1) which study design is particularly useful for
increasing the proportion of the study participants who adhere to
the intervention and follow-up procedures?
a. run-in design
b. group randomization
2) in which of the following study designs is the
effect of sample size smaller than the number of individual
participants and power diminished?
a. randomized matched paired design
b. group randomization
3) what type of matching is where the distribution of
the potential confounder is determined for the case group and
controls are selected to match this frequency distribution?
a. frequency matching
b. propensity score matching
1) Run-in design is particularly useful for increasing the proportion of the study participants who adhere to the intervention and follow-up procedures. Option a is the correct answer.
2) Group randomization study designs are the effect of sample size smaller than the number of individual participants and power diminished. Option b is the correct answer.
3) Propensity score matching is where the distribution of the potential confounder is determined for the case group and controls are selected to match this frequency distribution. Option b is the correct answer.
1) which study design is particularly useful for increasing the proportion of the study participants who...
1-Which of the following alternative explanations should be ruled in order to consider a study valid? a-Bias b-Confounding c-Random error d-All of the above 2-Which of the following defines confounding? a-An error committed by the investigator either in the design or conduct of study that leads to a false association between the exposure and disease b-A natural mixing of effects between an exposure, an outcome, and a third extraneous variable c-A result of false association between the exposure and disease...
contrasting a repeated measures research design with matched
subjects and independent measures designs
A graduate student is interested in whether journaling can affect grief and healing. She has participants who have been widowed within the past 10-14 months complete a battery of psychological questionnaires before and after journaling about their daily problems for 2 months. The first time the graduate student conducted this study, she used a repeated-measures design and compared the widows' and widowers' baseline scores with their scores...
> Researchers found 400 current smokers to volunteer for a study in which each was randomly assigned to one of three treatment groups Group 1 received an electronic cigarette (e-cig) in which each cartridge contained 72 mg of nicotine, Group 2 received an e-cig that contained 5.4 mg of nicotine, and Group 3 received an e-cig that contained no nicotine. The subjects did not know which group they were assigned. During the course of the intervention, subjects dropped out of...
6. Typically, when comparing a within-subjects design to a between-groups design which of the following describe their differences in error variance? a. Within-subjects designs results in less error variance than between-groups. b. A within-subjects design results in more error variance than a between-groups design. C. A within-subjects design results in the same amount of error variance as a between-groups design d. There is no error variance in a within-subjects design, whereas a between- groups design does present some error variance....
1. Researchers study the impact of internalized bias on patient care. Nurses complete a survey which determines a score for their internalized bias from 0-100. Without knowing the internalized bias score, patients are asked to rank the subsequent care they receive from the nurse as poor, fair, good or exemplary. In this study your independent variable is measured at what level of measurement? Ratio Ordinal Nominal Interval 2. A study examines the relationship between interpersonal violence and health in women....
16) Which group would be considered a vulnerable population, according to traditional guidelines? a) College students b) Patients in a dialysis clinic c) Patients in a prison hospital d) Patients in an outpatient rehabilitation facility 17) Which constitutes an ethical transgression? a) Failing to obtain a Certificate of Confidentiality b) Not collecting data anonymously c) Breaching confidentiality d) Not performing a risk/benefit assessment 18) In the following clinical question, which PICO component is the health promotion program? “Does a nurse-led...
please just select the correct answer no explanation needed 1) An RCT could use all of the following designs, except a: a) randomized pretest–posttest design. b) crossover design. c) randomized posttest-only design. d) nonequivalent control group design. 2) A meta-analyst addressed the question of whether mindfulness-based interventions were effective in reducing anxiety in patients with cancer and found high levels of statistical heterogeneity (i.e., significant variation of effects across studies). What should the meta-analyst do? a) Use a random effects...
RARATCHATA found 500 ant amokars to volunteer for A study in which AACH WAR Andy A had to an ofitran traalrem UDA Group 1 recated an electric algata which mach carriga contained 72 mg of nicotina Group 2 racaved an Ad that are 5.4 mg af nicotine, and Group 9 received an e-ciguat contained no ricoline. The subjecte did no n which group they were assigned. During the course of the interieron subjecte cropped out of the study. At the...
1. We reject the null hypothesis only when: a. our sample mean is larger than the population mean. b. the p value associated with our test statistic is greater than the significance level of the test we have chosen. c. our sample mean is smaller than the population mean. d. the p value associated with our test statistic is smaller than the significance level of the test we have chosen. 2. In a study of simulated juror decision making, researchers...
(1) State the type of research design used in the Schultz et al. report. (2) State the elements or characteristics of this type of design used in the Schultz report (see textbook for designs). (3) Does the research design fit with the research purpose? Provide rationale as to why or why not. (4) What is the dependent variable and independent variable? (5) Is there a conceptual model/framework described in the report? If yes, describe briefly in a few sentences the...