Carpers 5 ways of knowing

CHAPTER 1: Philosophy, Science, and Nursing

Melanie McEwen

Largely due to the work of nursing scientists, nursing theorists, and nursing scholars over the past five decades, nursing has been recognized as both an emerging profession and an academic discipline. Crucial to the attainment of this distinction have been numerous discussions regarding the phenomena of concern to nurses and countless efforts to enhance involvement in theory utilization, theory generation, and theory testing to direct research and improve practice.

A review of the nursing literature from the late 1970s until the present shows sporadic discussion of whether nursing is a profession, a science, or an academic discipline. These discussions are sometimes pleading, frequently esoteric, and occasionally confusing. Questions that have been raised include: What defines a profession? What constitutes an academic discipline? What is nursing science? Why is it important for nursing to be seen as a profession or an academic discipline?

Nursing as a Profession

In the past, there has been considerable discussion about whether nursing is a profession or an occupation. This is important for nurses to consider for several reasons. An occupation is a job or a career, whereas a profession is a learned vocation or occupation that has a status of superiority and precedence within a division of work. In general terms, occupations require widely varying levels of training or education, varying levels of skill, and widely variable defined knowledge bases. In short, all professions are occupations, but not all occupations are professions (Finkelman & Kenner, 2013).

Professions are valued by society because the services professionals provide are beneficial for members of the society. Characteristics of a profession include (1) defined and specialized knowledge base, (2) control and authority over training and education, (3) credentialing system or registration to ensure competence, (4) altruistic service to society, (5) a code of ethics, (6) formal training within institutions of higher education, (7) lengthy socialization to the profession, and (8) autonomy (control of professional activities) (Ellis & Hartley, 2012; Finkelman & Kenner, 2013; Rutty, 1998). Professions must have a group of scholars, investigators, or researchers who work to continually advance the knowledge of the profession with the goal of improving practice (Schlotfeldt, 1989). Finally, professionals are responsible and accountable to the public for their work (Hood, 2010). Traditionally, professions have included the clergy, law, and medicine.

Until near the end of the 20th century, nursing was viewed as an occupation rather than a profession. Nursing has had difficulty being deemed a profession because many of the services provided by nurses have been perceived as an extension of those offered by wives and mothers. Additionally, historically, nursing has been seen as subservient to medicine, and nurses have delayed in identifying and organizing professional knowledge. Furthermore, education for nurses is not yet standardized, and the three-tier entry-level system (diploma, associate degree, and bachelor’s degree) into practice that persists has hindered professionalization because a college education is not yet a requirement. Finally, autonomy in practice is incomplete because nursing is still dependent on medicine to direct much of its practice.

On the other hand, many of the characteristics of a profession can be observed in nursing. Indeed, nursing has a social mandate to provide health care for clients at different points in the health–illness continuum. There is a growing knowledge base, authority over education, altruistic service, a code of ethics, and registration requirements for practice. Although the debate is ongoing, it can be successfully argued that nursing is an aspiring, evolving profession (Finkelman & Kenner, 2013; Hood, 2010; Judd, Sitzman, & Davis, 2010). See Link to Practice 1-1 for more information on the future of nursing as a profession.

Link to Practice 1-1: The Future of Nursing

The Institute of Medicine (IOM, 2011) recently issued a series of sweeping recommendations directed to the nursing profession. The IOM explained their “vision” is to make quality, patient-centered care accessible for all Americans. Recommendations included a three-pronged approach to meeting the goal.

The first “message” was directed toward transformation of practice and precipitated the notion that nurses should be able to practice to the full extent of their education. Indeed, the IOM advocated for removal of regulatory, policy, and financial barriers to practice to ensure that “current and future generations of nurses can deliver safe, quality, patient-centered care across all settings, especially in such areas as primary care and community and public health” ( p. 30 ).

