After defining the key terms of a new study, the researcher is thinking about writing operational ...

After defining the key terms of a new study, the researcher is thinking about writing operational definitions. What should the researcher consider about these terms? Standard Text: Select all that apply.
 
  1. Because key terms have been defined, operational definitions are not necessary.
  2. Key terms are usually the same as operational definitions.
  3. Operational definitions are necessary to indicate what was observable about study variables.
  4. Measurability is a key feature of operational definitions.
  5. It is important that operational definitions reflect the theoretical framework.