Spiritual well-being and mental health in university students

Similar documents
Relationship between Spiritual Well-being with Mental Health of Students (Case study: Islamic Azad University, Shiraz)

RELATIONSHIPS BETWEEN SPIRITUAL WELL-BEING AND QUALITY OF LIFE IN HIGHER EDUCATION. Susan Bahrami

Spiritual Wellbeing and Depression in Psychotherapy Outpatients

The Relationship between Spiritual Well-Being and Academic Achievement

Gholam Hossein Javanmard a *

Empirical Correlates of the Spiritual Well-Being and Spiritual Maturity Scales

Anxiety: Trait/Sate, Sensation Seeking and Marital Satisfaction in Married Women

Thriving in College: The Role of Spirituality. Laurie A. Schreiner, Ph.D. Azusa Pacific University

Are dimensions of psycho-social well-being different among Latvian and Romanian University students?

THE RELATIONSHIP BETWEEN LIFE SATISFACTION AND ATTACHMENT STYLES WITH PSYCHOLOGICAL WELL-BEING OF CHILDREN ON COVERED BY BEHZISTEY IN TEHRAN

Self-esteem in Iranian university students and its relationship with academic achievement

The role of emotional schema in prediction of pathological worry in Iranian students

Investigating the Relationship between Spiritual Intelligence and Happiness and Quality of Life for Girl Students

Older P Pyshological Counseling and Guidance Needs Scale: Validity and reliability study

Advances in Environmental Biology

Procedia - Social and Behavioral Sciences 30 (2011) WCPCG-2011

The effectiveness of anger management skills training on reduction of aggression in adolescents

Validation of Coping Styles and Emotions Undergraduate Inventory on Romanian Psychology Students

Procedia - Social and Behavioral Sciences 30 (2011) WCPCG-2011

The Validity And Reliability Of The Turkish Version Of The Perception Of False Self Scale

Health Behavioral Patterns Associated with Psychologic Distress Among Middle-Aged Korean Women

Relation between emotional intelligence and quality of attachment in high school administrators

Procedia - Social and Behavioral Sciences 205 ( 2015 ) th World conference on Psychology Counseling and Guidance, May 2015

3rd World Conference on Psychology, Counselling and Guidance (WCPCG-2012)

Development of self efficacy and attitude toward analytic geometry scale (SAAG-S)

The Relationship between Religiosity and General Health of the Alghadir Students in Zanjan-Iran

Separation Anxiety Inventory: Validity and Reliability Study

WCPCG Published by by Elsevier Ltd. Ltd. Open access under CC BY-NC-ND license.

JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR MULTIDISCIPLINARY Impact Factor 1.625, ISSN: , Volume 3, Issue 8, September 2015

Prevalence of Attention Deficit/Hyperactivity Disorder (AD/HD) in Primary School Children in Tehran

The study of relationship between optimism (positive thinking) and mental health (Case study: students of Islamic Azad University of Bandar Abbas)

Social Identity and gender. Counseling needs in adults

THE RELATIONSHIP BETWEEN SPIRITUAL WELL-BEING WITH QUALITY OF LIFE ON ACTIVE AND NON ACTIVE TEHRAN SPORT AND YOUTH OFFICES EMPLOYEES


The role of Meta-cognitive beliefs on substance dependency

The Validity and Reliability of the Turkish Version of the Integrative Self-knowledge Scale

SURVEY THE RELATIONSHIP BETWEEN IDENTITY STYLE AND MARITAL SATISFACTION

/ *++ ) # $% &!" ' !" ++/4/ 8, : /+/42, : - ' 10 +3/3/ 2, : -./ 0 10 " #$! / 9: <

Relation between Social, Cultural and Religious Attitude with Happiness among Students

Procedia - Social and Behavioral Sciences 152 ( 2014 ) ERPA Academic functional procrastination: Validity and reliability study

The relationship between organizational justice and organizational citizenship behavior

Procedia - Social and Behavioral Sciences 228 ( 2016 )

Effects of conceptualizations of forgiveness on specific and dispositional forgiveness

Developing Academic Identity Statues Scale (AISS) and Studying its Construct Validity on Iranian Students

Big five personality traits and coping styles predict subjective wellbeing: A study with a Turkish Sample

A Study on the Differences between Spiritual Wellbeing and Sexual Attitude Considering the Type of University

