PubMed Health⌕ Search

Biomedical subjects

A A Williams

Publications and source records attributed to A A Williams.

13 recordsLinked to original sources
PubMed2001

The changing signs in the relationships among self-efficacy, personal goals, and performance.

The common interpretation of the positive correlation among self-efficacy, personal goals, and performance is questioned. Using self-efficacy theory (A. Bandura, 1977), it was predicted that cross-sectional correlational results were a function of past performance's influence on self-efficacy, and using control theory (W. T. Powers, 1973), it was predicted that self-efficacy could negatively influence subsequent performance. These predictions were supported with 56 undergraduate participants, using a within-person procedure. Personal goals were also positively influenced by self-efficacy and performance but negatively related to subsequent performance. A 2nd study involving 185 undergraduates found that manipulated goal level positively predicted performance and self-efficacy positively predicted performance in the difficult-goal condition. The discussion focuses on conditions likely to affect the sign of the relationship among self-efficacy, goals, and performance.

Adolescent↗
PubMed2000

Biparental failure in the childhood experiences of borderline patients.

The purpose of this study was to assess the role of biparental abuse and neglect in the development of borderline personality disorder (BPD). A semistructured research interview was used to blindly assess the childhood experiences of biparental abuse and neglect reported by 358 borderline inpatients and 109 axis II controls. Eighty-four percent of borderline patients reported having experienced some type of biparental abuse or neglect before the age of 18; 55% reported a childhood history of biparental abuse; 77% reported a childhood history of biparental neglect. These experiences were also reported by a substantial percentage of Axis II controls (biparental abuse or neglect [61%], biparental abuse [31%], and biparental neglect [55%]). However, borderline patients were significantly more likely than axis II controls to report having been verbally, emotionally, and physically but not sexually abused by caretakers of both sexes. They were also significantly more likely than controls to report having caretakers of both sexes deny the validity of their thoughts and feelings, fail to provide them with needed protection, neglect their physical care, withdraw from them emotionally, and treat them inconsistently. It was also found that female borderlines who reported a previous history of neglect by a female caretaker and abuse by a male caretaker were at significantly higher risk for having been sexually abused by a noncaretaker. Taken together, the results of this study suggest that biparental failure may be a significant factor in the etiology of BPD. They also suggest that biparental failure may significantly increase a preborderline girl's risk of being sexually abused by someone other than her parents.

Adult↗
PubMed1997

Reported pathological childhood experiences associated with the development of borderline personality disorder.

OBJECTIVE: The purpose of this study was to assess a full range of pathological childhood experiences reported by patients with criteria-defined borderline personality disorder and comparison patients with other personality disorders. METHOD: The pathological childhood experiences reported by 467 inpatients with personality disorders were assessed by interviewers who used a semistructured research interview and were blind to clinical diagnosis. RESULTS: Of the 358 patients with borderline personality disorder, 91% reported having been abused, and 92% reported having been neglected, before the age of 18. The borderline patients were significantly more likely than the 109 patients with other personality disorders to report having been emotionally and physically abused by a caretaker and sexually abused by a noncaretaker. They were also significantly more likely to report having a caretaker withdraw from them emotionally, treat them inconsistently, deny their thoughts and feelings, place them in the role of a parent, and fail to provide them with needed protection. The borderline patients with a childhood history of sexual abuse were significantly more likely than those without such a history to report having experienced all but one of the types of abuse and neglect studied. When all significant risk factors were considered together, four were found to be significant predictors of a borderline diagnosis: female gender, sexual abuse by a male noncaretaker, emotional denial by a male caretaker, and inconsistent treatment by a female caretaker. CONCLUSIONS: The results suggest that sexual abuse is neither necessary nor sufficient for the development of borderline personality disorder and that other childhood experiences, particularly neglect by caretakers of both genders, represent significant risk factors.

Adolescent↗
PubMed1997

Childhood antecedents of self-destructiveness in borderline personality disorder.

OBJECTIVE: To assess the relationship between lifetime patterns of self-destructive behaviour and various parameters of childhood abuse and neglect in patients with borderline personality disorder (BPD) compared with other personality disorder (OPD) controls. METHOD: The subjects were 42 inpatients with the diagnosis of BPD and 17 OPD controls. Lifetime patterns of self-destructive behaviour were assessed using the Lifetime Borderline Symptom Index. Childhood experiences were assessed using a semistructured interview by raters who were blind to diagnosis. RESULTS: Chronic self-destructive behaviour discriminated patients with BPD from OPD controls. In the borderline group, parental sexual abuse was significantly related to suicidal behaviour and both parental sexual abuse and emotional neglect were significantly related to self-mutilation. CONCLUSION: Both parental sexual abuse and emotional neglect appear to play a role in the etiology of self-destructive behaviour in BPD. The results highlight the importance of considering the effects of sexual abuse within its environmental context and suggest that the etiology of borderline symptoms is likely multifactorial.

Adolescent↗
PubMed1996

Descriptive study of cough, wheeze and school absence in childhood.

BACKGROUND: Respiratory symptoms such as cough and wheeze are associated with significant morbidity, including school absenteeism. METHODS: A respiratory questionnaire was sent to the parents of all 5727 children aged 7-9 years of age registered with 95 general practitioners in the Southampton area to determine (a) the prevalence of asthma, cough and wheeze, (b) the effects of respiratory symptoms on school absenteeism, and (c) the use of anti-asthma medication. RESULTS: A total of 4830 parents replied (response rate 86%). The 12 month prevalence of wheeze in the absence of cough was 5.5%, cough in the absence of wheeze was 10.0%, and 7.6% reported cough and wheeze; 15.2% of children had been diagnosed. Of the 4830 who replied, 12.7% were receiving bronchodilators, 0.6% xanthine derivatives, 1.7% sodium cromoglycate, and 4.1% inhaled corticosteroids. In all, 348 (7.2%) children had missed more than five days of schooling in the preceding year for respiratory symptoms, while 43 children (0.9%) had missed more than 20 days of schooling in the preceding year. Of the children who had missed more than five days of schooling, 43% reported cough and wheeze, 33% cough alone, and 16% wheeze alone in the preceding year. Compared with children who coughed, those who wheezed were significantly more likely to be diagnosed as asthmatic and to be receiving bronchodilators or inhaled corticosteroids. CONCLUSIONS: In this study, cough was the most frequently reported symptom amongst children missing more than five days of schooling per year.

Absenteeism↗
PubMed1978

Changes in starch content and amylase zymograms during storage of Golden Delicious and Cox's Orange Pippin apples.

Changes in starch content and amylase zymograms were followed during storage of Golden Delicious and Cox's Orange Pippin apples. Although the former was stored at 3-4 degrees C under controlled atmosphere (3--4% O2; 7--8% CO2 by volume) and the latter in air at 17 degrees C, in both, the multiple forms of amylases remained active, even after the starch content decreased to zero. It is the lack of starch substrate, therefore, rather than of enzymes that limits the amylase action in the stored apple.

Amylases↗