PSYC 226 Ch 5, 2.13.12

PSYC 226 Ch 5, 2.13.12 - Selecting Research Participants...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Selecting  Research  Participants Chapter 5 PSYC 226
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Representative Sample A faculty member in the Psychology Department  posts notices in classrooms and buildings on  campus, asking for volunteers to participate in a  human memory experiment. Interested students  are asked to leave their names and telephone  numbers. What sampling method is used? What are some ways in which this sample might be  biased (as compared to the general population)?
Background image of page 2
Sample Size Large samples tend to be more representative  than small samples Law of large numbers: the more participants  you have, the more likely your sample is to  reflect the population Researchers must balance this principle with  the demands of recruiting and testing many  participants
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sample Size Considerations include: Recruiting methods (flyers,  newspaper/TV/radio ads, etc.) Research burden on participants (how  intensive is their participation?) Incentives (what is the cost of providing an  incentive for participants?) There is no set “sample size” requirement – it  is different for every study!
Background image of page 4
Sampling  Sampling: the process of selecting individuals  for a study There are many different sampling methods Aka sampling techniques Aka sampling procedures
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sampling Methods Probability sampling:  The odds of selecting a particular individual  are known and can be calculated. You must know the EXACT number of people  in your population for this method!
Background image of page 6
Sampling Methods 3 requirements for probability sampling: The exact size of the population is known and 
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

PSYC 226 Ch 5, 2.13.12 - Selecting Research Participants...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online