Biomedical subjects
C R Snyder
Publications and source records attributed to C R Snyder.
"False" hope.
"False" hope is condemned in the literature on the grounds that it reflects the counterproductive use of: (a) expectations based on illusions rather than reality, (b) inappropriate goals, and (c) poor strategies to reach desired goals. Snyder, Harris, et al.'s (1991) hope theory involving self-referential thoughts about finding routes to desired goals (pathways) and the motivation to use those routes (agency) is used as a framework for examining these three criticisms of false hope. It is concluded that the presently available evidence does not support any of the false-hope criticisms. The implications of hope-related issues for the applied clinical arena are discussed.
Coping with terminal illness: the role of hopeful thinking.
Using Snyder's theory of hope, the role of hope in the process of dying from a terminal illness is discussed. In this theory, hope is defined as the perceived capability to produce workable routes to desired goals (pathways thinking) and the requisite motivation to use those routes (agency thinking). Strategies by which individuals can maintain and even increase hope during the dying process are described, along with interventions to maintain patients' hope. Directions for future research are suggested.
Seizures associated with fluoroquinolones.
OBJECTIVE: To report two cases of seizures following administration of levofoxacin and ciprofloxacin. CASE SUMMARY: A 75-year-old white woman admitted to the hospital was prescribed levofloxacin for ischemic toes. After receiving three doses of oral levofloxacin, the patient experienced a seizure. One month later, the patient was rechallenged with ciprofloxacin and again experienced a seizure. The patient was hypomagnesemic and had elevated serum creatinine at the time of both seizures, and was hyponatremic during the second seizure. A 74-year-old white woman admitted to the hospital was prescribed levofloxacin for bacterial pneumonia. After five doses, the patient experienced a seizure. The woman had no electrolyte imbalances at the time of the seizure and no history of a seizure disorder. DISCUSSION: Quinolone antibiotics vary in their ability to induce seizures, with trovafloxacin having the greatest potential and levofloxacin possibly having the least potential. Neither patient had a history of a previous seizure disorder. Electrolyte imbalances are common with previous reports of fluoroquinolone-induced seizures. CONCLUSIONS: Although levofloxacin monotherapy has not been implicated in inducing seizures, it appears to be the causative agent in the second case. In the first case, the quinolones may have been a necessary, but not sufficient, cause in a patient with electrolyte abnormalities. Risk factors for fluoroquinolone-induced seizures may Include seizure history, electrolyte imbalances,dose unadjusted for renal insufficiency, and concomitant treatment with agents that lower the seizure threshold.
Relations between hope and graduate students' coping strategies for studying and examination-taking.
In 1998, Onwuegbuzie reported a negative relationship between scores on hope and anxiety about statistics among graduate students who were enrolled in statistics classes. In 1999, Snyder posited that hope theory provides a useful framework for assessing students' coping strategies. In support of the utility of hope theory for identifying students with debilitating test-related anxieties, lower scores on the Pathways and Agency subscales which assess hope were related to 87 graduate students' problematic coping strategies for studying and taking statistics examinations. After a brief review of other recent data linking hope to academic performance at both public school and college levels, further research seems appropriate.
Hope, goal-blocking thoughts, and test-related anxieties.
Based on Onwuegbuzie's 1998 findings pertaining to the relationship of lower scores on hope to higher ones on anxiety about statistics, a brief overview of the etiology of test-related anxieties in the context of Snyder's hope theory is given, and the utility of hope theory for helping students with test-related anxieties is explored.
Hope and coping with cancer by college women.
The relations of dispositional hope to various self-reported cancer-related coping activities were examined in 115 college women. Dispositionally high- as compared to low-hope women were more knowledgeable about cancer, and this relationship remained when the shared variances due to previous academic achievement, experience with cancer among family or friends, and positive and negative affectivity were removed. Additionally, high- as compared to low-hope women reported more hope-related coping responses in four separate imagined phases of cancer (prevention/risk, detection, temporal course, and impact), and these relationships remained when shared variances related to previous academic achievement, knowledge about cancer, experience with cancer, and negative affectivity were removed. Hope is discussed as means of maintaining a "fighting spirit" for coping with cancer.
