The single characteristic that all rating scales have in common ...

[Awilson837]

The single characteristic that all rating scales have in common is that
 
  a. the rater assigns a numerical value to the object, person, or thing being rated.
  b. the rater places that which is being rated somewhere on a continuum.
  c. the interval between any two points on the scale is always equal.

Question 2

A major problem with observational research is that
 
  a. it cannot be used with young children.
  b. only the simplest type of behavior can be observed.
  c. the presence of the observer may change the subject's behavior.
  d. no standardized instruments are available for use with observation.

[peter]

Answer to Question 1

B

Answer to Question 2

C

[Awilson837]

Gracias!

[lkanara2]

Excellent