Design Of Experiments 2

Question 1

What are standardised instructions

Answer 1

-participants are given exact the same info at start of study (applies to non-experimental methods)

Question 2

Repeated measure design

Answer 2

-order effects could bias results, when participants improve/get worse at a task as they complete two or more conditions

Question 3

How to avoid order effects

Answer 3

Counterbalancing

-order of conditions is balanced so participants do not all complete the conditions in the same order as each other

Question 4

Independent groups design

Answer 4

• doesn’t suffer from order effects as participants only complete one condition
• suffer from participant variables (differences), can affect outcome
• to minimise this, randomly allocate participants to different conditions of experiment

Question 5

Matched pairs design

Answer 5

• advantage, specific participant variables are controlled for matching them up
• disadvantage, TIME CONSUMING and doesn’t control all EVs

Question 6

Ethical procedures

Answer 6

• INFORMED CONSENT, for children, parental consent is necessary
• right to withdraw
• debriefing then at end of study
• data must be confidential

Question 7

What is seen as unethical

Answer 7

-deception because participants haven’t given their informed consent to take part