Study the Rate of Practice of Religious Beliefs and Duties in Undergraduate Students of Hormozgan University

Relationship between Social Support and Loneliness and Academic Adjustment among University Students

Procedia - Social and Behavioral Sciences 159 ( 2014 ) WCPCG 2014

AEIJMR Vol 3 Issue 5 May 2015 ISSN

Religiosity and its Effect on. Psychological Well-being in Older Adults. Steve Miller. Florida International University

Procedia - Social and Behavioral Sciences 140 ( 2014 ) PSYSOC 2013

Relationship between Tabriz elementary students' mothers' personality disorders and antisocial behavioral disorder of children in

International Journal of Advancements in Research & Technology, Volume 2, Issue 6, June ISSN

The effect of little bird program in decreasing problem behaviors of autistic children

Socioeconomic Status, Parental Support, Motivation and Self-Confidence in Youth Competitive Sport

The Relationship between Identity Styles and Psychological Wellbeing in Sample of College Students

A Study of Life Satisfaction and Optimism in Relation to Psychological Well-Being Among Working and Non Working Women

The comparison of sensation seeking and five big factors of personality between internet dependents and non-dependents

The Relationship between Personality Dimensions and Religious Orientation

The study of relationship between spiritual intelligence, resilience and spiritual well-being with occupational burnout in nurses

Procedia - Social and Behavioral Sciences 152 ( 2014 ) ERPA 2014

Mediating Effects of Growth Mindset in the Relationship between Employment Stress and Happiness of University Students in Korea

The needs of iranian families of children with autism spectrum disorder, cross-cultural study

An Investigation of the Relationship between Sources of Meaning of Life and Mental Health

Analyzing the Relationship between the Personnel s Achievement Motivation and their Performance at the Islamic Azad University, Shoushtar branch

Procedia - Social and Behavioral Sciences 191 ( 2015 ) WCES 2014

The Positive Psychotherapy Inventory (PPTI): Reliability and Validity Study in Turkish Population

Psychometric Properties of Farsi Version State-Trait Anger Expression Inventory-2 (FSTAXI-2)

The Influence of Group Training of Healthy Life Style on Psychological Well-Being and Symptoms of Mental Disorders Using psychodrama

Original article J Bas Res Med Sci 2017; 4(3):19-25.

Creating and Validating the Adjustment Inventory for the Students of Islamic Azad University of Ahvaz

Procedia - Social and Behavioral Sciences 187 ( 2015 ) PSIWORLD 2014

EFFECTIVENESS OF STRESS INOCULATION TRAINING ON RESILIENCY AND MENTAL HEALTH AMONG GIRL ADOLESCENTS

Procedia - Social and Behavioral Sciences 180 ( 2015 )

The Relationship of Mental Pressure with Optimism and Academic Achievement Motivation among Second Grade Male High School Students

A new method to promote the quality of life based on spiritual wellbeing in health care workers: A predictive model

Procedia - Social and Behavioral Sciences 159 ( 2014 ) WCPCG Stress Coping of Patients with Substance use Disorder in Latvia

Relationship between Coping Styles and Religious Orientation with Mental Health in the Students of the Nursing-Midwifery Faculty of Zabol

MALAY VERSION OF SPIRITUAL WELL-BEING SCALE : Is Malay Spiritual Well-being Scale a Psychometrically Sound Instrument?

Measuring Perceived Social Support in Mexican American Youth: Psychometric Properties of the Multidimensional Scale of Perceived Social Support

An in-depth analysis of the relationship between age and attribution in EFL contexts

Vitanya Vanno *, Wannee Kaemkate, Suwimon Wongwanich

Examining of adaptability of academic optimism scale into Turkish language

J. Psych. Beh. Stud. Vol., 3 (7), , 2015

mental health WHO well-being

Efficacy of life skills training on increase of mental health and self esteem of the students

Comparison of obsessive beliefs, life expectancy, and conflict resolution styles of mothers of autistic and none-autistic children

Downloaded from journal.bums.ac.ir at 0:18 IRST on Sunday February 17th 2019

A 3-Factor Model for the FACIT-Sp

Relation between emotional intelligence and behavioral symptoms in delinquent adolescents

STUDY ON THE CORRELATION BETWEEN SELF-ESTEEM, COPING AND CLINICAL SYMPTOMS IN A GROUP OF YOUNG ADULTS: A BRIEF REPORT

The Turkish adaptation of the Mother-Adult Daughter Questionnaire

International Journal of Social Sciences (IJSS) Vol.3, No.4, 2013

Predictors of Avoidance of Help-Seeking: Social Achievement Goal Orientation, Perceived Social Competence and Autonomy

Psychology of religion has been captivated by

SPIRITUALITY AND THE CALL TO SERVICE AMONG COLLEGE STUDENTS. Dexter R. Freeman

ABSTRACT. Field of Research: Academic achievement, Emotional intelligence, Gifted students.

