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Biomedical subjects

P J Prins

Publications and source records attributed to P J Prins.

17 recordsLinked to original sources
PubMed1999

Coping self-talk and cognitive interference in anxious children.

The present study addressed the as-yet-unresolved issue of whether coping self-talk facilitates or interferes with effective task performance. Tests of the relationship between coping cognition and task performance are reported when potentially confounding relationships of negative cognition and task performance are controlled. The results indicate that coping self-talk of high-anxious children was positively correlated with negative thoughts but did not contribute significantly to performance. Implications for the functional value of coping self-talk are discussed.

Achievement↗
PubMed1999

Behavioural and emotional problems in children referred to a centre for special dental care.

This study was conducted among 203 children (103 boys) referred to a centre for special dental care because of a high level of dental fear. It was undertaken to explore to what extent behavioural and emotional problems co-exist in these children compared with children of a Dutch norm group. The children's parents filled out the parental version of the Child Behaviour Checklist (CBCL), before their first appointment at the centre. The behavioural and emotional problems of the children were assessed by this CBCL, and the mean scores of the children in the study were compared with the mean scores of the norm group. The mean scores on all scales, except on the subscale 'sex problems', of the children with a high level of dental fear proved to be significantly higher than the mean scores of the norm group (P< or =0.001). The results indicated that children referred to a special dental care centre not only suffer from high dental fear but also have problems in several other behavioural and emotional areas. These problems appear to be heterogeneous; they were found in several specific problem areas, both external and internal.

Behavioral Symptoms↗
PubMed1999

Cough as the ambiguous indicator of airway obstruction in asthma.

This study tested the hypothesis that cough frequency during induced airway obstruction in children and adolescents with asthma relates significantly to other symptoms. The second hypothesis was that cough during remission may often be a conditioned or voluntary response. In experiment 1, tracheal sounds were recorded from 30 participants with asthma during a histamine challenge test. In experiment 2, tracheal sounds were recorded from 30 participants with and 30 without asthma during a standardized physical exercise task. Cough and respiratory wheeze were assessed from the sound records by two examiners independently. The results showed that cough during airway obstruction did not relate to other variables. Only the second hypothesis was supported. In both experiments the frequency of cough was independent of lung function (forced expiratory volume in 1 sec [FEV1]), wheezing, dyspnea, and severity of asthma. The percentage of participants with asthma who coughed in experiment 1 increased from 21% (baseline) to 71% after histamine inhalation. During experiment 2, the cough percentage increased from 52% to 69% in asthmatics, and from zero to 57% in controls. It was concluded that cough in asthma is not diagnostically useful for assessment of airway obstruction. Excessive baseline cough among asthmatics could be the result of acquired responses to anticipated exercise-induced symptoms.

Adolescent↗
PubMed1999

[Children with ADHD].

An ever increasing number of hyperactive and impulsive children receive the diagnosis Attention-Deficit Hyperactivity Disorder (ADHD). The relatively high prevalence, negative prognosis, and assumed inheritable nature of this behavioral disorder make ADHD one of the most prominent child diagnoses to date. This article discusses the behavioral characteristics, etiology, diagnostics and treatment of ADHD in school-age children. Finally, some suggestions for managing ADHD in the dental practice are given.

Attention Deficit Disorder with Hyperactivity↗
PubMed1998

The relationship between negative emotions and acute subjective and objective symptoms of childhood asthma.

