While a study is in progress that is designed to analyze the effects of three types of assistive devices used by clients with Parkinson's disease when ambulating, a new walker is introduced to the market, and several of the subjects begin using the new walker. Based on this occurrence, which statement is accurate?
Because a selection bias has occurred, inferences made from the analysis of findings cannot be applied to the entire Parkinson's population at large.
Manipulation of the dependent variable poses a threat to the external validity of the study, so inferences from the study are applicable to the sample only.
A threat to the internal validity of the study has occurred because a factor outside those examined may have affected the outcome or dependent variable.
A measurement error has occurred, and a new sample should be obtained for the study using a double- blind approach to enhance randomization.
The Correct Answer is C
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
No explanation
Correct Answer is C
Explanation
Articles describing findings from peer-reviewed research studies are the most current and relevant source of information for the nursing staff who want to conduct a study aimed at reducing the rate of nosocomial infections on their unit. Peer-reviewed research studies are original investigations that have been evaluated and approved by experts in the field before publication. They provide the most reliable and valid evidence for nursing practice and research. They also help the nursing staff to identify gaps in knowledge, formulate research questions, design appropriate methods, and interpret results.
The other options are not correct because:
Medical-surgical nursing textbooks published within the past year may provide some general information about nosocomial infections and their prevention, but they are not the most current and relevant source of information for the nursing staff who want to conduct a study. Textbooks are often based on summaries of existing literature and may not reflect the latest evidence or innovations in practice. They also may not address the specific problem or population of interest for the nursing staff.
Hospital infection commitee meeting minutes from the past six months may provide some information about the current policies and procedures related to nosocomial infections in the hospital, but they are not the most current and relevant source of information for the nursing staff who want to conduct a study. Meeting minutes are often brief and incomplete records of discussions and decisions that may not capture the rationale or evidence behind them. They also may not address the specific problem or population of interest for the nursing staff.
Best practice recommendations from trusted professional webpages may provide some information about the current standards and guidelines for nosocomial infection prevention and control, but they are not the most current and relevant source of information for the nursing staff who want to conduct a study. Best practice recommendations are often based on systematic reviews or consensus statements that synthesize existing evidence and expert opinions. They may not reflect the most recent or emerging evidence or innovations in practice. They also may not address the specific problem or population of interest for the nursing staff.
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