Reality negotiation in non-depressed and depressed persons.
OBJECTIVES: Non-depressed and depressed persons were hypothesized to input and recall self-referential information that was consistent with their self theories. DESIGN: Non-depressed and depressed persons were compared. METHODS: Non-depressed (14) and depressed (14) students chose between positive or negative audio statements, and then recalled the statements. RESULTS: Non-depressed relative to depressed participants: (i) listened more to the positive than the negative tapes; and (ii) fabricated (i.e. incorrectly recalled) less negative messages. CONCLUSION: Partial support is given to reality negotiation processes.
Role of hope in academic and sport achievement.
Hope is the sum of goal thoughts as tapped by pathways and agency. Pathways reflect the perceived capability to produce goal routes; agency reflects the perception that one can initiate action along these pathways. Using trait and state hope scales, studies explored hope in college student athletes. In Study 1, male and female athletes were higher in trait hope than nonathletes; moreover, hope significantly predicted semester grade averages beyond cumulative grade point average and overall self-worth. In Study 2, with female cross-country athletes, trait hope predicted athletic outcomes; further, weekly state hope tended to predict athletic outcomes beyond dispositional hope, training, and self-esteem, confidence, and mood. In Study 3, with female track athletes, dispositional hope significantly predicted athletic outcomes beyond variance related to athletic abilities and affectivity; moreover, athletes had higher hope than nonathletes.
The development and validation of the Children's Hope Scale.
Assuming that children are goal-oriented, it is suggested that their thoughts are related to two components--agency and pathways. Agency thoughts reflect the perception that children can initiate and sustain action toward a desired goal; pathways thoughts reflect the children's perceived capability to produce routes to those goals. Hope reflects the combination of agentic and pathways thinking toward goals. A six-item dispositional self-report index called the Children's Hope Scale is introduced and validated for use with children ages 8-16. Results suggest that the scale evidence internal consistency, and is relatively stable over retesting. Additionally, the scale exhibits convergent, discriminant, and incremental validity. Limitations and uses of the scale are discussed.
Development and validation of the State Hope Scale.
Defining hope as a cognitive set comprising agency (belief in one's capacity to initiate and sustain actions) and pathways (belief in one's capacity to generate routes) to reach goals, the Hope Scale was developed and validated previously as a dispositional self-report measure of hope (Snyder et al., 1991). The present 4 studies were designed to develop and validate a measure of state hope. The 6-item State Hope Scale is internally consistent and reflects the theorized agency and pathways components. The relationships of the State Hope Scale to other measures demonstrate concurrent and discriminant validity; moreover, the scale is responsive to events in the lives of people as evidenced by data gathered through both correlational and causal designs. The State Hope Scale offers a brief, internally consistent, and valid self-report measure of ongoing goal-directed thinking that may be useful to researchers and applied professionals.
Early adolescents exposed to violence: hope and vulnerability to victimization.
Eighty-nine early adolescents were measured for perceptions of hope, exposure to violence, and perceived vulnerability to victimization. Results showed the presence of high hope, together with a high degree of exposure to violence. The adolescents were about equally divided regarding the nature of their own death, while most predicted a violent death for the "average American." The highest levels of hope were reported by those who had witnessed violence but not experienced it personally; those with the greatest exposure to violence predicted their own death would be violent.
Peripheral neuropathy in a cohort of human immunodeficiency virus-infected patients. Incidence and relationship to other nervous system dysfunction.