BACKGROUND: Children with asthma are vulnerable to negative emotions, but clinical observations and research suggest that negative emotions can also be precipitants of asthma attacks. Empirical data provided mixed results. The hypothesis was tested that negative emotions influence subjective rather than objective symptoms of asthma, breathlessness and airways obstruction, respectively. METHODS: Forty asthmatic children (aged 7 to 18 years) were randomly assigned to one of four experimental conditions: 1, viewing an emotional film of 10 min; 2, performing standardized physical exercise of modest intensity up to a heartbeat of 170 b/min; 3, combination of conditions, order conditions, 1 + 2; and 4, combination of conditions, order conditions 2 + 1. Lung function, breathlessness and state anxiety were measured pre-test and post-test. Respiration sounds were recorded continuously for assessment of emotional breathing patterns. RESULTS: The data and responses to exit questions, confirmed a successful induction of anxiety via increased state anxiety and respiratory rate. Viewing the emotional film did not by itself enhance airways obstruction or breathlessness. Airways obstruction and breathlessness increased significantly after exercise only. Significantly more breathlessness was reported when negative emotions preceded exercise. Breathlessness was statistically independent of lung function, severity of asthma, symptoms in the past 4 weeks, anxiety or age. CONCLUSION: Negative emotions affect subjective, rather than objective symptoms of childhood asthma. It was suggested that children in a negative emotional state, uncertain about the condition of their airways, are inclined to interpret exercise-related general sensations (fatigue, heart pounding, sighing) in line with expectations as symptoms of airways obstruction. Consequently, they may report relatively high breathlessness, irrespective of actual objective symptoms of asthma.

Adolescent↗
PubMed1998

The Dental Subscale of the Children's Fear Survey Schedule: a factor analytic study in The Netherlands.

The Dental Subscale of the Children's Fear Survey Schedule (CFSS-DS) is a well-known instrument for assessing dental fear in children. Previous studies have shown that the scale has acceptable reliability and validity. Factor analysis using scores of a group of Finnish schoolchildren resulted in three factors. No other data on the factor structure have been published. In order to report on the factor structure of the Dutch parental version of the CFSS-DS, the present study was undertaken. Factor analysis using scores from a group of Dutch children (n= 150) demonstrated a factor pattern fairly similar to the results found in the Finnish study. Three factors were found: 1) fear of highly invasive dental procedures, 2) fear of less invasive aspects of treatment and 3) fear of medical aspects. Considering that almost all items load substantially (> or =0.20) on more than one factor, it seems that one primary underlying dimension exists: fear of invasive treatment aspects. The CFSS-DS is proposed as a reliable, one-dimensional measure of dental fear.

Child↗
PubMed1997

Self-statements of test-anxious children: thought-listing and questionnaire approaches.

Two methods of assessing cognition in high, moderate, and low test-anxious children, thought listing and self-statement questionnaire approaches, were investigated under naturalistic test-taking conditions. The amount of cognition, its content, and its relation to level of anxiety and task performance were examined. States of mind (SOM) analyses were performed. Furthermore, the comparability of findings from both methods was examined. Results showed that, relative to the questionnaire method, the thought-listing procedure underestimated positive and coping cognition. The benefits of the questionnaire approach were seen in the power of its scores to predict task performance. Implications for cognitive assessment and treatment of anxious children are discussed.

Anxiety↗
PubMed1997

The influence of respiratory sounds on breathlessness in children with asthma: a symptom-perception approach.

The discordance between the objective and subjective symptoms of asthma has major effects on proper medication and management. In 2 studies the influence of respiratory sounds in the process of symptom perception underlying breathlessness was investigated in children aged 7-17 years. In Experiment 1, asthmatic wheezing sounds were recorded in 16 children during histamine-induced airway obstruction. Breathlessness correlated significantly with rank order of amount of wheezing, but not with lung function. In Experiment 2, after standardized physical exercise, 45 asthmatic and 45 nonasthmatic children were randomly assigned to (a) false feedback of wheezing, (b) quiet respiratory sounds, or (c) no sound. Asthmatic children reported significantly more breathlessness in the 1st versus the 3rd condition. In conclusion, many asthmatic children were easily influenced by wheezing in their estimation of asthma severity, reflected in breathlessness.

Adolescent↗
PubMed1996

The influence of lung function information on self-reports of dyspnea by children with asthma.

Studied the influence of actual and false peak flow (PEF) information on dyspnea (breathlessness) in two experiments, each with 30 children with and 30 without asthma (7-17 years). Dyspnea, PEF, and lung function were measured before and after standardized physical exercise. Dyspnea was measured with a visual analog scale. PEF was measured with a peak flow meter and used for manipulation of dyspnea. The first experiment showed that the relationship between dyspnea and lung function was not stronger when children had knowledge of PEF values. The second experiment revealed that asthmatic children who received false feedback of 30% below the actual PEF reported significantly more dyspnea. Implications for the management of asthma are discussed.

