EBIR

Question 1

Name 3 types of graphs that are good for displaying continous data.

Answer 1

• Histogram
• Box Whisker Plots
• Scatter Plot

Question 2

What type of graph is good for comparing categorical data?

Answer 2

Bar chart

Question 3

How should tables and graphs be presented properly

Answer 3

• Well Labeled
• Not Busy
• Complete Title
• Can Stand Alone
• Minimal Jargon or Acronyms
• 2-D format for graphs

Question 4

What is the counterfactual Theory?

Answer 4

It is the “ideal” comparison in a research project. It attempts to exclude all variables except those that are controlled by the investigator. This is an impossible ideal because not everything can be controlled or excluded.

Question 5

What is randomization in research?

What are the benefits of randomization?

Answer 5

• Exposure to a new drugs, device, behavioral modification, etc. is choosen at random. It is not the same thing as blinding.
• It minmizes the probability of bias in the experiement, but does not eliminate it.
• It facilitates blinding

Question 6

Name 3 differnt types of randomization methods employed in research?

Answer 6

1. Simple Randomization - the exposure is choosen at random. Like a coin toss.
2. Blocked Randomization - the exposure is a simple randomization, but within a a set block or quanitty (ie- 20 person block).
3. Permuted Block randomization - similar to block randomization, but the block size is also randomly assigned.

Question 7

What is blinding in research?

What are single, double, and triple blinded experiements?

Answer 7

Blinding is when you keep participants, investigators, or assesors unaware of an assigned intervention, so that they are not effected by that knowledge.

• Single - Only participants blinded
• Double - Participants, Investigators, Assessors Blinded, but not anaylsts
• Triple - Everyone blinded (best option, if possible)