AO3 Flashcards
Strengths of independent groups (2)
-Order effects are not a problem (they are for repeated groups).
-Participants are less likely to guess the aim, less chance of demand characteristics.
Weakness of independant groups (1)
The participants who occupy the different groups are not the same in terms of participant variables. These differences may act as cofounding variables, reducing validity of findings
Strengths of repeated measures (2)
-Participant variables are controlled – higher validity.
-Fewer participants are needed, less time/effort recruiting them
Weakness of repeated measures (1)
Order effects apply as each participant has to do at least two tasks, the order ay be significant to the results
Counterbalancing
Attempt to control order effects ( half the participants do condition A, then B. The other half do condition B, then A.
Strengths of matched pairs (1)
Participants only take part in a single condition so order effects and demand characteristics are less of a problem
Weakness of matched pairs (1)
Less economical – is expensive and time-consuming, especially when pre-test is required
Strengths of lab experiments (3)
-High control over variables
-Easier to replicate
-Higher internal validity due to control over extraneous variables
Weakness of lab experiments (3)
-Lacks generalisability
-Demand characteristics
-Artificial tasks – lacks mundane realism
Strengths of field experiments (2)
-Higher mundane realism than lab
-Fewer demand characteristics
Weakness of field experiments (2)
-Loss of control over extraneous variables
-More difficult to establish cause and effect between IV and DV
Strengths of natural experiments (2)
-Unethical research can be done (eg Romanian Orphan Study)
-Natural behaviour in a natural environment – high external validity and mundane realism
Weakness of natural experiments (2)
-Event can happen very rarely or be a one-off occurrence – poor generalisability
-We cannot allocate participants to the conditions – risk of participant variables acting as extraneous or cofounding variables
Strengths of quasi experiments (1)
Highly controlled (like lab experiments)
Weakness of quasi experiments (1)
Cannot allocate participants randomly – risk of participant variables affecting results
Strengths of naturalistic observations (1)
High ecological validity - results can be generalised as behaviour is studied in an environment where it would normally occur
Weakness of naturalistic observations (1)
Lack of control over extraneous variables which means replication is difficult
Strengths of controlled observations (2)
Can be replicated easily due to standardised procedures. Findings can be checked to see if they occur again, easier to control extraneous variables
Weakness of controlled observations (1)
Lower external validity as behaviour may be contrived as a result of the setting
Strengths of covert observations (1)
Demand characteristics are reduced, and natural behaviour increases validity
Weakness of covert observations (1)
Unethical, no consent and may be invading privacy
Strengths of overt observations (1)
Ethical as participants are aware they’re being observed
Weakness of overt observations (1)
Knowledge of being studied influences behaviour – reduces internal validity
Strengths of non-participant observations (1)
Observer remains an objective distance so less chance of bias results