Experimental Design

An experimental design where participants take part in only one condition.

• Repeated measures

• Independent measures

• Matched pairs

Experimental design where participants take part in more than one condition

• Independent measures

• Repeated measures

• Matched pairs

Experimental design where people take part in only one condition but they have been carefully matched with another person in the other group based on any participant variables that might affect the DV (e.g. IQ, personality)

• independent measures

• repeated measures

• matched pairs

One problem with an independent measures design is that the internal validity can be hindered by....

• order effects

• participant variables

• sampling bias

• researcher expectancy

One problem with repeated measures is that the internal validity of the study can be affected by...

• participant variables

• order effects

• demand characteristics

• counterbalancing

One problem with the match pairs design is...

• order effects

• participants variables

• time consuming to set up

• the effects of randomisation

Counterbalancing is a way of overcoming

• participant variables

• order effects

• ABBA design

• randomisation

Random allocation to groups is away of overcoming

• order effects

• randomisation

• participant variables

• sampling bias

Randomisation is a way of overcoming ...

• Participant variables

• Order effects

• Sampling bias

• Researcher effects

Participants variables can affect the

• generalisability

• internal validity

• ecological validity

• reliability