Sampling

Question 1

Explain what volunteer sampling is

Answer 1

-When participants self-select to join a study

Question 2

Explain what opportunity sampling is

Answer 2

• When participants are randomly selected/asked
  
  • (anyone willing/available)
• at the time of the study

Question 3

Explain what random sampling is

Answer 3

• When participants are random. selected from pop.

- Everyone has an equal chance

Question 4

Explain what stratified sampling is

Answer 4

-When participants are selected to match the proportion of people subgroups(?)

Question 5

Strengths(volunteer)

Answer 5

• No researcher bias

- Minimal effort

Question 6

Strengths(random)

Answer 6

-Unbiased selection(no researcher bias)

Question 7

Strengths(stratified)

Answer 7

-More representative of TP

(random selection from identified stratas)

Question 8

Strengths(volunteer)

Answer 8

• No researcher bias
• Minimal effort
• Large range of possible participants

Question 9

Strengths (opportunity)

Answer 9

• Inexpensive
• Relatively quick
• Practical

Question 10

Strengths(random)

Answer 10

-Unbiased selection(no researcher bias)

Question 11

Weaknesses(volunteer)

Answer 11

• ppl who volunteer might share sim. characteristics

e. g: people very motivated or ppl very helful

Question 12

Weaknesses(opportunity)

Answer 12

-Unconscious bias

only part of target pop.

Question 13

Weaknesses(random)

Answer 13

• Time consuming

- very hard to gather full list of ppl

Question 14

Weaknesses(Stratified)

Answer 14

• Cannot reflect ALL diff.

- Bias in select. impt. diff