This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why is instrumentation a potential threat to validity in a time-series design? A) When ... (Read 65 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
on: Aug 4, 2018
Why is instrumentation a potential threat to validity in a time-series design?
 
  A) When participants take the same measures over and over again, they tend to get better at them.
  B) When people initiate new approaches or programs, there also may be accompanying changes in the way records are made and kept.
  C) The more times something is measured, the less reliable it is.
  D) When a study is carried out over a long period of time, participants tend to drop out or leave.

Question 2

What is the term used for the potential confounding variable in a time-series study in which the measuring procedures may be inadvertently changed over time?
 
  A) measurement error
  B) history
  C) instrumentation
  D) attrition


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

SVictor

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Aug 4, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: C


cnetterville

  • Hero Member
  • *****
  • Posts: 547
Reply #2 on: Aug 4, 2018
Thank you!


SVictor

  • Sr. Member
  • ****
  • Posts: 365
Reply #3 on: Aug 4, 2018
Always glad to help...


« previous next »
 

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Tracking time of marker entry generates a chromosome map Tracking time of marker entry generates a chromosome map
Having a time zone map located near the telephone will assist you when making long distance calls ou Having a time zone map located near the telephone will assist you when making long distance calls ou
Accumulation of toxicants over time and up the food chain Accumulation of toxicants over time and up the food chain
The low-elevation coastal zone in Bangladesh is under threat of inundation by 2100 The low-elevation coastal zone in Bangladesh is under threat of inundation by 2100
Middle adults usually have more time to focus attention on their relationships Middle adults usually have more time to focus attention on their relationships
Disitive Time For Meat Disitive Time For Meat
Video: Mendel's Principles of Dominance, Segregation and Independent Assortment

For a complete list of videos, visit our video library