In a sample of 18, the correlation between intelligence test ...

[Mr.Thesaxman]

In a sample of 18, the correlation between intelligence test scores and creativity test scores was found to be .40 . Do these data provide evidence for a significant relationship between these variables in the population? Test at the .05 level of significance (two tailed). Table A5 shows a correlation of .4683 for 16 degrees of freedom.
 
  a. These data provide evidence of a significant relationship between intelligence and creativity.
  b. These data do not provide evidence of a significant relationship between intelligence and creativity.
  c. The significance of the relationship cannot be determined from the data given.

Question 2

Distinguish the Hawthorne effect from the John Henry effect in experimental research.
 
  What will be an ideal response?

[Jane]

Answer to Question 1

B

Answer to Question 2

Both are subject effects that threaten internal validity. The Hawthorne effect refers to the tendency for subjects in the experimental group to change their behavior because of the attention gained from participating in an experiment. The John Henry effect refers to the tendency of control group subjects who know they are in an experiment to exert extra effort and perform above their typical average.

[Mr.Thesaxman]

Thanks for the timely response, appreciate it

[ttt030911]

Gracias!