controls: experimental methods

Question 1

Problem: Bias

Answer 1

• bias in research
• when researcher is designing experiment
• or collecting results

Question 2

Control: Randomisation - why

Answer 2

• where possible
• aspects of research should be random
• not decided by researcher
• as may be open to bias - could present EVs

Question 3

Control: Randomisation - how

Answer 3

• For example:
• when deciding order of conditions
• should be randomly generated
• by hat/computer
• so not decided by researcher

Question 4

Control: Standardisation - why

Answer 4

• important all ppt experience
• same environment and instructions
• to avoid EVs affecting measurements

Question 5

Control: Standardisation - how

Answer 5

• use same formalised instructions and procedures
• for all ppts (CONTEXT)
• including standardised instructions read out to all ppts
• and matching elements of task on difficulty