Level of Emotional Intelligence (EQ) Scores among Engineering Students during Course Enrollment and Course Completion

Quality of Life Among Adults with Attention Deficit Hyperactivity Disorder (ADHD): Comparative Study Between the Three Presentations of ADHD

Transcription:

Available online at www.sciencedirect.com Procedia Social and Behavioral Sciences 5 (2010) 1477 1481 WCPCG-2010 Spiritual well-being and mental health in university students Esa Jafari a, Gholam Reza Dehshiri b, Hosein Eskandari b, Mahmoud Najafi c, Rasoul Heshmati d F*F, Jafar Hoseinifar b a Payame Noor University,Astara,1853774941,Iran b Faculty of Psychology and Education, Allame tabatabaei University,Tehran,Iran c Faculty of Psychology and Education, Semnan University,Semnan,Iran d Faculty of Psychology and Education, Tehran University,Tehran,Iran Received January 6, 2010; revised February 9, 2010; accepted March 25, 2010 Abstract The present study investigates the relationship between spiritual well-being and mental health in university students. The research sample consisted of 223 university students (110 males and 113 females), who took Spiritual Well-Being Scale and General Health Questionnaire. The results of the study showed that there is a significant relationship between spiritual well-being and mental health. Nevertheless, there was no significant relationship between spiritual well-being and somatic symptoms, anxiety, social dysfunction and depression. The results of the regression analysis showed that religious and existential well-being significantly anticipated mental health. As well, another finding was that spiritual and existential well-being in females was significantly higher than in males. There was no sex-related difference in mental health scores. 2010 Elsevier Ltd. Open access under CC BY-NC-ND license. Keywords: spiritual well-being; existential well-being; religious well-being; mental health. 1. Introduction In recent years, the specialized literatures relating to the spirituality and religion are developing ever increasingly (Simpson, 2007). On this basis, researchers have widely studied the effect of religion and spirituality in psychological adaptation and mental health in various researches. These efforts have created a wide range of research literature relating to this field and indicated that religious and spiritual beliefs have relation significantly with a range of mental health indicators such as decrease of anxiety, depression, increase of self-esteem, tolerance and self-control (Bergin, 1991). Thus, the spiritual well-being can be defined as a feeling of communicating with the others, having meaning and goal in life and having belief and relation with an exalted power (Hawks, et al. 1995). Ellison (1983) states that spiritual well-being includes a psycho-social and also a religious element. Religious well-being which is a religious * Rasoul Heshmati. Tel: +98-0935-862-8166; fax: +98-021-3388-2314. E-mail address: n_heshmati@yahoo.com. 1877-0428 2010 Published by Elsevier Ltd. doi:10.1016/j.sbspro.2010.07.311 Open access under CC BY-NC-ND license.

