Sampling
Surveys
Miscellaneous
Validity
miscellaneous
100
a precise scientific procedure for selecting research respondents
What is Random Sampling?
100
High response rates....Opportunity to observe...More expensive and time consuming
What is Face to Face surveys?
100
Used over experimental because of lack of feasibility
What is Quasi-Experimental?
100
The degree to which an effect observed in a dependent variable was actually caused by independent variable and not other factors
What is Internal validity?
100
when something in someones life makes them not act normal so it could effect the way they answer
What is statistical regression?
200
finding a few members to collect data from, then ask those individuals to provide information needed to locate others members of that population they happen to know.
What is Snowball Sampling?
200
Interviewer safety..less expensive & less time consuming..Interviewers physical appearance won't bias respondents...Unlisted numbers ..ease of hanging up
What are Telephone Surveys?
200
to see what works and what does not work to see what problems you will have. Before you spend to much time and money
Why do a pilot study?
200
The extent to which a causal relationship depicted in a study can be generalized beyond the study conditions
What is External Validity?
200
aware of being observed, can cause a bias behavior
What is an Obtrusive observation?
300
Is frequently used sampling method in social work because it is usually less expensive than other methods and because other methods may not be feasible for a particual type of study or population.
What is Convenience Sampling?
300
Largest samples....anonymity facilitates responses regarding sensitive areas....Representative neg. (poor and elderly)...high non-response rate
What is an Internet Surveys?
300
1. Involve staff during the setup 2. use treatment manuals 3. Make research staff available to agency staff during the study
How to avoid pitfalls in carrying out experiments is a social work agencies?
300
History....Maturation....testing
What are threats to internal validity?
300
the participant does not notice the observation
What is an Unobtrusive observations?
400
The difference between the true population parameter and the estimated population parameter
What is a Sampling error?
400
1. Not Clear 2. Double-Barreled 3. Questions in not relevant 4. Question is asked in the negative
What are four Common errors in survey questions?
400
1. Vested interests can impede the atmosphere for free, scientific inquiry 2. Evaluation may be done to favor vested interests 3. In-house vs. external evaluators
What are the politics of program evaluation?
400
If we use different measures of the dependent variables at post test than we did at pretest we cannot be sure of the results
What is a instrumentation change?
400
use by practitioners to monitor client progress of their own effectiveness more scientifically and systematically
What is a single case design study?
500
you select a sample based on your own judgement about which units are most representative or useful
What is Purposive Sampling or Judgmental?
500
Cheaper and quicker that interviews ...large samples..more expensive and time consuming than online surveys...lower response rate that face to face interviews
What is a mailed survey?
500
1. Cause (independent variable ) must precede the effect (dependent variable) in time 2. the two variables are empirically correlated with one another 3. the observed empirical correlation between the two variables can not be due to the influence of a third variable that causes the two under consideration
What is the criteria for inferring causality?
500
difference in comparing voluntary population to non-voluntary population
Selection biases??
500
enables researchers to generalize accurately from a segment of the population to the whole population. Use random sampling, random selection
What is probability sampling?
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