Adolescent↗
PubMed1996

The capacity of children with and without asthma to detect external resistive loads on breathing.

Clinical observations and research with adults consistently showed that subjective symptoms of asthma poorly reflect actual airway obstruction. The lack of accurate symptom perception poses a problem for medication and management of asthma. The accuracy of airflow detection was studied in 46 children with and 46 without asthma (aged 7-18 years). They breathed through a facemask and responded to load stimuli of different intensity. Sessions consisted of 10 blocks of 5 min, each with 10 stimuli presented. Experiment 1: Loads of increasing intensity presented to 36 children with and 36 without asthma. Seven asthmatics had a reliable detection threshold (just noticeable difference, jnd) analogous to approximately equal to 64% fall in forced expiratory volume in 1 sec (FEV1). Ten normal controls had a jnd of approximately 39% fall. Experiment 2: Loads randomly presented to 10 children with and 10 without asthma. Four asthmatics had a jnd of approximately equal to 64% fall in FEV1. Six normal controls had a jnd of approximately equal to 39% fall. The results demonstrated that children generally were poorly perceiving load stimuli and that asthmatics were less accurate.

Adolescent↗
PubMed1995

Characteristics of wheeze during histamine-induced airways obstruction in children with asthma.

BACKGROUND: An automated system has been developed for the detection of sound patterns suggestive of airways obstruction in long term recordings. The first step, presented here, was tracheal sound recording during histamine-induced airways obstruction. METHODS: The tracheal sounds of 29 children aged 8-19 years with asthma were recorded during airways obstruction caused by histamine inhalation using a system for continuous respiratory telemetry and computer analysis. Sound patterns were analysed, classified, and related to airways obstruction measured by lung function tests based on the forced expiratory volume in one second (FEV1). RESULTS: Five sound patterns were identified, one dominant sensitive and four specific to a fall in FEV1 of > 20%. The presence of at least one of three specific sound patterns during unforced respiration predicted a fall in FEV1 of > 20% in 87.5% of the subjects. The inspiratory and expiratory sound patterns were almost equally informative of airways obstruction. CONCLUSIONS: Wheezes can be differentiated with more precision than is currently accepted. Tracheal sound patterns are sensitive and specific predictors of histamine-induced airways obstruction. These patterns are neither invariably nor proportionally related to the results of lung function testing. However, they can be used for detection of airways obstruction on the basis of their presence or absence.

Adolescent↗
PubMed1994

Cognition in test-anxious children: the role of on-task and coping cognition reconsidered.

This study investigated cognition in children with high, moderate, and low test anxiety under naturalistic test-taking conditions. Children with high test anxiety not only reported more negative self-evaluations and more off-task thoughts but also more on-task and coping thoughts. Consistent with previous research, no "task-facilitating" role for these on-task and coping cognitions was found. This finding lends support to the notion of "the power of non-negative thinking". The only facilitating role was for positive self-evaluations. It was hypothesized that positive cognition could be task-facilitating under certain conditions. Limited support was found for this idea.

Adaptation, Psychological↗
PubMedDate not supplied

Parental beliefs on the origins of child dental fear in The Netherlands.

The aim of this study was to assess parental beliefs on the causes and prevention of child dental fear in the Netherlands. The parents of 123 children (67 high fearful and 56 low fearful children) were interviewed about the causes of their children's dental fears, and about factors contributing to the prevention of this fear. Parents attributed their child's dental fear to the following factors: invasive dental experiences (37 percent), medical problems (19 percent), child's temperament (16 percent), negative dentist behavior (13 percent) and social influences (5 percent). In the prevention of child dental fear, an empathetic dentist (34 percent) and parental guidance (30 percent) were mentioned most frequently. In conclusion, conditioning factors were reported to be highly important in the development of child dental fear. Some of the parents, however, indicated temperamental factors to have played a role, suggesting that subgroups of dentally fearful children exist. These temperamental or psychological factors seem also to contribute substantially to the development of dental fear. Possible differences in parental attributional style are discussed.

Age Factors↗