The _______________ scale is a unipolar scale, typically ...

[SAVANNAHHOOPER23]

The _______________ scale is a unipolar scale, typically 10-point, with rating scales from +5 to -5.
 a. rank-order c. semantic differential
  b. paired-comparison d. Stapel

Question 2

When a potential respondent ____, he or she gives permission to receive selected e-mail, such as questionnaires, from a company with an Internet presence.
 a. becomes part of an unrestricted sample
  b. consents
  c. opts in
  d. subscribes

[courtney_bruh]

Answer to Question 1

D
Stapel scales are a modification of semantic differential scales, usually using endpoints of +5 and -5.

Answer to Question 2

C