Research Applications Flashcards
What are the 8 steps in research?
- identify a relevant and important topic
- develop well considered research question
- research question leads to a hypothesis
- prepare research protocol
- organize materials and methods
- collect and analyze data
- study results and make decisions
- study designs and checklists
How do you identify a relevant and important topic?
review published research literature related to the topic
What is a well-considered research question?
who, what, how; clear, simple statement in a few words, in a complete grammatical statement
What is a hypothesis?
a prediction of a relationship
How is a hypothesis often expressed?
as more than or less than; not equal to
what is a null hypothesis?
no relationship in population of data; any difference is result of sampling error; often has equal to expressed
What does a research objective do?
defines the study’s purpose
A good hypothesis should be ___.
feasible, interesting, novel or innovative, ethical, and relevant
What is the PICO format?
population, intervention/exposure, comparison, and outcome
What is the research protocol?
methodology to solve the problem
What is PRISMA?
PRISMA randomized controlled trials: an evidence based minimum set of items for reporting in systematic reviews and meta analyses
What does PRISMA focus on?
reporting of reviews evaluating randomized trials, but can also be used as a bases for reporting systematic reviews of other types of research, particularly evaluations of interventions
What is MOOSE?
systematic review-observational MOOSE; meta-analysis of observational studies in epidemiology (MOOSE) group
List the parts of the research report.
- abstract
- general introduction
- review of existing literature
- methodology
- results
- discussion
- conclusions
- implications
What is an abstract?
condensation of final report; has purpose of study, questions asked, scope and method, summary of conclusions
What is included in the general introduction?
objectives, definitions, background, limitations, order of presentation
What is the review of existing literature?
a summary of different points of view
What is included in the methodology?
statement of hypothesis, discussion of methods used
**What is included in the results section of a research report?
specific lab, clinical, objective or subjective findings
What is the discussion section of a research report?
interpretation of results, comparison with other studies; may be combines with results
Which section of a research report may the discussion section be combined with?
the results section
What does discussing the results address?
the research question, objective, and hypothesis; places results in context with existing science
What are conclusions in a research report?
brief summary of results; may have recommendations
What are implications in a research report?
how the information might be applied in practice
What is descriptive research?
describes state of nature at a point in time; provides baseline data and monitors changes over time
Descriptive research generates hypotheses regarding what?
determinants of a condition or disease
Does descriptive research prove cause and effect?
no; it establishes associations among factors, but does not allow causal relationships to be determined
List the types of descriptive research.
qualitative, case report, surveys, correlation/ecological studies
What is the purpose of qualitative research?
to explore a phenomenon of interest as a prelude to theory development; often preceded other research
When does qualitative research take place?
it often precedes other research
How is data collected for qualitative research?
through interviews, observations, questionnaires; may use focus group (Delphi)
What is the Delphi method in research?
use of a focus group
What is a case report/study/series?
report of observations on one subject or more than one subject
What does a case report help to identify?
variables important to the etiology, care, or outcomes of a particular condition
What does a case report describe?
it describes quantitatively the experiences of a group of cases with a disease or a condition in common
What are surveys and how are they used?
research designed to describe and quantify characteristics of a defined population; defined time frame; pinpoints problems
What are correlation or ecological studies?
studies that compare frequency of events (or disease rates) in different populations with the per capita consumption of certain dietary factors (ex. correlation between fish consumption and breast cancer incidence)
What is analytical research?
tests hypothesis concerning the effects of specific factors of interest and allows causal associations to be determined (can prove cause and effect); includes clinical trials, follow-up studies, and case control studies
Can analytical research prove cause and effect?
yes
What are the types of analytical research?
experimental model, quasi experimental design, cohort studies, case control studies, and cross sectional studies
What is the experimental model?
uses experimental and control groups; target populations are randomly chosen to be in either group
What is randomization?
dividing people into treatment or control groups without bias
**Does the experimental or control group receive the treatment in the experimental model?
experimental group; control group does not receive the treatment but may receive a placebo
What is a placebo?
gives the aura but not the substance of a service, removing the possibility of the Hawthorne effect
What is the Hawthorne effect?
a positive response due to attention that participants receive
When is a program considered successful in an experimental model?
differences are computed between the two groups; successful if the experimental group has improved more than the control group
Why is the experimental model difficult to run?
- not enough people for the control group
- may not feel it is ethical to deny a service
**What is the quasi-experimental design?
time series- series of measurements at periodic intervals before the programs begins and after it ends; shows whether the measurements before and after a program ate a continuation of a previous pattern or whether they indicate a noteworthy change
What does the quasi-experimental design show?
whether the measurements before and after a program ate a continuation of a previous pattern or whether they indicate a noteworthy change
What is a cohort?
any group whose members have something in common
What are cohort studies?
group of people who have something in common are followed over time; ex. cohort of healthy people followed through time to see if they develop a specific disease
Cohort studies are also sometimes called ___?
incidence studies; they track the frequency of new cases (newly diagnosed) of a disease
??Define incidence?
??rate of newly diagnosed
??Define prevalence?
??total number of
Cohort studies are carried out over what period of time?
long period of time (longitudinal), and prospective (future oriented)
How are retrospective cohort studies conducted and what is looked for?
use existing data; look back for relationship between exposure factors and outcomes
What are case control studies?
focus on specific disease; those with the disease are compared with a group without the disease, but otherwise similar in characteristics; both groups recall past behaviors, to study how the groups differ
**What are cross-sectional studies/prevalence?
one time data collection counting all of the cases of a specific disease among a group of people at a particular time; **a snap-shot look at one point in time
What does a cross-sectional study/prevalence look at?
one point in time; describes current, not past or future events
What does IRB stand for?
institutional review board
The IRB is under ___.
FDA
What is the IRB?
a committee established to review and approve research involving human subjects, to ensure it is conducted within all ethical and federal guidelines
What are other names for the IRB?
(IEC) Independent Ethics Committee; (ERB) Ethical Review Board; (REB) Research Ethics Board
What is relevance or validity?
ability to measure phenomenon it intends to measure
**What is internal validity?
tests whether the difference between the two groups is real (has the experimental group really performed differently)
What is external validity?
tests whether or not a generalization can be made from the study to a larger population
**What is analysis of variance?
tool used to evaluate validity
**What does ANOVA stand for?
analysis of variance
**What does analysis of variance ask?
whether the difference between samples is a reliable one that would be repeated; are there one or more significant differences ANYWHERE among the samples?
**When is ANOVA used?
when several products compete against one another
**What does ANOVA compare?
the variance between groups with the variance within groups
What is reliability?
consistency or reproducibility of test results; test then retest later-are results similar?
What are parallel forms and how is reliability determined?
two separate but similar forms of the same test at the same time; reliability is determined by the degree to which the sets of scores coincide
What are split halves and how is reliability determined?
divide the test in half; reliability is determined by the degree of similarity of results
What is precision?
amount of variation that occurs randomly
Less random variation results in ___ precision in the measurement and ___ reliability.
greater; greater