A second key message related to the transformation of nursing education. In this regard, the IOM promotes “seamless academic progression” ( p. 30 ), which includes a goal to increase the number and percentage of nurses who enter the workforce with a baccalaureate degree or who progress to the degree early in their career. Specifically, they recommend that 80% of RNs be BSN prepared by 2020. Last, the IOM advocated that nurses be full partners with physicians and other health professionals in the attempt to redesign health care in the United States.

These “messages” are critical to the future of nursing as a profession. Indeed, standardization of entry level into practice at the BSN level, coupled with promotion of advanced education and independent practice, and inclusion as “leaders” in the health care transformation process, will help solidify nursing as a true profession.

Nursing as an Academic Discipline

Disciplines are distinctions between bodies of knowledge found in academic settings. A discipline is “a branch of knowledge ordered through the theories and methods evolving from more than one worldview of the phenomenon of concern” (Parse, 1997, p. 74). It has also been termed a field of inquiry characterized by a unique perspective and a distinct way of viewing phenomena (Butts, Rich, & Fawcett, 2012; Parse, 1999).

Viewed another way, a discipline is a branch of educational instruction or a department of learning or knowledge. Institutions of higher education are organized around disciplines into colleges, schools, and departments (e.g., business administration, chemistry, history, and engineering).

Disciplines are organized by structure and tradition. The structure of the discipline provides organization and determines the amount, relationship, and ratio of each type of knowledge that comprises the discipline. The tradition of the discipline provides the content, which includes ethical, personal, esthetic, and scientific knowledge (Northrup et al., 2004; Risjord, 2010). Characteristics of disciplines include (1) a distinct perspective and syntax, (2) determination of what phenomena are of interest, (3) determination of the context in which the phenomena are viewed, (4) determination of what questions to ask, (5) determination of what methods of study are used, and (6) determination of what evidence is proof (Donaldson & Crowley, 1978).

Knowledge development within a discipline proceeds from several philosophical and scientific perspectives or worldviews (Litchfield & Jonsdottir, 2008; Newman, Sime, & Corcoran-Perry, 1991; Parse, 1999; Risjord, 2010). In some cases, these worldviews may serve to divide or segregate members of a discipline. For example, in psychology, practitioners might consider themselves behaviorists, Freudians, or any one of a number of other divisions.

Several ways of classifying academic disciplines have been proposed. For instance, they may be divided into the basic sciences (physics, biology, chemistry, sociology, anthropology) and the humanities (philosophy, ethics, history, fine arts). In this classification scheme, it is arguable that nursing has characteristics of both.

Distinctions may also be made between academic disciplines (e.g., physics, physiology, sociology, mathematics, history, philosophy) and professional disciplines (e.g., medicine, law, nursing, social work). In this classification scheme, the academic disciplines aim to “know,” and their theories are descriptive in nature. Research in academic disciplines is both basic and applied. Conversely, the professional disciplines are practical in nature, and their research tends to be more prescriptive and descriptive (Donaldson & Crowley, 1978).

Nursing’s knowledge base draws from many disciplines. In the past, nursing depended heavily on physiology, sociology, psychology, and medicine to provide academic standing and to inform practice. In recent decades, however, nursing has been seeking what is unique to nursing and developing those aspects into an academic discipline. Areas that identify nursing as a distinct discipline are as follows:

· An identifiable philosophy

· At least one conceptual framework (perspective) for delineation of what can be defined as nursing

· Acceptable methodologic approaches for the pursuit and development of knowledge (Oldnall, 1995)

To begin the quest to validate nursing as both a profession and an academic discipline, this chapter provides an overview of the concepts of science and philosophy. It examines the schools of philosophical thought that have influenced nursing and explores the epistemology of nursing to explain why recognizing the multiple “ways of knowing” is critical in the quest for development and application of theory in nursing. Finally, this chapter presents issues related to how philosophical worldviews affect knowledge development through research. This chapter concludes with a case study that depicts how “the ways of knowing” in nursing are used on a day-to-day, even moment-by-moment, basis by all practicing nurses.

