Research Flashcards
Purpose of Research
Explore for new knowledge or verify existing knowledge. It is accomplished in a systematic way with standardized, formal procedures.
Steps of Research
- Problem formulation: Hypotheses that lend themselves to measurement.
- Study design: Guides collection of data.
- Methodology: Including measurement of techniques, setting, population
- Data Collection:
- Analysis of Results
- Dissemination of results
Independent variables
Sometimes referred to as the explanatory variables, are those which “cause” the dependent variable to change in some way.
Dependent variables
sometimes referred to as the response variable, the variable which is caused to change by the independent variable. It responds to the independent variable.
Intervening Variable
those factors which in some way moderate(increase or decrease) the effect of the independent variable on the dependent variable.
Research Design and Related Measurement Strategies:
Quasi-experimental design:
Always has 2 or more groups being studied, each of which receives different treatment options or no treatment. If there is a treatment group and a no treatment group, the no treatment group is called the control group or the comparison group. Used in agencies Uses pre-test post-test measurement strategy:
Pretest Treat. int posttest
Group 1: X1 O1 X1
Group 2: X2 O2 X2
Research Design and Related Measurement Strategies:
Single Subject Design
consists of a variety of methods of research used to evaluate the effectiveness of a treatment intervention with 1 client or 1 client system. Single subject design research is the most useful type of design for evaluating private practice. uses ABAB measurement strategy:
Baseline Intervention Baseline
A B A
Other ie; ABAB ABACA
Sampling Strategies
A sample is taken from a total population to represent that population.
- Probability sample: participants are randomly selected; every individual considered for the study has an equal opportunity to be included in the sample to be studied.
- Non-probability sample: sample of convenience. that is, whoever is available and willing to participate in the study. Snowball sample.
Statistics:
- Correlation coefficient (“r” stands for coefficient): Numerical index indicating degree to which 2 variables are associated with each other.
The closer an r value gets to 1, the stronger the association. Strong correlation= largest number close to either +1
Weakest correlation= smallest number close to zero - Chi Square X 2 power, or t test. Could be student t-test.
Measurement issues:
Reliability
Consistency in the measurement of a variable (Test Retest)
Measurement issues:
Validity
Internal validity: The confidence with which we can say that a relationship exists between variables.
External validity: How valid the results are for other populations; some times referred to as “generalizability”.
Ethical issues in research
- Informed consent
- Voluntary participation
- Confidentiality
- Do no harm
Program Evaluation:
What is it?
The systematic application of research methods in assessing the planning, implementation, and utility of social intervention programs.
Program Evaluation:
Needs Assessment
Verify that the problem exists. A need assessment is essential to identify the target population of the intended program or existing program.
Program Evaluation:Needs assessment
Targets
The subject of the evaluation, may be individual, groups, geographically and politically related areas or physical units (houses, roads)
1- Population at risk- segment of the population that is likely to develop a condition.
2- Population at Need- group of potential targets who currently have the condition
3- Incidence- number of new cases of a problem that are identified or arise during a specified time.
4- prevalence- refers to # of existing cases at a specific time.