1478 Esa Jafari et al. / Procedia Social and Behavioral Sciences 5 (2010) 1477 1481 element indicates a relation with a superior power i.e God. Existential well-being is a psychosocial element and indicates feeling of a person of who he/she is, what he/she does and why and where he/she belongs to. Both religious and Existential well-being includes sublimit and movement beyond self. There are various researchers in supporting this theory that spiritual well-being can reinforce psychological function and adaptation. The significant correlations have been reported between of spiritual well-being and variables such as religious deeds (Bassett, et al. 1991), depression, self-esteem and internal religious orientation (Genia,. 2001) emotional well-being and life satisfaction (Kim, 2000) emotional instability and mood disorders (Leach, & Lark, 2004) and stress (Woodbury, 1992). Since the psychological discomfort usually occurs in the whole life it can be said that creating and keeping sense of spiritual well-being has a vital role in adaptation to the stress. Researches indicates that the spiritual well-being has a positive influence in promoting individual mental health and decrease mental disorders and threatening factors of individual mental health field. According to the importance of spiritual well-being factor and its role in promoting the mental health and according to the fact that research hasn't carried out which considers the relation between spiritual well-being and mental health in Iran, Carrying out such a research is of high importance between students which constitute a relatively large class of people in society and is a step toward identifying the effective factors on the mental health and decreasing mental disorders. According to the aforementioned goal and research records of test case in this field, the present research seeks for studying the relation between "spiritual well-being" and "mental health". 2. Method 2.1. Population and sample The statistical population of the present research includes all students of Allame Tabatabaei University of Tehran which had been educating in 2008 academic year. From this population, sample of 223 people were chosen by using cluster random sampling method which consisted of 110 males and 113 females. The age range of subjects between 18 to 29 years old was the mean of 22/07 and standard deviation of 2/38. 2.2. Data collection instruments Spiritual Well-Being Scale (SWB). The SWB (Ellison, 1983) has two subscales, Religious Well-Being (RWB) and Existential Well-Being (EWB), each of which has 10 items. The scales are rated from 1 (strongly disagree) to 6 (strongly agree). The RWB and EWB subscale scores can range from 0 to 60. Scores for the study sample ranged from 15 to 60 for RWB and 18 to 60 for EWB. The RWB subscale assesses the relationship with god, whereas the EWB subscale assesses meaning and purpose. The Cronbach s alphas, calculated for the subscales and total scale: RWB alpha = 0.91 and EWB alpha = 0.91 and SWB=0.93 (Paloutzian, & Ellison, 1982). Test retest reliability reported by Ellison was 0.93, SWB; 0.96, RWB; and 0.86, EWB. In addition, Ellison reports face validity and SWB scale theoretical correlation with other scales purported to measure spirituality. GHQ-28: In the GHQ-28 (Goldberg, 1972), the respondent is asked to compare her recent psychological state with her usual state. All items have a four-point scoring system using Likert scoring (0 1 2 3). The GHQ-28 has a fourfactor structure (items 1 7: somatic symptoms, items 8 14: anxiety/insomnia, items 15 22: social dysfunction, and items 22 28: depression) (Aderibigbe, & et al., 1996). A previous study demonstrated that the best cut-off point was a score of 7 8 for the GHQ-28; a score of 8 or higher indicated psychological problems (Revilla, Alvarez, & Castillo, 2004). Psychometric properties (validity and reliability) of this scale has approved by previous researches (Goldberg, 1972; Aderibigbe, & et al., 1996; Revilla, Alvarez, & Castillo, 2004;). 2.3 Data analysis The obtained data were evaluated by using SPSS 15.00 (Statistical Package for Social Sciences). In the analysis of data, Pearson`s correlation coefficient was used to study correlation between spiritual well-being and mental health, Step by step regression analysis method was used in order to consider that how much scores of religious and existential well-being can predict the scores of mental health, Multivariate and Univariate analysis of variance test to compare the spiritual well-being and mental health of male and female students and to compare the religious and existential well-being and the scores of mental health of male and female students. 3. Results

