experimental design/EV’s

Two different groups of participants that only take part in one condition each

Independent groups

The same participants take part in both conditions

Repeated measures

Participants only take part in one condition but there is another participant in the other condition which have similar characteristics E.G intelligence

Matched pairs

What are order effects?

When participants that are in both conditions either perform better in the second condition because they know what to do or worse because they’re tired/board

Which experimental design does order effects happen in?

Repeated measures

What is the solution to order effects?

Counterbalancing

What is counterbalancing?

When half of the participants do condition A then condition B and the other half of participants do condition B their condition A (ABBA)

What are demand characteristics

Doing both conditions, participants may guess the aim of study and either do better or worse performance

What is participant variables?

There may be a difference between the participants rather than the Ivy itself

What experiment design does participant variables happen in?

Independent groups

What is the solution to participant variables?

Random allocation

What is random allocation?

When participants around me allocated to one of the two conditions researchers could put names in the hat and pick them to put in a condition

What are situational variables?

These are things such as temperature noise level or difficulty which may influence the DV which are not the IV

What are investigator effects?

When investigating influence how participants do in the study such as gesture towards the right answer

What is a double blind procedure?

When the participant and the person conducting the experiment does not know the aim of the investigation

What is a single blind procedure?

When the participants have no idea which condition of the study they are in

What is randomisation?

When the investigator can’t control how the investigation is conducted such as order of the words in a memory test

What is standardisation?

The way the procedure is conducted should be exactly the same for every time the investigation is conducted