(no subject)
Qualitative research
-experimients
-survey research
Qualitative Field Research
-participant observation
-enthnomethodology
-focus grouops
-Ethnography
unobtrusive research
-
Experimental Design
1. allows control over extraneous variables
2. allows manipulation of independant variable (a strength)
3. yeilds "precise" measurment
4. Scientifically rigorus
5. most popular during american sociology "Age of scientism" (1930's)
best design for explanatory research and making inferences about causality.
Classical design of an experiment
experimental group: Dependent variable Y/Stimulus (X)/dependant variable Y
control group: dependent variable/dependant variable
experiment tests the hypothesis x->y
There are standard symbols used to describe experimental designs: \
O - an observation or measurement Y
X - the treatment or independant variable
R - random assignment of conditions
symbols are written to show time sequence:
OXO
Pretest/Posttest Comparison
Yardstick for assessing whether X->Y is a comparison of the pretest scores or measures with the posttest
variation in the dependent variable (y) produced by the independent variable (X) is known as experimental variability. this is what is of interest in experiments
variation in the dependent variable can occur for may reasons OTHER than the impact of the independent variable. hence, we want to control for that possibility
posttest/posttest comparison
another yardstick for assessing whether x->Y is comparing the posttests of the experimental and control groups
The experimental and control group must be equivalent
ways to establish equivalency
1. matching
2. random assignment
different types of experimental designs:
1. pre-experimental designs
2. quasi-experimental designs
3. true or "pure" experimental designs
-experimients
-survey research
Qualitative Field Research
-participant observation
-enthnomethodology
-focus grouops
-Ethnography
unobtrusive research
-
Experimental Design
1. allows control over extraneous variables
2. allows manipulation of independant variable (a strength)
3. yeilds "precise" measurment
4. Scientifically rigorus
5. most popular during american sociology "Age of scientism" (1930's)
best design for explanatory research and making inferences about causality.
Classical design of an experiment
experimental group: Dependent variable Y/Stimulus (X)/dependant variable Y
control group: dependent variable/dependant variable
experiment tests the hypothesis x->y
There are standard symbols used to describe experimental designs: \
O - an observation or measurement Y
X - the treatment or independant variable
R - random assignment of conditions
symbols are written to show time sequence:
OXO
Pretest/Posttest Comparison
Yardstick for assessing whether X->Y is a comparison of the pretest scores or measures with the posttest
variation in the dependent variable (y) produced by the independent variable (X) is known as experimental variability. this is what is of interest in experiments
variation in the dependent variable can occur for may reasons OTHER than the impact of the independent variable. hence, we want to control for that possibility
posttest/posttest comparison
another yardstick for assessing whether x->Y is comparing the posttests of the experimental and control groups
The experimental and control group must be equivalent
ways to establish equivalency
1. matching
2. random assignment
different types of experimental designs:
1. pre-experimental designs
2. quasi-experimental designs
3. true or "pure" experimental designs