Sampling & Notes from Tutorial w/ Amy

Self-Selected sampling

Think volunteers/ads! People who sign up are usually pretty motivated but this may lead to a sample that isn't representative of target population

Opportunity sampling

Very convenient, easy to get participants because they are readily available. However, the groups often tend to be homogeneous and not representative of target population

Random sampling

Everyone in the target population has the same probability of being chosen (random number generators) but you put another name after drawing a name

Purposive sampling

Looking for people with a very specific set of traits (Taiwanese mothers who have lived in the U.S for 15 years)

Snowball sampling

Networking, when you look for partcipants from a specific group that would not respond to an ad in a paper (those engaged in illegal activites, domestic violence) think trustworthy if one friend recommends the researcher then the entire group does

Stratified sampling

Makes a sample that reflects the sub-groups within a target population (percentages but w/ diff total amounts of people)

Ethics: CARDUD!

Consent

Anonymity

Right to withdraw

Debriefing

Undue stress/harm

Deception

what do we talk about for quantitative?

we talk abt validity, generalizability, and reliability

validity

did you measure what you think you measured? 

• your DV act captured the thing you were trying to capture

generalizability

if something is valid and reliable, we should be able to generalize it to some extent

• i.e. this is gonna happen if the 15 people i tested on were a different set of 15 people

• however, it is possible to have a valid and reliable study and it isn’t generalizable, this is usually because of demographics

reliability

will the same thing happen again every time i measured it? is it repeatable? can someone else study it and find the same thing?

qualitative research

transferability and credibility

we’re talking about these people in this specific situation. we’re not thinking about causes or correlation but rather experiences (like specific lebanese child survivors of the war)

transferability

the extent to which findings, themes, or therapeutic techniques from one study can be applied to other similar situations/populations

credibility

a measure of trust in the study stemming from quality of the method used, understanding of context, accuracy, reasonability, ethics, and integrity of the researchers

triangulation

When we triangulate, we check a result against another result. It’s  a way to increase the credibility of a study