Assignment 3: Reliability and Validity
in Research Instruments
Score: 92.31 out of 100 - CORRECT ANSWER
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. - CORRECT ANSWER Convergent validity
A researcher performs a series of pilot studies to evaluate whether a measurement
tool produces consistent results. - CORRECT ANSWER Reliability
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 other medical centers. - CORRECT ANSWER
Reliability
In a research study, ambulatory clinic nurses teach children with asthma how to
monitor peak expiratory flow volumes and how to use metered-dose inhalers to
determine whether asthma control scores improve. The researcher discovers
inconsistencies in how these measures were taught and how well the children
understood the concepts. - CORRECT ANSWER Intervention fidelity
A researcher reviews demographic characteristics of potential study subjects, such
as age and gender, to determine whether these characteristics may influence the
outcome of the study. - CORRECT ANSWER Internal validity
A researcher conducts a quasi-experimental study to determine whether there is
improved weight gain among premature infants who are fed according to cue-based
protocols. The researcher trained neonatal intensive care nurses to apply cue-based
feeding to orally fed infants and notes a statistical difference in weight gain
between infants fed according to cue-based protocols and those fed according to
standard protocols. The reviewer notes that parents who gave consent to
participate in the study were from a higher socioeconomic class than the population
as a whole. This is a threat to: - CORRECT ANSWER External validity
A researcher uses only one method of measurement to assess depression in older
adults living in an assisted living facility. - CORRECT ANSWER Mono-operation bias
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. - CORRECT ANSWER Interrater 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. -
CORRECT ANSWER Internal Consistency reliability
A researcher evaluates whether a tool addresses the major elements of the
construct being studied. - CORRECT ANSWER Content validity
