Peter Muris

The Strengths and Difficulties Questionnaire (SDQ) Further evidence for its reliability and validity in a community sample of Dutch children and adolescents

Abstract. This study was a first attempt to examine the psychometric properties of the Strengths and Difficulties Questionnaire (SDQ) in Dutch youths. A large sample of normal children and adolescents (N = 562) and their parents completed the SDQ along with a number of other psychopathology measures. Factor analysis of the SDQ yielded five factors that were in keeping with the hypothesised subscales of hyperactivity-inattention, emotional symptoms, peer problems, conduct problems, and prosocial behaviour. Furthermore, internal consistency, test-retest stability, and parent-youth agreement of the various SDQ scales were acceptable. Finally, the concurrent validity of the SDQ was good: that is, its scores correlated in a theoretically meaningful way with other measures of psychopathology. It can be concluded that the psychometric properties of the parent- and self-report version of the SDQ were satisfactory in this Dutch community sample. Moreover, the current data provide further support for the utility of the SDQ as an index of psychopathological symptoms in youths.

Three traditional and three new childhood anxiety questionnaires: Their reliability and validity in a normal adolescent sample.

The current study examined the psychometrics of three traditional [i.e., the trait anxiety version of the State-Trait Anxiety Inventory for Children (STAIC), the Revised Childrens Manifest Anxiety Scale (RCMAS), and the Fear Survey Schedule for Children - Revised (FSSC-R)] and three new childhood anxiety scales [the Multidimensional Anxiety Scale for Children (MASC), the Screen for Child Anxiety Related Emotional Disorders (SCARED), and the Spence Childrens Anxiety Scale (SCAS)] in a large sample of normal adolescents (N=521). Childhood anxiety scales were generally found to be reliable in terms of internal consistency. Furthermore, evidence was obtained for the convergent and divergent validity of the various anxiety questionnaires. That is, anxiety questionnaire scores were found to be substantially intercorrelated. Particularly strong associations were found between total scores of the STAIC and the RCMAS, total scores of the SCARED and the SCAS, and between subscales that intend to measure specific categories of anxiety symptoms. Childhood anxiety questionnaires were substantially connected to an index of depression, although correlations among anxiety questionnaires were generally higher than those between anxiety scales and a measure of depression.

Comorbid anxiety symptoms in children with pervasive developmental disorders.

The present study examined the prevalence of comorbid anxiety symptoms in 44 children with pervasive developmental disorders. Parents of the children were interviewed using the Anxiety Disorders section of the Diagnostic Interview Schedule for Children. Results indicated that severe anxiety symptoms are highly prevalent in children with pervasive developmental disorders: 84.1% of the children met the full criteria for at least one anxiety disorder. Furthermore, 72.7% of the children displayed ritualistic behaviors. Implications of the findings are discussed.

A Brief Questionnaire for Measuring Self-Efficacy in Youths

The current study examined the reliability and validity of the Self-Efficacy Questionnaire for Children (SEQ-C) in a sample of young adolescents (N = 330). Factor analysis of the SEQ-C revealed three factors that were in keeping with the intended subscales: social self-efficacy, academic self-efficacy, and emotional self-efficacy. Furthermore, results showed that the SEQ-C has satisfactory internal consistency. Finally, SEQ-C scores correlated in a theoretically meaningful way with a measure of depression. That is, the lower childrens SEQ-C scores, the higher their level of depression. Possible applications of the SEQ-C are briefly discussed.

Relationships between self-efficacy and symptoms of anxiety disorders and depression in a normal adolescent sample

Abstract The present study examined relationships between self-efficacy and symptoms of affective disorders in a large sample of normal adolescents ( n =596). Participants completed the Self-Efficacy Questionnaire for Children and scales measuring trait anxiety/neuroticism, and symptoms of anxiety disorders and depression. Results showed that low levels of self-efficacy generally were accompanied by high levels of trait anxiety/neuroticism, anxiety disorders symptoms, and depressive symptoms. Furthermore, some support was found for the notion that specific domains of self-efficacy are especially associated with particular types of anxiety problems. That is, social self-efficacy was most strongly connected to social phobia, academic self-efficacy to school phobia, and emotional self-efficacy to generalised anxiety and panic/somatic. Finally, when controlling for trait anxiety/neuroticism, self-efficacy still accounted for a small but significant proportion of the variance of symptoms of anxiety disorders and depression. The role of self-efficacy in the aetiology and maintenance of childhood affective disorders and directions for future research are briefly discussed.

Differences in attention to food and food intake between overweight/obese and normal-weight females under conditions of hunger and satiety.

