PLANNING RESEARCH

What is a null hypothesis

states there will be no difference

What is an alternative hypothesis

states there will be a difference

What is an independent variable

the thing that is manipulated

What is a dependent variable

the thing that is measured

What is an extraneous variable

the thing that effects the outcome of study if not controlled

What is a repeated measures design

same participants

What is an advantage of repeated measures design

less cost, no participant variables

What is a positive of repeated measures design

risk of order effects

What is an independent measures design

participants take part in only one condition

What is an advantage of independent measures design

no order effects

What is a positive of independent measures design

participant variables could affect experiment, more time and cost

What is a random sample

everyone in target population have same chance of being picked

What is an opportunity sample

participants are picked because they're convenient

What is a self selected sample

participants volunteer

What is an advantage of random sample

no bias, representative

What is an advantage of opportunity sample

quick and cheap

What is an advantage of self selected sample

ethical as no pressure

What is an disadvantage of random sample

time consuming, risk of freak sample

What is an disadvantage of opportunity sample

unrepresentative, bias, narrow range of people

What is an disadvantage of self selected sample

unrepresentative as certain type of people volunteer

What is an example of random sample

names from hat

What is an example of opportunity sample

picked in a location known to researcher

What is an example of self selected sample

responding to ads

Explain lack of informed consent

participants should agree to being studied and should know why

Explain protection from harm

participants should be protected from psychological and physical harm

Explain deception

participants know exactly what they're getting into

Explain use of debriefing

If participants have been deceived they can be told in a debriefing, apologised to and give the right to withdraw data

Explain right to withdraw

should be made clear to participants that they can leave experiment at any part of it

Explain confidentiality

participants data should be kept anonymous if they want to

Describe debriefing

a convo between researches and participants that happens at end of a study