Research Methodogy - RESEARCH METHODOLOGY IN BIOSCIENCES...

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RESEARCH RESEARCH METHODOLOGY IN METHODOLOGY IN BIOSCIENCES BIOSCIENCES Dr. V. Jagadeesan Dr. V. Jagadeesan Deputy Director (Sr. Gr.) (Retd) Deputy Director (Sr. Gr.) (Retd) National Institute of Nutrition National Institute of Nutrition
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Introduction HUMAN BEINGS ARE THE UNIQUE PRODUCT OF THEIR CREATION AND EVOLUTION. CURIOSITY IS INBORN TO KNOW ALL ABOUT YOU AND AROUND YOU ORDERLINESS IN UNVERSE AND CERTAIN CAUSE AND EFFECTS CONFLICT WITH AUTHORITIES. ONLY WHEN PEOPLE BEGAN TO THINK SYSTEMATICALLY ABOUT THINKING ITSELF THAT THE ERA OF LOGIC BEGAN.
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First Systematic Approach to Reasoning Attributed to Aristotle DEDUCTIVE METHOD A Logical Relationship between: A Major Premise (Self evident assumption) A Minor Premise (Particular case related to Major Premise) A Conclusion (The relationship between the above two – inescapable) This deductive method is good at problem solving but not fruitful in arriving at new truths. Further acceptance of false or incomplete premises based on old dogmas or authority could lead to error. - Major Premise – All Men are Mortal - Minor Premise – Socrates is a man - Socrates is Mortal
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Inductive Reasoning Direct observation of phenomena, arriving at conclusions or generalisation through the evidence of many individual observations. DEDUCTIVE - Already accepted dogmas - May be flawed INDUCTIVE - New observations - Discovery of new truths
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Deductive Method of Aristotle Inductive Method of Bacon Fully Integrated in the work of Charles Darwin. How does man develop from his ancestors? Natural selection explains the origin of different species of animals. In other words Struggle for Existence Survival of the fittest The evidence gathered confirmed the hypothesis that biological change in the process of natural selection in which favourable variations were preserved & unfavourable ones were destroyed, resulted in formation of the NEW SPECIES.
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Hypothesis The major premise of the older deductive method was gradually replaced by an assumption or HYPOTHESIS that was subsequently tested by the collection and logical analysis of data. This DEDUCTIVE INDUCTIVE method is now recognised as an example of a scientific approach.
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Hypothesis Vs. Theory A hypothesis is formulated before facts are gathered It deals with a narrow range of ideas It is a preliminary assumption adopted for explanation of a phenomena A theory on the other hand is after verification & it deals with a broad range of facts. It is the source of further hypotheses
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Science The first level of a theory is the formation of a Hypothesis. The theory developer has a hunch based on previous experience, observations / information gained from others. A hypothesis is formulated in such a way that this hunch can be tested.
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This note was uploaded on 10/07/2010 for the course DBT 456 taught by Professor Ss during the Spring '10 term at Indian Institute of Technology, Guwahati.

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Research Methodogy - RESEARCH METHODOLOGY IN BIOSCIENCES...

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