Bert Bakker

Dynamics of the plasma concentrations of TSH, FT4 and T3 following thyroxine supplementation in congenital hypothyroidism.

objective The dynamics of the plasma concentrations of various diagnostic determinants of thyroid function were analysed in children with congenital hypothyroidism (CH) after the start of T4 supplementation. The description of the biochemical dynamics of TSH and free T4 (FT4) during the first period of thyroxine treatment is important to depict the practical outlines of the initial dosage of T4 and dosage adjustments for newborns with variable forms of CH.

The psychological roots of populist voting: Evidence from the United States, the Netherlands and Germany

What are the psychological roots of support for populist parties or outfits such as the Tea Party, the Dutch Party for Freedom or Germanys Left Party? Populist parties have as a common denominator that they employ an anti-establishment message, which they combine with some ‘host’ ideology. Building on the congruency model of political preference, it is to be expected that a voters personality should match with the message and position of his or her party. This article theorises that a low score on the personality trait Agreeableness matches the anti-establishment message and should predict voting for populist parties. Evidence is found for this hypothesis in the United States, the Netherlands and Germany. The relationship between low Agreeableness and voting for populist parties is robust, controlling for other personality traits, authoritarianism, sociodemographic characteristics and ideology. Thus, explanations of the success of populism should take personality traits into account.

Personality and European Union attitudes: Relationships across European Union attitude dimensions

We still do not fully understand why attitudes toward the European Union differ among citizens. In this study, we turn to the Big Five personality traits: Openness, Conscientiousness, Extraversion, Agreeableness and Neuroticism as antecedents of European Union attitudes. In a national survey, we focus on attitudes toward widening and deepening of the European Union, trust in European Union institutions, identification with the European Union and negative affect experienced toward the European Union. We theorize that the Big Five traits are heterogeneously associated with the different European Union attitudes. We confirm that the Big Five traits are indeed associated with some but not all European Union attitudes. Accordingly, personality is expected to shape how citizens’ respond to changes in the institutional set-up of the European Union.

Personality traits and party identification over time

Why do some people stably identify with a party while others do not? This study tests whether and how the direction, stability and strength of party identification are associated with big five personality traits, using panel data from a representative sample of German citizens. First, the study confirms that personality traits are related to identification with different political parties. Second, it moves beyond previous research by showing that personality traits are related to the strength and variation in party identification over time. The implications of the study for the classical perspectives on party identification, as well as the personality and politics literature, are discussed.

Selling Ourselves Short? How Abbreviated Measures of Personality Change the Way We Think about Personality and Politics

Political scientists who study the interplay between personality and politics overwhelmingly rely on short personality scales. We explore whether the length of the employed personality scales affects the criterion validity of the scales. We show that need for cognition (NfC) increases reliance on party cues, but only when a longer measure is employed. Additionally, while NfC increases reliance on policy information, the effect is more than twice as large when a longer measure is used. Finally, Big Five personality traits that have been dismissed as irrelevant to political ideology yield stronger and more consistent associations when larger batteries are employed. We also show that using high Cronbach’s alpha and factor loadings as indicators of scale quality does not improve the criterion validity of brief measures. Hence, the measurement of personality conditions the conclusions we draw about the role of personality in politics.