week 8 Flashcards
what are the 2 types of intervention quantitivative research designs?
- experimental: clinical study with randomization and control group
- quasi-experimental: clinical study without randomization, control group
describe what experimental designs are and what they are used for
they serve to evaluate the effects of a treatment/intervention by using at least 2 groups one which is a control and the other experimental in which the poeple are randomly assignined to the thr groups, this is to estabilish a cause and effect relationship
what is single and double blinding and what is the rosenthal effect vs hawthrone in experimental design
blinding refers to the participants (single) or the reseacrhers and participants (double) being blinded in who is having treatment and who is having the placebo
The rosenthal effect is bias from research expectations and hawthorne is from participants expectations
what are the three types of experimental designs
- pretest-postest design:
- crossover design
- factorial design
define pretest-postest design:
measurments are taken before and after intervtion
what is cross over design
Each participant experiences both the intervention and control conditions in a random order. To prevent the interventions from affecting the result of the following treatment there is a washout period so a period without treatment
what is factorial design
Examines the effects of more than one independent variable. this is used to test the combined action of the indepent variables on the dependent variables
what are the strengths and weaknesses of experimental designs
strengths= used for cause and effetc, better control of enviroment, methods and measurements, potential effect of confounding variable
weaknesses= artifical enviroment, different behaviours beccause of the setting, sample size small and follow up period limited
what are the 2 quasi experimental designs]
- nonequivalent control group design:measurements before and after an intervention without randomization.
- interupted time series design: repeated measumrents with expermintal group with or without control group without randominzation with insertion of an experimental treatment between 2 series of measuements
what are the strengths and weaknesses of qausi experimental designs
strengths= manipulation of independent variable makes it possible to measure changes in the dependent variable, better control of enviorment and methods
weaknesses= no randomization so its possible to have differences between groups which can lead to counfounding variables, more difficult to determine cause and effect
what are mixed research designs?
Incorporates elements of both qualitative and quantitative research methods to provide a more comprehensive understanding of a research problem.
What are the types of mixed designs (sequential)
- explantory: collection of quantitative data followed by qualitoative data to allow for better understanding of quantitive results
- expoloratory: collecting qualitiative data followed by quantitivae data to indetify themes and enrich information in a more systemic way
- transformative: approach aimed at promoting social justice and change.ts primary goals include driving social reform, empowering these groups, and proposing actionable solutions to dismantle inequalities.
whats the difference between mixed designs sequential and concurrent
sequential is data collected sequentially and concurrent is data collected all at once
- what are the types of concurrent mixed designs
. triangulated: quantitivate and qualitative data collected simultaneous to indentify similarities and differences
2. embedded: quantitivate and qualitative data collected simultaneous but there is a predominance of one method
3. transformative