Esa Jafari et al. / Procedia Social and Behavioral Sciences 5 (2010) 1477 1481 1479 Pearson`s correlation coefficient was used by scores of mental health in order to consider the relation between spiritual well-being and its fields (religious and existential well-being). Table 1 is the correlation matrix between research variables. U1.correlation matrix among variables variable 1 2 3 4 5 6 7 8 1-spiritual well being 1 2-Religious well-being 0/91** 1 3-Existential well-being -0/91** 0/63** 1 4-Mental health -0/56** -0/33** -0/66** 1 5-Somatic symptoms -0/29** -0/08 0/42** 0/81** 1 6-anxiety -0/44** -0/27** -0/51** -0/83** -0/65** 1 7-Social dysfunction -0/45** -0/37** -0/42** 0/61** 0/25** 0/36** 1 8-depression -0/57** -0/33** -0/68** -0/83** -0/55** -0/54** -0/43** 1 **p<0/01 As it is seen from the table, there's a significant correlation between spiritual well-being and mental health (r = 0.56, P <0.01). Since higher score in the General Health Questionnaire (GHQ) indicates mental disorder, it can be concluded that there's a significant and negative relation between mental disorder and spiritual well-being. Also the correlation of spiritual well-being is significant by four scale's scores of mental health. Step by step regression method was used in order to consider that how much scores of religious and existential wellbeing can predict the scores of mental health which its results are presented in table 2. U2. step by step regression analyses for predicting of mental health step Predictive variable B R R 2 1 Existential well-being -0/81* -0/66 0/66 0/44 2 Existential well-being -0/92* -0/75 Religious well-being -0/20* -0/14 *P<0/01 0/68 0/46 As it is seen from the table, existential well-being is entered into the regression equation in the first step. This variable solely predicts 44 percents of the scores' variance of mental health. Also religious well-being is entered into the equation in the second step which the rate of explanation coefficient 2 ( R ) is reached to 0.46 by adding this variable, that is, 0.02 is added to the explanation coefficient. Generally, existential and religious well-being explain 46 percents of the scores' variance of metal health. Multivariate analysis of variance (MANOVA) was used in order to compare the scores of spiritual well-being and mental health of male and female students. The mean and standard deviation of research variables by separating gender in table 3. The results of multivariate analysis of variance test (Hotelling`s T) are presented for comparing total scores of spiritual well-being and metal health of male and female students in table 3. UTable 3. The results of multivariate and Univariate analysis of variance test to compare the spiritual well-being and mental health of male and female students resource multivariate univariate F spiritual well being Mental health sex 7/80** 8/88** 0/16

1480 Esa Jafari et al. / Procedia Social and Behavioral Sciences 5 (2010) 1477 1481 P<0/001** As it is seen from table, the effect of gender is significant on the linear combination of spiritual well-being and mental health variables [F (2, 220) = 7.80, P<0.01]. univariate analysis of variance test was used in order to consider that the effect of gender is significant for scores spiritual well-being. [F (1, 221) = 8.88, P<0.01]. In away that the mean of spiritual well-being scores of females is more than males significantly but the effect of gender is not significant on the score of mental health. [F (1, 221) = 0.16, P>0.05]. The results of multivariate analysis of variance test are presented for comparing the scores of religious, existential well-being and the scores of mental health scales in table 4. UTable 4. The results of multivariate and Univariate analysis of variance test to compare the religious, existential well-being and the scores of mental health of male and female students multivariate univariate resource F Religious well-being Existential well-being Somatic symptoms anxiety Social dysfunction depression sex 3/88** 14/19** 3/08 0/001 0/02 0/93 0/1 P<0/001** As it is seen from the table, the effect of gender is significant on linear combination of variables [F (6, 216) = 3.88, P<0.01]. The results of univariate analysis variance test indicates that the effect of gender is only significant on the scores of religious well-being [F (1, 221) = 14.19, P<0.01] in a way that the mean of religious well-being scores of females is more than males. There's no difference between male and female students in other variables. 4. Discussion and conclusion The goal of the present research was to study spiritual well-being and mental health between the students. Research's findings showed that there's a negative and significant between spiritual well-being and mental disorder. Also the religious and existential well-being had a negative and significant correlation with body signs, anxiety, dysfunction in social performance and depression. The resultsof the research is consistent with the findings of (Ventis, 1995; Koeing, et al.2001; Rippentrop, & Elizabebeth, 2005; Lynn- Rew, & Wrong, 2006 ). Spirituality contributes to promote the mental health by providing a framework for describing life's experiences and because of that creating a sense of integrity and existential interconnection. Individuals with spiritual experience and religious beliefs can cope with their stress and psychological problems and the confrontation methods are stronger in them, spirituality creates a power which affects on the physical postures, feelings, thoughts and communications and will be affected by them. Actually, spiritual well-being has a protective effect and acts against stress and leads to gain physical and psychological healthy life and supportive behaviors such less use of cigarette and alcohol, more physical activity, having goal and meaning in life, hopefulness, optimism and improves individual's psychological status (Harvey, 2004). The other results of this research were that the scores of spiritual and religious well-being of females are more than the mean of males. The finding is consistent with the research's' results of Kellums (1995) and Hammermeister, et al. (2005). Higher scores of females in spiritual well-being may be because of being socialized, the roles which are expected of them, different life experiences and coping strategies to men (Hammermeister, et al. 2005). Also in Levin and et al. (1994) opinion, there is possibility that roles, characteristics and behaviors which are attributed to the women socially is more compatible with some religious principles and norms. It should be mentioned that being a significant relation between spiritual welfare and mental health doesn't mean having cause-effect relations between these variables. There is the possibility that the relation between spiritual well-being and mental health is a bilateral relation or relation between two variables is the effect of other variable and access to the closer relation of these variables require time and related researches in spiritual well-being and mental health field. According to the point that spiritual well-being is involved in factors which has entered into the psychological literature and its role and importance is confirmed in other countries within various researches, it is clear that carrying out a research is not enough on students in spiritual well-being field and its relation with mental health and the results of this finding can not be extended to the other individuals. However, carrying out the other