A cohort of 94 patients infected with human immunodeficiency virus was evaluated clinically and electrophysiologically for the presence of peripheral neuropathy, and the results were compared with evaluations of central nervous system function. Thirty-two (34%) had some degree of peripheral neuropathy; 18 (19%) (six [12%] of the 49 asymptomatic patients, five [45%] of the 11 patients with acquired immunodeficiency syndrome [AIDS], and seven [21%] of the 34 patients with AIDS-related complex) had neuropathy on clinical examination; and 21 (23%) (eight [16%] asymptomatic, four [36%] AIDS, and nine [26%] AIDS-related complex) had neuropathy on electrophysiologic evaluation. There was a significant correlation between the presence of neuropathy and evidence of central nervous system dysfunction.
The will and the ways: development and validation of an individual-differences measure of hope.
Defining hope as a cognitive set that is composed of a reciprocally derived sense of successful (a) agency (goal-directed determination) and (b) pathways (planning of ways to meet goals), an individual-differences measure is developed. Studies demonstrate acceptable internal consistency and test-retest reliability, and the factor structure identifies the agency and pathways components of the Hope Scale. Convergent and discriminant validity are documented, along with evidence suggesting that Hope Scale scores augmented the prediction of goal-related activities and coping strategies beyond other self-report measures. Construct validational support is provided in regard to predicted goal-setting behaviors; moreover, the hypothesized goal appraisal processes that accompany the various levels of hope are corroborated.
Implications of self-reported cognitive and motor dysfunction in HIV-positive patients.
OBJECTIVE: The authors examined HIV-positive subjects to determine the relationship of patient complaints of cognitive and motor dysfunction to psychiatric status and performance on established cognitive and motor function tests. METHOD: HIV-positive volunteers (N = 77) were evaluated at entry into a longitudinal neurological study. Forty were asymptomatic, 29 had AIDS-related complex, and eight had AIDS. The subjects were not selected for the presence or absence of cognitive or motor complaints. Complaints of cognitive and motor dysfunction were assessed with items from the AIDS Clinical Trials Group Macro Neurologic Exam. Current depression and anxiety were assessed with the Profile of Mood States. Psychiatric status was assessed with the NIMH Diagnostic Interview Schedule, a structured interview that provides DSM-III psychiatric diagnoses. Actual cognitive and motor performance was measured with standard neuropsychological tests known to be sensitive to the effects of HIV. RESULTS: Cognitive complaints were found in 38 (49%) of the subjects. These complaints were associated with psychiatric symptoms but not with cognitive performance. Motor complaints, found in 12 (16%) of the subjects, were associated with poorer motor performance but not with psychiatric symptoms. The overall frequency of psychiatric diagnosis was high. CONCLUSIONS: Self-reports of cognitive and motor dysfunction were common in this unselected group and are of concern to health care providers. Potentially treatable psychiatric conditions were also common, particularly in subjects with cognitive complaints, and appropriate treatment referrals are indicated. Patients who report motor dysfunction should be neurologically evaluated for treatable causes.
Generalized melanosis in occult primary melanoma.
Once encountered, generalized melanosis as a consequence of disseminated melanoma is not easily forgotten. Cases in the literature usually have resulted from primary cutaneous melanoma. A case of generalized melanosis caused by an occult primary melanoma is reported in a patient who originally complained of increased pigmentation. Findings of light microscopic studies of involved skin, pathogenesis of generalized melanosis, and possible sites of origin of the primary neoplasm are discussed.
Excuses: their effective role in the negotiation of reality.
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The role of uncertain self-esteem in self-handicapping.
In this article, the hypothesis that some individuals confronted with an intellectual evaluation use a lack of preparation as a "self-handicapping" strategy (Jones & Berglas, 1978) was studied. Sex and both level and certainty of self-esteem were examined in regard to the self-handicapping strategy of lack of effort. Subjects were 54 men and 54 women, certain and uncertain, high and low self-esteem college students, who believed that the experiment was designed to update local norms for a nonverbal test of intellectual ability. After subjects' level of state anxiety was assessed, they were instructed in the benefits of practicing for the evaluation. Subsequently, subjects' state anxiety and preparatory efforts (the primary dependent variables) were measured. Subjects' practice, self-protective attributions, and related affect supported a self-handicapping interpretation for uncertain males but not for uncertain females.