Operational definitions were used in the early work on ...

[lunatika]

Operational definitions were used in the early work on psychophysics, but they are rarely used today.
 
  Indicate whether the statement is true or false

Question 2

One general concern for within-subjects research is that participation in one treatment condition may influence an individual's scores in a later treatment condition. This creates a threat to internal validity known as order effects.
 
  a. True
  b. False
  Indicate whether the statement is true or false

[Ptupou85]

Answer to Question 1

F

Answer to Question 2

True

[lunatika]

Gracias!

[raenoj]

Excellent