Introduction to Science and Philosophy

Science is concerned with causality (cause and effect). The scientific approach to understanding reality is characterized by observation, verifiability, and experience; hypothesis testing and experimentation are considered scientific methods. In contrast, philosophy is concerned with the purpose of human life, the nature of being and reality, and the theory and limits of knowledge. Intuition, introspection, and reasoning are examples of philosophical methodologies. Science and philosophy share the common goal of increasing knowledge (Butts et al., 2012; Fawcett, 1999; Silva, 1977). The science of any discipline is tied to its philosophy, which provides the basis for understanding and developing theories for science (Gustafsson, 2002; Silva & Rothbert, 1984).

Overview of Science

Science is both a process and a product. Parse (1997) defines science as the “theoretical explanation of the subject of inquiry and the methodological process of sustaining knowledge in a discipline” (p. 74). Science has also been described as a way of explaining observed phenomena as well as a system of gathering, verifying, and systematizing information about reality (Streubert & Carpenter, 2011). As a process, science is characterized by systematic inquiry that relies heavily on empirical observations of the natural world. As a product, it has been defined as empirical knowledge that is grounded and tested in experience and is the result of investigative efforts. Furthermore, science is conceived as being the consensual, informed opinion about the natural world, including human behavior and social action (Gortner & Schultz, 1988).

Science has come to represent knowledge, and it is generated by activites that combine advancement of knowledge (research) and explanation for knowledge (theory) (Powers & Knapp, 2011). Citing Van Laer, Silva (1977) lists six characteristics of science ( Box 1-1 ).

Box 1-1: Characteristics of Science

· 1. Science must show a certain coherence.

· 2. Science is concerned with definite fields of knowledge.

· 3. Science is preferably expressed in universal statements.

· 4. The statements of science must be true or probably true.

· 5. The statements of science must be logically ordered.

· 6. Science must explain its investigations and arguments.

Source: Silva (1977).

Science has been classified in several ways. These include pure or basic science, natural science, human or social science, and applied or practice science. The classifications are not mutually exclusive and are open to interpretation based on philosophical orientation. Table 1-1 lists examples of a number of sciences by this manner of classification.

Table 1-1: Classifications of Science

Classification

Examples

Natural sciences

Chemistry, physics, biology, physiology, geology, meteorology

Basic or pure sciences

Mathematics, logic, chemistry, physics, English (language)

Human or social sciences

Psychology, anthropology, sociology, economics, political science, history, religion

Practice or applied sciences

Architecture, engineering, medicine, pharmacology, law

Some sciences defy classification. For example, computer science is arguably applied or perhaps pure. Law is certainly a practice science, but it is also a social science. Psychology might be a basic science, a human science, or an applied science, depending on what aspect of psychology one is referring to.

There are significant differences between the human and natural sciences. Human sciences refer to the fields of psychology, anthropology, and sociology and may even extend to economics and political science. These disciplines deal with various aspects of humans and human interactions. Natural sciences, on the other hand, are concentrated on elements found in nature that do not relate to the totality of the individual. There are inherent differences between the human and natural sciences that make the research techniques of the natural sciences (e.g., laboratory experimentation) improper or potentially problematic for human sciences (Gortner & Schultz, 1988).

It has been posited that although nursing draws on the basic and pure sciences (e.g., physiology and chemistry) and has many characteristics of social sciences, it is without question an applied or practice science. However, it is important to note that it is also synthesized, in that it draws on the knowledge of other established disciplines—including other practice disciplines (Dahnke & Dreher, 2011; Holzemer, 2007; Risjord, 2010).

Overview of Philosophy

Within any discipline, both scholars and students should be aware of the philosophical orientations that are the basis for developing theory and advancing knowledge (Dahnke & Dreher, 2011; DiBartolo, 1998; Northrup et al., 2004; Risjord, 2010). Rather than a focus on solving problems or answering questions related to that discipline (which are tasks of the discipline’s science), the philosophy of a discipline studies the concepts that structure the thought processes of that discipline with the intent of recognizing and revealing foundations and presuppositions (Blackburn, 2008; Cronin & Rawlings-Anderson, 2004).

