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Research Design
 
Replication <ul><li>Repetition  of the basic experiment </li></ul><ul><li>See if units  respond the same way  to the same ...
Randomization <ul><li>Chance assignment of experimental units to the treatment or vice-versa </li></ul><ul><li>Assures val...
Local control <ul><li>Balancing grouping and blocking of experimental units in the experimental design </li></ul><ul><li>B...
 
 
5 12 8 14 15 4 10 11 2 3 9 13 1 7 6 <ul><li>Control </li></ul>1% 5% 10% + Control 8 9 13 1 5 12 3 11 2 8 6 14 4 7 10
 
Block Experimental Subjects A B C 1 2 3 7 6 8 11 12 13 4 5 9 10 14 15 <ul><li>Control </li></ul>1% 5% 10% + Control 1 4 2 ...
Group Exercise <ul><li>Identify dependent, independent, and extraneous variables. </li></ul><ul><li>Enumerate the treatmen...
Group Exercise <ul><li>Groups 1 and 2 – Comparative analysis of the effects of VCO and olive oil on the cholesterol levels...
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Research Design

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Transcript of "Research Design"

  1. 1. Research Design
  2. 3. Replication <ul><li>Repetition of the basic experiment </li></ul><ul><li>See if units respond the same way to the same treatment </li></ul><ul><li>Significance of the results can be tested </li></ul><ul><li>Number of replicates depends on </li></ul><ul><ul><li>Degree of precision required </li></ul></ul><ul><ul><li>Degree of homogeneity of the sample </li></ul></ul><ul><ul><li>Number of treatments in the study </li></ul></ul>
  3. 4. Randomization <ul><li>Chance assignment of experimental units to the treatment or vice-versa </li></ul><ul><li>Assures valid and unbiased estimates of means and differences between treatments </li></ul><ul><li>Test for significance is valid </li></ul>
  4. 5. Local control <ul><li>Balancing grouping and blocking of experimental units in the experimental design </li></ul><ul><li>Blocking – assignment of units to a block to ensure that the block is homogeneous </li></ul>
  5. 8. 5 12 8 14 15 4 10 11 2 3 9 13 1 7 6 <ul><li>Control </li></ul>1% 5% 10% + Control 8 9 13 1 5 12 3 11 2 8 6 14 4 7 10
  6. 10. Block Experimental Subjects A B C 1 2 3 7 6 8 11 12 13 4 5 9 10 14 15 <ul><li>Control </li></ul>1% 5% 10% + Control 1 4 2 3 5 9 8 7 6 10 14 15 13 12 11
  7. 11. Group Exercise <ul><li>Identify dependent, independent, and extraneous variables. </li></ul><ul><li>Enumerate the treatments given. </li></ul><ul><li>How many replicates were used? </li></ul><ul><li>How many samples were used in the project? How were these chosen from the population? </li></ul><ul><li>Which type of research design (CRD or RCBD) was chosen or was most appropriate for the project. Why? </li></ul><ul><li>Bonus: What was the test of significance used? </li></ul>
  8. 12. Group Exercise <ul><li>Groups 1 and 2 – Comparative analysis of the effects of VCO and olive oil on the cholesterol levels in rabbits </li></ul><ul><li>Groups 3 and 4 – Utilization of blood of stray dogs as a component of blood agar plates </li></ul><ul><li>Groups 5 and 6 – Formulation of an all-organic nutrient solution for lettuce </li></ul><ul><li>Groups 7 and 8 – Mango seed kernels as an alternative source of starch in flour </li></ul><ul><li>Groups 9 and 10 – Lecithin organogels as a topical aid of green tea extracts for the treatment of inflammatory skin disease </li></ul>
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