Different participants are used in the different conditions.
What is a strength of independent measures designs?
Participants only take part in one condition. This is a strength as it avoids order effects such as performing better from practice or performing worse due to boredom.
What is a strength of independent measures design?
It takes less time as both groups can be tested at the same time.
Less demand characteristics.
What is a weakness of independent measures design?
Participants are not studied in relation to other participants, individual differences are not taken into account. This is a weakness as differences between two or more participants may affect results, e.g., age or gender.