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

Author Question: Bell et al. (2000) found that people who are more physically fit suffer athletic injuries less often ... (Read 30 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
on: Jun 20, 2018
Bell et al. (2000) found that people who are more physically fit suffer athletic injuries less often than people who are less fit. This threat to internal validity that keeps us from concluding that fitness is a causal variable is
 
  a. selection.
  b. maturation.
  c. statistical regression.
  d. history.

Question 2

Many decades ago, psychologists discovered that comparisons of young and old people revealed that cognitive functioning declined in old age when cross-sectional research was used. The same result did not appear with longitudinal research.
 
  The problem here is that the results in the cross-sectional research were affected by
  a. cohort effects.
  b. baseline effects.
  c. wave effects.
  d. trend effects.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

alexanderhamilton

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jun 20, 2018
Answer to Question 1

A

Answer to Question 2

A


plus1

  • Hero Member
  • *****
  • Posts: 676
Reply #2 on: Jun 20, 2018
Thank you


alexanderhamilton

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jun 20, 2018
No problem :)


« previous next »
 

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

A recent study found that female baboons that groom each other are more likely to come to each other A recent study found that female baboons that groom each other are more likely to come to each other
Bell’s palsy. Bell’s palsy.
The gaping hole in the destroyer USS Cole, in the port of Aden, Yemen, was the work of suicide bombe The gaping hole in the destroyer USS Cole, in the port of Aden, Yemen, was the work of suicide bombe
L. Frank Baum, author of The Wonderful Wizard of Oz (1900) and a fan of William Jennings Bryan, perh L. Frank Baum, author of The Wonderful Wizard of Oz (1900) and a fan of William Jennings Bryan, perh
Unhappy people Unhappy people
Do you see animals or people first? Do you see animals or people first?
Video: Primary Active Transport - electrochemical gradient and ion transport / water movement

For a complete list of videos, visit our video library