Module 3 Quiz

A researcher administers a scale measuring self-confidence and one measuring self-doubt to a group of subjects and performs a correlational analysis of the results. This is a test of validity from:

divergent validity

A researcher develops a new instrument to measure coping skills and conducts a pilot study to compare the new tool with an existing tool that measures this concept. This is an example of evidence of validity from:

Convergent validity

In a pilot study to help train a group of data collectors who will evaluate children's pain using a FACES rating scale, the researcher examines the reliability of the scores of each data collector. This is an example of which type of reliability measure?

Interrater reliability

What is the purpose of completing a pilot study?

It helps identify problems the researcher might encounter while collecting data.

Why are convenience samples used so frequently in nursing research, when a random sample would allow for greater generalizability?

Nurses are limited to the populations they serve; many populations are small and difficult to access.

A researcher evaluates whether a tool addresses the major elements of the construct being studied. This helps to ensure:

content validity

To improve consistency in data collection the researcher should:

request that subjects record their blood pressure at the same time each day.

A researcher attempted to recruit all 150 of the patients seen in the emergency department in a three-month period for diverticulitis, but only 120 consented to participate. What is the sample size?

120

A researcher consented 75 subjects, but 15 dropped out of the study while it was still in progress. What was the sample attrition rate?

20%

An outpatient being treated in the infusion center for thalassemia is asked to fill out a form about satisfaction with the center, while he waits for his appointment. The form consists of five questions, each a statement, with six possibilities after it: Strongly Agree, Agree, Slightly Agree, Slightly Disagree, Disagree, and Strongly Disagree. This is an example of which of the following?

A Likert scale

Which of the following constructs would be appropriate to measure with a visual analogue scale?

Anxiety

A researcher performs a series of pilot studies to evaluate whether a measurement tool produces consistent results. This is an evaluation of:

Reliability

"To be considered eligible for the study, subjects had to be older than 21 years of age, hold a valid state driver's license, and be able to fire a shotgun." This is an example of which of the following?

Sampling criteria

Which of the following is NOT a physiological measures?

Score on the Mini Mental Status Exam

Using a table of random numbers, the sample of 400 subjects was selected from the list of the license numbers of all registered nurses in the state of Michigan. Each nurse was sent a letter requesting completion of an online survey on workplace bullying. This is an example of what type of sampling method?

Simple random sampling

A researcher is studying the effect of hypnosis on pain experienced during dental procedures. The researcher's study has two groups: those who receive hypnosis during the procedure and those who receive no hypnosis. If the researcher plans to use a t-test for the statistical analysis, which would be the best way to measure pain for this study?

numerical pain scale with a range from 0 to 100

The quantitative researcher collects many pieces of quantitative data as words, not numbers. Prior to statistical analysis, all of the data pieces must be coded. What does this mean?

The data are transformed into numerals corresponding to words, such as 0—no college degree, 1—bachelor's degree, 2—master's degree, 3—PhD or EdD.

A researcher studying depression in relation to five predictor variables decides to include five more variables in the study because the literature reveals that they may also be involved in depression. Consequently, the researcher will do which of the following?

Use a larger sample size.

A researcher develops a 7-point Likert scale to evaluate feelings of well-being in patients who are undergoing chemotherapy. The researcher administers this measure to other, similar patients in several medical centers. This is done in order to:

improve the test-retest reliability

A researcher evaluates scores of a paper and pencil instrument with variables at the interval level of data using the Cronbach's alpha coefficient statistical procedure. This is a test of:

internal consistency reliability