lab
' controlled and scientific exps. researcher is able to control all variables, except the IV which is manipulated.
+ scientific and controlled - extraneous variables can be minimised
+cause and effect - most confident the IV caused changes in DV
+replication - can be repeated and so reliabilty can be checked
- standardisation may creat DC - pps may respond to what they think is expected of them
-artificial - exp might not measure real life behaviour - low ecological val
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