Which statement most accurately describes the relationship between reliability and validity of a measurement instrument?
1. A measure cannot be reliable unless it is valid.
2. As reliability increases, validity decreases.
3. A measure cannot be valid unless it is reliable.
4. As validity increases reliability decreases.
3
Rationale 1: The reliability of an instrument tells nothing about the degree of validity. An instrument can be very reliable, but have low validity.
Rationale 2: There is no evidence that increasing reliability decreases validity.
Rationale 3: Reliability of a measure is always considered first because reliability is a necessary condition for validity. An instrument cannot be valid unless it is reliable.
Rationale 4: There is no evidence that increasing validity decreases reliability.
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A client is being evaluated for a stroke. The nurse knows that one of the easiest and most common diagnostic tests used to differentiate between strokes is:
1. computed tomography (CT). 2. magnetic resonance imaging (MRI). 3. electrocardiography (EEG). 4. positron emission tomography (PET).
A client has a central nervous system disorder. The nurse realizes that the client may be experiencing alterations in hormones regulated by which of the following organs?
1. Hypothalamus 2. Pineal gland 3. Pituitary gland 4. Thyroid
When caring for a patient at the end of life, the nurse decides which therapies to continue based on whether the intervention will: Note: Credit will be given only if all correct choices and no incorrect choices are selected
Select all that apply. 1. Keep the family happy. 2. Reduce the workload of the staff. 3. Enhance the patient's functional status. 4. Lessen the patient's emotional, psychological, or spiritual distress. 5. Promote relief of the patient's symptoms.