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Author Question: Which type of study should be used when data are collected at only one point in time? a. ... (Read 34 times)

cool

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on: Jul 8, 2018
Which type of study should be used when data are collected at only one point in time?
 
  a. Cross-sectional
  b. Retrospective
  c. Longitudinal
  d. Prospective

Question 2

What threat to internal validity is most closely associated with a longitudinal design?
 
  a. Instrumentation effects
  b. Mortality effects
  c. History effects
  d. Selection bias


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phuda

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Reply #1 on: Jul 8, 2018
Answer to Question 1

ANS: A

Feedback
A Cross-sectional design is associated with data collection at one point in time.
B Retrospective design is analysis of data that has already been collected.
C Longitudinal design involves data collection over a specific period.
D Prospective design involves data collection over time into the future.

Answer to Question 2

ANS: B

Feedback
A Instrumentation effects or testing effects can occur in many types of research design and are not more likely in longitudinal design.
B A major disadvantage of longitudinal design is loss of research subjects.
C History effects can occur in any kind of research design.
D Selection bias is due to problems with sampling processes rather than design issues.


cool

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Reply 2 on: Jul 8, 2018
YES! Correct, THANKS for helping me on my review

kishoreddi

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Reply 3 on: Yesterday
Wow, this really help

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