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Intervention Research  

Haluk Soydan

This entry regards intervention research as an essential part of social work as a profession and research discipline. A brief history of intervention research reveals that use of intervention research for the betterment of human conditions is contemporary with the genesis of modern social science. Advances in intervention research are attributed to the comprehensive social programs launched during the 1960s in the United States. A contemporary and generic model of intervention research is described. It is argued that it is ethical to use intervention research and unethical not to use it. Assessment of some of the recent advances in policy making and science gives an optimistic picture of the future of intervention research.


Research: History of Research  

Joan Levy Zlotnik

An important attribute of a profession is the systematic study of its practices, to continually advance its service modalities. Throughout its history the social work profession has engaged in research and sought to strengthen connections between research and practice. National social work organizations and federal agencies, especially the National Institute of Mental Health, have all played key roles in stimulating and assessing the research enterprise. International and interdisciplinary research, advanced research methods and research/practitioner/community partnerships provide perspective for future efforts.


Quantitative Research  

Shenyang Guo

This entry describes the definition, history, theories, and applications of quantitative methods in social work research. Unlike qualitative research, quantitative research emphasizes precise, objective, and generalizable findings. Quantitative methods are based on numerous probability and statistical theories, with rigorous proofs and support from both simulated and empirical data. Regression analysis plays a paramountly important role in contemporary statistical methods, which include event history analysis, generalized linear modeling, hierarchical linear modeling, propensity score matching, and structural equation modeling. Quantitative methods can be employed in all stages of a scientific inquiry ranging from sample selection to final data analysis.


Family Therapy  

Cynthia Franklin and Laura M. Hopson

Family intervention has become an important tool for social work practitioners. This entry provides a brief history of family intervention and important influences as well as a synopsis of current research. Although these interventions require more research to better understand the populations for whom they are most effective, the evidence supports their usefulness in addressing such issues as aggression, substance use, and depression, among others.