Esa Jafari et al. / Procedia Social and Behavioral Sciences 5 (2010) 1477 1481 1481 researches are vital on the normal and clinical populations in different ages and various statistical population. According to the importance of spiritual well-being role in consolidating physical, mental and social aspects of individual, intervention and training is considered a necessary issue in this field and can have an important key role for clinical specialists. References Aderibigbe, Y.A. & et al. (1996). Factor structure of the 28-item general health questionnaire in a sample of antenatal women. Int J Psychiatry Med, 26(3), 263 9. Bassett, R. L., & et al. (1991). Measuring Christian maturity: A comparison of several scales. Journal of Psychology and Theology, 19, 84-93. Bergin, A.E. (1991). Values and religious issues in psychotherapy and mental health. American Psychologist.46, 394-403. Ellison, C. W. (1983). Spiritual well-being: Conceptualization and measurement. Journal of Psychology and Theoloy, 114,330-340. Genia, V. (2001). Evaluation of. Spiritual well-being scale in a sample of college students. International Journal for the Psychology of Religion,11(1), 25-33. Goldberg, D. P. (1972). The detection of psychiatric. Illness by Questionnaire.London, UK: Oxford University press Hammermeister, J., Flint.M, Alayli. A, Ridnour.A, Peterson, M. (2005).gender differences in spiritual well-being: are females more spiritually well than males? American journal of health studies, 20 (2), 80-84. Harvey, M.(2004). Development and Psychometric Validation of the State-Trait Spirituality Inventory.Unpublished dissertation. University of north texas. Hawks, S. R., Hull, M., Thalman, R. L., & Richins, P. M. (1995). Review of spiritual health: definition, role, and intervention strategies in health promotion. American Journal of Health Promotion, 9, 371-378. Kellums, K. J. (1995). Gender analysis of the spiritual well-being scale. Unpublished doctoral dissertation, George Fox University, Newberg, OR. Kim,J., Heinemann, A.W., Bode,R. K., Sliwa.J., & King,R. B.(2000).Spirituality quality of life, and functional recovery after medical rehabilitation. Rehabilitation Psychology, 45,365-385. Koeing, H. G., McCullogh, M. e, & Larson, D.B. (2001).Handbook of religion and health. New York: Oksford. Leach, M. M., & Lark, R. (2004). Does spirituality add to personality in the study of trait forgiveness? Personality and Individual Differences, 37, 147-156. Levin, J. S., Taylor, R. J., & Chatters, L. M. (1994). Race and gender differences in religiosity among older adults: Findings from four national surveys. Journal of Gerontology, 49(3), 137-145. Lynn Rew,R.N.,Joel Wrong,L.L.B(2006).A systematic review of associations among religiosity/spirituality and adolescent health and behaviors. society for Adolescent Medicine.38,433-442. Paloutzian, R. F., & Ellison, C. W. (1982). Loneliness: A sourcebook of current theory, research and therapy. New York: Wiley. Revilla, D.L., Alvarez, D.L., Castillo, J.D. (2004) Use of the Goldberg General Health Questionnaire (GHQ-28) to detect psychosocial problems in the family physician s office. Aten Primria,33(8), 417 22 Rippentrop, A. Elizabebeth. (2005). A Review of the Role and Religion and Spirituality in Chronic Pain Popuiations. Rehabilitation Psychology.50,278-284. Ventis, W.L. (1995).The reiationship between religion and mental helth. Journal of social Issues.51 (2), 33-48. Woodbury, A.M. (1992).Social support network and adjustment in childhood: A longitudinal analysis. (Doctora dissertation, Boston university, MA). Dissertation Abstract International, 52,4524B.