Philosophy has been defined as “a study of problems that are ultimate, abstract, and general. These problems are concerned with the nature of existence, knowledge, morality, reason, and human purpose” (Teichman & Evans, 1999, p. 1). Philosophy tries to discover knowledge and truth and attempts to identify what is valuable and important.

Modern philosophy is usually traced to Rene Descartes, Francis Bacon, Baruch Spinoza, and Immanuel Kant (ca. 1600–1800). Descartes (1596–1650) and Spinoza (1632–1677) were early rationalists. Rationalists believe that reason is superior to experience as a source of knowledge. Rationalists attempt to determine the nature of the world and reality by deduction and stress the importance of mathematical procedures.

Bacon (1561–1626) was an early empiricist. Like rationalists, he supported experimentation and scientific methods for solving problems.

The work of Kant (1724–1804) set the foundation for many later developments in philosophy. Kant believed that knowledge is relative and that the mind plays an active role in knowing. Other philosophers have also influenced nursing and the advance of nursing science. Several are discussed later in the chapter.

Although there is some variation, traditionally, the branches of philosophy include metaphysics (ontology and cosmology), epistemology, logic, esthetics, and ethics or axiology. Political philosophy and philosophy of science are added by some authors (Rutty, 1998; Teichman & Evans, 1999). Table 1-2 summarizes the major branches of philosophy.

Table 1-2: Branches of Philosophy

Branch

Pursuit

Metaphysics

Study of the fundamental nature of reality and existence—general theory of reality

Ontology

Study of theory of being (what is or what exists)

Cosmology

Study of the physical universe

Epistemology

Study of knowledge (ways of knowing, nature of truth, and relationship between knowledge and belief)

Logic

Study of principles and methods of reasoning (inference and argument)

Ethics (axiology)

Study of nature of values; right and wrong (moral philosophy)

Esthetics

Study of appreciation of the arts or things beautiful

Philosophy of science

Study of science and scientific practice

Political philosophy

Study of citizen and state

Sources: Blackburn (2008); Teichman & Evans (1999).

Science and Philosophical Schools of Thought

The concept of science as understood in the 21st century is relatively new. In the period of modern science, three philosophies of science (paradigms or worldviews) dominate: rationalism, empiricism, and human science/phenomenology. Rationalism and empiricism are often termed received view and human science/phenomenology and related worldviews (i.e., historicism) are considered perceived view(Hickman, 2011; Meleis, 2012). These two worldviews dominated theoretical discussion in nursing through the 1990s. More recently, attention has focused on another dominant worldview: “postmodernism” (Meleis, 2012; Reed, 1995).

Received View (Empiricism, Positivism, Logical Positivism)

Empiricism has its roots in the writings of Francis Bacon, John Locke, and David Hume, who valued observation, perception by senses, and experience as sources of knowledge (Gortner & Schultz, 1988; Powers & Knapp, 2011). Empiricism is founded on the belief that what is experienced is what exists, and its knowledge base requires that these experiences be verified through scientific methodology (Dahnke & Dreher, 2011; Gustafsson, 2002). This knowledge is then passed on to others in the discipline and subsequently built on. The term received view or received knowledge denotes that individuals learn by being told or receiving knowledge.

Empiricism holds that truth corresponds to observable, reduction, verification, control, and bias-free science. It emphasizes mathematic formulas to explain phenomena and prefers simple dichotomies and classification of concepts. Additionally, everything can be reduced to a scientific formula with little room for interpretation (DiBartolo, 1998; Gortner & Schultz, 1988; Risjord, 2010).

