Summary -- Methodology, Theories, Facts -- One / The Challenge of Comparative Research -- Two / Mental Health and Migration in Previous Research -- Three / A Preliminary Working Hypothesis for a Comparative Study of Mental Health -- Four / Procedure and Scope of the Research Project -- Five / Methodology -- Findings of the Research -- Six / Composition of Investigated Samples -- Seven / Depth Interview I. Interrelations between General Adjustment and Mental Health -- Eight / Depth Interview II. General Adjustment, Mental Health and some Character Traits -- Nine / Depth Interview III. General Adjustment, Mental Health and Physical Health -- Ten / Depth Interview IV. General Adjustment, Mental Health and Childhood Experiences -- Eleven / Depth Interview V. General Adjustment, Mental Health and Persecution before Immigration -- Twelve / Depth Interview VI General Adjustment, Mental Health and Outlook on Life (Lebensanschauung) -- Thirteen / Depth Interview VII. General Adjustment, Mental Healthy Immigration and Resettlement -- Fourteen / Written Questionnaire I. Student-Teacher and Interstudent Relationships, Differences in Adjustment -- Fifteen / Written Questionnaire II. At-Home Feeling in the Ulpan in Relation to Other Variables. General Adjustment and Affiliation. A Temporary Community? -- Sixteen / Written Questionnaire III. Relations of Psychosomatic Complaints to Other Variables, Indicative of Psychodynamics in Psychosomatic Medicine -- Seventeen / Homoscedastic and Heteroscedastic Relations -- The Need for Belonging -- Eighteen / Immigrants' Resettlement and Belonging -- Nineteen / Personal Adjustment - A Homeostatic Psychodynamism -- Twenty / Interpersonal Relations and Belonging -- Twenty-One / Amending the Working Hypothesis through Clarification of Concepts -- Twenty-Two / An Operational Theory of Mental Health and Adjustment -- Twenty-Three / Follow-up Investigation -- Conclusions and Outlook -- Twenty-Four / Methodological Conclusions -- Twenty-Five / Practical Conclusions. Mental Health and Social Services for Migrants -- Epilogue / Standing Up to the Challenge -- References -- Appendices -- I / Depth Interview: I. Questionnaire -- II / Depth Interview: II. Explanatory List of Coding -- III / Depth Interview: III. Model of Recording Form -- IV / Depth Interview: IV. Index Form for Punching Machine -- V / Written Questionnaire -- VI / Tables 1 through 55.