History and Philosophy of Science – Nursing Notes

Foundational Context for Nursing Practice

Purpose: Establish a foundation for exploring whether scientific results reflect truth and how nurses should interpret scientific findings in practice. Source: McCrae (2011) p. 222.
Central claim: Nursing should be based on truth and the ability to interpret results of science; history and philosophy of science provide critical tools for evaluation and interpretation.

Definition: Rationalism is the view that regards REASON as the chief source and test of knowledge.
René Descartes (1596–1650)
- The first of the modern rationalists.
- Knowledge of eternal truths could be attained by reason alone; no experience was necessary.
- Foundational slogan: ext{Cogito ergo sum}
- In Latin: I think, therefore I am.
- Expressed as: ext{Cogito ergo sum} ext{— I think, therefore I am}. (Descartes)
- Emphasizes the primacy of a priori reasoning and deductive logic as the appropriate method for advancing knowledge.
A priori reasoning (deductive logic)
- Reasoning from cause to effect or from a generalization to a particular instance.
- Example: Lack of social support (cause) will result in hospital readmission (effect).
- Framework: theory → research strategy (theory–then–research): develop a theory first, then test via research.

Core claim: All knowledge is obtained through the senses; knowledge is not inherited.
Key statements
- Empiricism: all knowledge comes through the five senses.
- Basic empirical beliefs are those that arise directly from sensation.
Francis Bacon
- Popularized empiricism via inductive generalization from observed facts.
- Approach summarized as: research – then – theory (inductive method).
John Locke (1632–1704)
- All knowledge comes from sensation or from reflection.
Empiricism in nursing
- Important because nursing practice requires predictions and explanations; empiricism provides the capacity for explanation necessary for clinical practice.
a posteriori vs a priori (concepts)
- Concepts are said to be “a posteriori” (Latin: from the latter) if they depend on experience.
- Concepts are said to be “a priori” (Latin: from the former) if they can be applied independently of experience.
- Beliefs are a posteriori if knowable only via experience; a priori if knowable independently of experience.

Positivism (Comte) emerged as a dominant view of modern science.
Modern logical positivists believed empirical research and logical analysis (deductive and inductive) would yield scientific knowledge.
Propositions that affirm or deny something must be tested.

Deductive approach
- Steps (as described in the transcript):
- A social phenomenon is observed.
- A theory is developed to explain why it occurred.
- Data is collected on possible reasons and trends in the data are examined.
- The theory is tested through research; the theory is either accepted, rejected, or revised.
- A theory is developed from this data to explain the social phenomenon.
Inductive approach
- Data are collected and the theory is developed to explain the social phenomenon; theory evolves from observed data.
Summary of difference
- Inductive: specific observations lead to general theories.
- Deductive: start with general theory and test against specific cases.

Paul Michael Foucault (1973)
- Analyzed epistemology of the human sciences from the 17th to the 19th century.
- Claim: empirical knowledge was arranged in different patterns across cultures; humans were emerging as objects of study.
- Core idea: human knowledge and existence are profoundly historical; what is most human about man is his history.
- Context: discusses history, change, and historical method.
Alfred Schutz (1967)
- Focused on how people grasp the consciousness of others while living within their own streams of consciousness.
- Emphasized the lifeworld: people create social reality under constraints of preexisting social and cultural structures.
Edmund Husserl (1859–1938)
- Principal founder of phenomenology; philosophy of consciousness.
- Proposed suspending the “natural attitude” so philosophy can become its own science.
- Phenomenology as a science of consciousness rather than of empirical things.

Definition and aim
- A philosophical movement in the 20th century aimed at direct investigation and description of phenomena as consciously experienced.
- Focus on experience without theoretical causal explanations and with minimal unexamined presuppositions.
- Described as a philosophy of experience; a rigorous study of conscious experience.

Science as a process, not a product
- Emphasis on ongoing process of discovery and theory change over time rather than a fixed set of findings.
- Empiricists still focused on observation and data collection, but the emphasis shifted toward understanding how theories change and evolve.
New Epistemology
- Science viewed as an ongoing process, challenging the myth that science establishes final, ultimate truth.

Practical implications for nursing practice
- Recognize that scientific knowledge is not static; theory and practice co-evolve.
- Necessity of critical interpretation of results rather than blind acceptance of findings.
- Empiricism underpins clinical prediction and explanation, but phenomenology and lifeworld concepts remind us to consider patient experiences and social contexts.
Ethical and philosophical considerations
- The balance between rationalist confidence in reason and empiricist dependence on sensory experience.
- Awareness that knowledge is historically situated; what counts as truth can shift with culture and time (Foucault, Schutz).
Foundational principles to remember
- Distinction between a priori and a posteriori knowledge.
- Deductive vs inductive reasoning and how each informs research design.
- The view that science is a dynamic process, not a fixed product.

Rationalism: ext{Reason is the chief source and test of knowledge.}
Empiricism: ext{All knowledge comes through the senses (five senses).}
A priori: knowledge independent of experience; from the former.
A posteriori: knowledge dependent on experience; from the latter.
Cogito ergo sum: ext{I think, therefore I am}.
Inductive method: deriving generalizations from specific observations.
Deductive method: deriving specific conclusions from general theory.
Lifeworld (Schutz): the everyday world of lived experience through which social reality is constituted.
Phenomenology: science of conscious experience and description rather than causal explanation.
Positivism: scientific knowledge comes from empirical data and logical analysis; testable propositions.

Alligood, M.R. (2018). Nursing Theorists and Their Work, 9th edition. Elsevier: Singapore Pte Ltd.