Empiricism focuses on understanding the parts of the whole in an attempt to understand the whole. It strives to explain nature through testing of hypotheses and development of theories. Theories are made to describe, explain, and predict phenomena in nature and to provide understanding of relationships between phenomena. Concepts must be operationalized in the form of propositional statements, thereby making measurement possible. Instrumentation, reliability, and validity are stressed in empirical research methodologies. Once measurement is determined, it is possible to test theories through experimentation or observation, which results in verification or falsification (Cull-Wilby & Pepin, 1987; Suppe & Jacox, 1985).

Positivism is often equated with empiricism. Like empiricism, positivism supports mechanistic, reductionist principles, where the complex can be best understood in terms of its basic components. Logical positivism was the dominant empirical philosophy of science between the 1880s and 1950s. Logical positivists recognized only the logical and empirical bases of science and stressed that there is no room for metaphysics, understanding, or meaning within the realm of science (Polifroni & Welch, 1999; Risjord, 2010). Logical positivism maintained that science is value free, independent of the scientist, and obtained using objective methods. The goal of science is to explain, predict, and control. Theories are either true or false, subject to empirical observation, and capable of being reduced to existing scientific theories (Rutty, 1998).

Contemporary Empiricism/Postpositivism

Positivism came under criticism in the 1960s when positivistic logic was deemed faulty (Rutty, 1998). An overreliance on strictly controlled experimentation in artificial settings produced results that indicated that much significant knowledge or information was missed. In recent years, scholars have determined that the positivist view of science is outdated and misleading in that it contributes to overfragmentation in knowledge and theory development (DiBartolo, 1998). It has been observed that positivistic analysis of theories is fundamentally defective due to insistence on analyzing the logically ideal, which results in findings that have little to do with reality. It was maintained that the context of discovery was artificial and that theories and explanations can be understood only within their discovery contexts (Suppe & Jacox, 1985). Also, scientific inquiry is inherently value laden, as even choosing what to investigate and/or what techniques to employ will reflect the values of the researcher.

The current generation of postpositivists accept the subjective nature of inquiry but still support rigor and objective study through quantitative research methods. Indeed, it has been observed that modern empiricists or postpositivists are concerned with explanation and prediction of complex phenomena, recognizing contextual variables (Powers & Knapp, 2011; Reed, 2008).

Nursing and Empiricism

As an emerging discipline, nursing has followed established disciplines (e.g., physiology) and the medical model in stressing logical positivism. Early nurse scientists embraced the importance of objectivity, control, fact, and measurement of smaller and smaller parts. Based on this influence, acceptable methods for knowledge generation in nursing have stressed traditional, orthodox, and preferably experimental methods.

Although positivism continues to heavily influence nursing science, that viewpoint has been challenged in recent years (Risjord, 2010). Consequently, postpositivism has become one of the most accepted contemporary worldviews in nursing.

Perceived View (Human Science, Phenomenology, Constructivism, Historicism)

In the late 1960s and early 1970s, several philosophers, including Kuhn, Feyerbend, and Toulmin, challenged the positivist view by arguing that the influence of history on science should be emphasized (Dahnke & Dreher, 2011). The perceived view of science, which may also be referred to as the interpretive view, includes phenomenology, constructivism, and historicism. The interpretive view recognizes that the perceptions of both the subject being studied and the researcher tend to de-emphasize reliance on strict control and experimentation in laboratory settings (Monti & Tingen, 1999).

The perceived view of science centers on descriptions that are derived from collectively lived experiences, interrelatedness, human interpretation, and learned reality, as opposed to artificially invented (i.e., laboratory-based) reality (Rutty, 1998). It is argued that the pursuit of knowledge and truth is naturally historical, contextual, and value laden. Thus, there is no single truth. Rather, knowledge is deemed true if it withstands practical tests of utility and reason (DiBartolo, 1998).

