide. Many individuals at risk of suicide do not receive treatment. In recent years, low-threshold internet- and mobile-based interventions for suicidality have been developed. Current meta-analyses suggest that they might reduce suicidal ideation. However, they found small effect sizes and it remains unclear whether specific subgroups experience beneficial or harmful effects. Therefore, we will conduct an individual patient data meta-analysis (IPD-MA) to establish the effectiveness...

Autism is a heterogeneous condition and treatment options vary. This study will investigate whether differing characteristics/profiles of children with autism are linked to diversity in treatment choice. Research suggests that the factors that influence parents’ decision-making about treatment change over time, starting when the child is first diagnosed (Edwards et al., 2018). The use of most treatments decrease with age, while psychotropic medication increases with age (Mire et al., 2015). Children with more severe autism...

Chronic depression and treatment-resistant depression are highly important from a clinical perspective. Despite this clinical relevance, relatively few trials have examined the effects of psychological interventions and only a limited number of meta-analyses of these trials have been conducted. No recent meta-analysis has focused on the effects of psychotherapies for chronic and treatment-resistant depression compared with control conditions (care-as-usual, waitlist, pill placebo, others). We decided to conduct a new meta-analysis of psychotherapies for chronic and...

This systematic review aims to summarise the physical demands of tennis across the different court types, performance level and sex of the players, by reviewing the scientific information on this topic and synthesising the data currently available using a meta-analysis.

Ever since Main et al. (1985)’s discovery that parents’ attachment representations are associated with parent-child attachment, the intergenerational transmission of attachment has intrigued researchers across the globe. Research has focused on sensitive caregiver behavior as the mediating mechanism through which a parent’s attachment state of mind expresses itself leading to child-parent attachment, but meta-analytic evidence showed that sensitive responsiveness explained only 25% of the intergenerational association (Van IJzendoorn, 1995; Verhage et al., 2016). Solving this...

A pre-registration for a project in which we will study the influence of individual differences in IQ on individual differences in psychopathology, in a genetically informative design.

The World Health Organization (WHO) developed several scalable psychological interventions delivered by trained and supervised non-specialists to reduce psychological distress in communities affected by adversity (Dawson et al., 2015). These interventions are potentially cost-effective solutions for settings where access to mental health services is low. Examples of such interventions are Problem Management Plus (PM+) and Step-by-Step (SbS). Prior research on PM+ in violence-affected settings in Kenya and Pakistan showed that the intervention is related to...

Background. The number of trials on psychotherapies for adult depression is very large and is quickly growing. Because of this large body of knowledge, it is important that the results of these studies are summarized and integrated in meta-analytic studies. More than a decade ago we developed a meta-analytic database of these trials, which was updated yearly through systematic literature searches. Recently, we developed a new version of this meta-analytic database, built on the systems...

We are conducting this study to examine how social experiences in dyadic interaction facilitate further cooperation in groups. More specifically, this study aims to investigate how the interaction between two partners in a repeated prisoners dilemma predicts their cooperation in a later public goods game with three more participants. The research question that drives our study is does cooperative experience in dyadic interaction facilitates cooperation in groups if you “bring your partner”?

Mental disorders are common in college students, yet students who need mental health support usually do not utilize mental health services (Auerbach et al., 2018). Although evidence-based psychological interventions can be effective in college students, only a small proportion of students with mental disorders are seeking help from mental health professionals (Ebert et al., 2019; Eisenberg, Hunt, & Speer, 2012). Several studies have been conducted to understand the help-seeking behaviors of college students, barriers, and...