Which is the fairest way to take a representative sample form a population? ensuring that every subject in the population has an equal chance to be selected.
Why is random sampling is preferred in psychological studies?
Random sampling is preferred in psychological studies because it increases the generalizability of a study. A randomly generated sample is less influenced by any researcher bias since the researcher is not selecting participants directly.
What are the purposes of an experiment is to determine whether the dependent variable affects the independent variable?
The purpose of the experiment is to observe the relationship between changes in the independent variable and changes in the dependent variable. If the dependent variable changes as a result of the changes in the independent variable then the researcher knows that the two variable has a relationship.
Is quota sampling mostly based on participant availability or volunteers?
Quota sampling is mostly based on participant availability or volunteers. A study done on the driving habits of motorists in 1925 will be generalizable to present-day motorists. One of the purposes of an experiment is to determine whether the dependent variable affects the independent variable.
Can a well designed experiment can be replicated by others?
True. A well-designed experiment can be replicated by others. It’s been proven that if an experiment is designed extremely well, to where people can see how it was designed, it can be replicated.
What is the best sampling method?
Simple random sampling: One of the best probability sampling techniques that helps in saving time and resources, is the Simple Random Sampling method. It is a reliable method of obtaining information where every single member of a population is chosen randomly, merely by chance.
What are the advantages and disadvantages of stratified sampling?
How do you manipulate independent variables?
Again, to manipulate an independent variable means to change its level systematically so that different groups of participants are exposed to different levels of that variable, or the same group of participants is exposed to different levels at different times.
What is the dependent variable in an experiment?
The dependent variable is the variable that is being measured or tested in an experiment. 1 For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants’ test scores, since that is what is being measured.
What are some examples of independent and dependent variables?
Independent variable causes an effect on the dependent variable. Example: How long you sleep (independent variable) affects your test score (dependent variable). This makes sense, but: Example: Your test score affects how long you sleep.
Which of the following is an example of convenience sample?
A convenience sample is a type of non-probability sampling method where the sample is taken from a group of people easy to contact or to reach. For example, standing at a mall or a grocery store and asking people to answer questions would be an example of a convenience sample.
What are the 4 types of non-probability sampling?
Common non-probability sampling methods include convenience sampling, voluntary response sampling, purposive sampling, snowball sampling, and quota sampling.
What is the strongest non-probability sampling?
Consecutive Sampling
This non-probability sampling technique can be considered as the best of all non-probability samples because it includes all subjects that are available that makes the sample a better representation of the entire population.
Does a well designed experiment need replication?
To improve the significance of an experimental result, replication, the repetition of an experiment on a large group of subjects, is required. If a treatment is truly effective, the long-term averaging effect of replication will reflect its experimental worth.
Is collecting research data the final step in the scientific method?
Collecting research data is the final step in the scientific method. A scientific theory must be supported with empirical evidence. Descriptive research attempts to explore cause-and-effect relationships by manipulating data.
Does a case study allow a more detailed look at the life of a single subject than any other study?
A case study allows a more detailed look at the life of a single subject than any other study. Qualitative research generally uses numbers to represent research data.