Phenomenology is the study of phenomena and emphasizes the appearance of things as opposed to the things themselves. In phenomenology, understanding is the goal of science, with the objective of recognizing the connection between one’s experience, values, and perspective. It maintains that each individual’s experience is unique, and there are many interpretations of reality. Inquiry begins with individuals and their experiences with phenomena. Perceptions, feelings, values, and the meanings that have come to be attached to things and events are the focus.

For social scientists, the constructivist approaches of the perceived view focus on understanding the actions of, and meaning to, individuals. What exists depends on what individuals perceive to exist. Knowledge is subjective and created by individuals. Thus, research methodology entails the investigation of the individual’s world (Wainwright, 1997). There is an emphasis on subjectivity, multiple truths, trends and patterns, discovery, description, and understanding.

Feminism and critical social theory may also be considered to be perceived view. These philosophical schools of thought recognize the influence of gender, culture, society, and shared history as being essential components of science (Riegel et al., 1992). Critical social theorists contend that reality is dynamic and shaped by social, political, cultural, economic, ethnic, and gender values (Streubert & Carpenter, 2011). Critical social theory and feminist theories will be described in more detail in Chapter 13 .

Nursing and Phenomenology/Constructivism/Historicism

Because they examine phenomena within context, phenomenology, as well as other perceived views of philosophy, are conducive to discovery and knowledge development inherent to nursing. Phenomenology is open, variable, and relativistic and based on human experience and personal interpretations. As such, it is an important, guiding paradigm for nursing practice theory and education (DiBartolo, 1998).

In nursing science, the dichotomy of philosophic thought between the received, empirical view of science and the perceived, interpretative view of science has persisted. This may have resulted, in part, because nursing draws heavily both from natural sciences (physiology, biology) and social sciences (psychology, sociology).

Postmodernism (Poststructuralism, Postcolonialism)

Postmodernism began in Europe in the 1960s as a social movement centered on a philosophy that rejects the notion of a single “truth.” Although it recognizes the value of science and scientific methods, postmodernism allows for multiple meanings of reality and multiple ways of knowing and interpreting reality (Hood, 2010; Reed, 1995). In postmodernism, knowledge is viewed as uncertain, contextual, and relative. Knowledge development moves from emphasis on identifying a truth or fact in research to discovering practical significance and relevance of research findings (Reed, 1995).

Similar or related constructs and worldviews found in the nursing literature include “deconstruction,” “postcolonialism,” and at times, feminist philosophies. In nursing, the postcolonial worldview can be connected to both feminism and critical theory, particularly when considering nursing’s historical reliance on medicine (Holmes, Roy, & Perron, 2008; Mackay, 2009; Racine, 2009).

Postmodernism has loosened the notions of what counts as knowledge development that have persisted among supporters of qualitative and quantitative research methods. Rather than focusing on a single research methodology, postmodernism promotes use of multiple methods for development of scientific understanding and incorporation of different ways to improve understanding of human nature (Hood, 2010; Meleis, 2012; Reed, 1995). Increasingly, in postmodernism, there is a consensus that synthesis of both research methods can be used at different times to serve different purposes (Hood, 2010; Meleis, 2012; Risjord, Dunbar, & Moloney, 2002).

Criticisms of postmodernism have been made and frequently relate to the perceived reluctance to address error in research. Taken to the extreme as Paley (2005) pointed out, when there is absence of strict control over methodology and interpretation of research, “nobody can ever be wrong about anything” (p. 107). Chinn and Kramer (2011) echoed the concerns by acknowledging that knowledge development should never be “sloppy.” Indeed, although application of various methods in research is legitimate and may be advantageous, research must still be carried out carefully and rigorously.

Nursing and Postmodernism

Postmodernism has been described as a dominant scientific theoretical paradigm in nursing in the late 20th century (Meleis, 2012). As the discipline matures, there has been recognition of the pluralistic nature of nursing and an enhanced understanding that the goal of research is to provide an integrative basis for nursing care (Walker & Avant, 2011).