Starting from an addiction model of obesity, the present study examined differences in attention for food-related stimuli and food intake between overweight/obese and normal-weight women under conditions of hunger and satiety. Twenty-six overweight/obese (BMI: 30.00+/-4.62) and 40 normal-weight (BMI: 20.63+/-1.14) females were randomly assigned to a condition of hunger or satiety. Three indexes of attention were employed, all including pictures of food items: an eye-tracking paradigm (gaze direction and duration), a visual probe task (reaction times), and a recording of electrophysiological brain activity (amplitude of the P300 event-related potential). In addition, the acute food intake of participants was assessed using a bogus taste task. In general, an attentional bias towards food pictures was found in all participants. No differences between groups or conditions were observed in the eye-tracking data. The visual probe task revealed an enhanced automatic orientation towards food cues in hungry versus satiated, and in overweight/obese versus normal-weight individuals, but no differences between groups or conditions in maintained attention. The P300 amplitude showed that only in normal-weight participants the intentional allocation of attention to food pictures was enhanced in hunger versus satiety. In hungry overweight/obese participants, the P300 bias for food pictures was not clearly present, although an increased food intake was observed especially in this group. In conclusion, various attention-related tasks yielded various results, suggesting that they measure different underlying processes. Strikingly, overweight/obese individuals appear to automatically direct their attention to food-related stimuli, to a greater extent than normal-weight individuals, particularly when food-deprived. Speculatively, hungry overweight/obese individuals also appear to use cognitive strategies to reduce a maintained attentional bias for food stimuli, perhaps in an attempt to prevent disinhibited food intake. However, in order to draw firm conclusions, replication studies are needed.

Individual differences in thought suppression. The white bear suppression inventory: Factor structure, reliability, validity and correlates

The White Bear Suppression Inventory [WBSI; Wegner, D.M. & Zanakos, S. (1994), Journal of Personality, 62, 615-640] is a self-report questionnaire measuring peoples general tendency to suppress unwanted negative thoughts. The current article describes two studies investigating the reliability, factor structure, validity, and correlates of the WBSI. Study 1 (n = 172) showed that the WBSI is a reliable instrument in terms of internal consistency and test-retest stability. Factor analyses of the WBSI revealed a 1-factor solution. Furthermore, the WBSI was found to correlate positively with measures of emotional vulnerability and psychopathological symptoms. In Study 2 (n = 40), the relationship between WBSI and levels of intrusive thinking was examined in more detail, using a thought suppression task. In general, results of this thought suppression experiment provided evidence for the validity of the WBSI. That is, subjects with high WBSI scores exhibited higher frequencies of unwanted intrusive thoughts than subjects with low WBSI scores.

Fears, Worries, and Scary Dreams in 4- to 12-Year-Old Children:Their Content, Developmental Pattern, and Origins

Investigated anxiety symptoms in normal school children 4 to 12 years of age (N = 190). The percentages of children reporting fears, worries, and scary dreams were 75.8, 67.4, and 80.5%, respectively, indicating that these anxiety symptoms are quite common among children. Inspection of the developmental pattern of these phenomena revealed that fears and scary dreams were common among 4- to 6-year-olds, became even more prominent in 7- to 9-year-olds, and then decreased in frequency in 10- to 12-year-olds. The developmental course of worry deviated from this pattern. This phenomenon was clearly more prevalent in older children (i.e., 7- to 12-year-olds) than in younger children. Furthermore, although the frequency of certain types of fears, worries, and dreams were found to change across age groups (e.g., the prevalence of fears and scary dreams pertaining to imaginary creatures decreased with age, whereas worry about test performance increased with age), the top intense fears, worries, and scary dreams remained relatively unchanged across age levels. An examination of the origins of these common anxiety phenomena showed that for fears and scary dreams, information was the most commonly reported pathway, whereas for worry, conditioning experiences were more prominent.

The Creative Experiences Questionnaire (CEQ): a brief self-report measure of fantasy proneness

The current article describes the psychometric qualities of the Creative Experiences Questionnaire (CEQ), a brief 25-item self-report measure of fantasy proneness. Findings indicate that the CEQ demonstrates adequate test-retest stability and internal consistency. CEQ scores appear not to be related to social desirability. The CEQ was found to be strongly correlated with a concurrent measure of fantasy proneness. Furthermore, there are substantial correlations between the CEQ and standard measures of absorption, schizotypy, and dissociation. Bearing in mind that these constructs are thought to be intimately linked to fantasy proneness, this pattern of correlations supports the validity of the CEQ. The CEQ might be fruitfully used as a brief research scale in several domains (e.g. studies on pseudomemories).

Individual differences in reward sensitivity are related to food craving and relative body weight in healthy women

According to the theory of J.A. Gray, a strongly reactive approach system is highly sensitive to reward or to cues that signal reward. This implies that intake driven by the rewarding properties of food should be affected by individual differences in reactivity of the approach system. The present study examined whether reward sensitivity is associated with food craving and relative body weight in a sample of female college students. Participants completed the Sensitivity to Punishment and Sensitivity to Reward Questionnaire and the trait version of the Food Craving Questionnaire and also reported their weight and height in order to compute Body Mass Index (BMI). Sensitivity to reward was significantly related to food craving and BMI. Furthermore, the correlation between reward sensitivity and BMI was not attenuated when the influence of food craving was partialled out, indicating that the relation between sensitivity to reward and BMI was not mediated by food craving. This is the first study demonstrating a relation between the personality trait of sensitivity to reward and BMI. These findings are discussed in the context of the involvement of dopaminergic reward circuitry in overeating.