In terms of scientific methodology, the attention is increasingly on combining multiple methods within a single research project (Chinn & Kramer, 2011). Postmodernism has helped dislodged the authority of a single research paradigm in nursing science by emphasizing the blending or integration of qualitative and quantitative research into a holistic, dynamic model to improve nursing practice. Table 1-3 compares the dominant philosophical views of science in nursing.

Table 1-3: Comparison of the Received, Perceived, and Postmodern Views of Science

Received View of Science—Hard Sciences

Perceived View of Science—Soft Sciences

Postmodernism, Poststructuralism, and Postcolonialism

Empiricism/positivism/logical positivism

Historicism/phenomenology

Macroanalysis

Reality/truth/facts considered acontextual (objective)

Reality/truth/facts considered in context (subjective)

Contextual meaning; narration

Deductive

Inductive

Contextual, political, and structural analysis

Reality/truth/facts considered ahistorical

Reality/truth/facts considered with regard to history

Reality/truth/facts considered with regard to history

Prediction and control

Description and understanding

Metanarrative analysis

One truth

Multiple truths

Different views

Validation and replication

Trends and patterns

Uncovering opposing views

Reductionism

Constructivism/holism

Macrorelationship; microstructures

Quantitative research methods

Qualitative research methods

Methodologic pluralism

Sources: Meleis (2012); Moody (1990).

Nursing Philosophy, Nursing Science, and Philosophy of Science in Nursing

The terms nursing philosophy , nursing science , and philosophy of science in nursing are sometimes used interchangeably. The differences, however, in the general meaning of these concepts are important to recognize.

Nursing Philosophy

Nursing philosophy has been described as “a statement of foundational and universal assumptions, beliefs and principles about the nature of knowledge and thought (epistemology) and about the nature of the entities represented in the metaparadigm (i.e., nursing practice and human health processes [ontology])” (Reed, 1995, p. 76). Nursing philosophy, then, refers to the belief system or worldview of the profession and provides perspectives for practice, scholarship, and research (Gortner, 1990).

No single dominant philosophy has prevailed in the discipline of nursing. Many nursing scholars and nursing theorists have written extensively in an attempt to identify the overriding belief system, but to date, none has been universally successful. Most would agree then that nursing is increasingly recognized as a “multiparadigm discipline” (Powers & Knapp, 2011, p. 129), in which using multiple perspectives or worldviews in a “unified” way is valuable and even necessary for knowledge development (Giuliano, Tyer-Viola, & Lopez, 2005).

Nursing Science

Barrett (2002) defined nursing science as “the substantive, discipline-specific knowledge that focuses on the human-universe-health process articulated in the nursing frameworks and theories” (p. 57). To develop and apply the discipline-specific knowledge, nursing science recognizes the relationships of human responses in health and illness and addresses biologic, behavioral, social, and cultural domains. The goal of nursing science is to represent the nature of nursing—to understand it, to explain it, and to use it for the benefit of humankind. It is nursing science that gives direction to the future generation of substantive nursing knowledge, and it is nursing science that provides the knowledge for all aspects of nursing (Barrett, 2002; Holzemer, 2007).

Philosophy of Science in Nursing

Philosophy of science in nursing helps to establish the meaning of science through an understanding and examination of nursing concepts, theories, laws, and aims as they relate to nursing practice. It seeks to understand truth; to describe nursing; to examine prediction and causality; to critically relate theories, models, and scientific systems; and to explore determinism and free will (Nyatanga, 2005; Polifroni & Welch, 1999).

Knowledge Development and Nursing Science

Development of nursing knowledge reflects the interface between nursing science and research. The ultimate purpose of knowledge development is to improve nursing practice. Approaches to knowledge development have three facets: ontology, epistemology, and methodology. Ontology refers to the study of being: what is or what exists. Epistemology refers to the study of knowledge or ways of knowing. Methodology is the means of acquiring knowledge (Powers & Knapp, 2011). The following sections discuss nursing epistemology and issues related to methods of acquiring knowledge.