reliability validity, addressing limitations Flashcards
(10 cards)
validity
the degree to which a measurement tool evaluetes what it is designed to measure
reliability
the degree to which a measurement tool produces consistent results
addressing limitations
extraneous variables
-use random allocation (elimentate experimenter effect)
-monitor variables to ensure they are controlled
-use standarised instructions and procedures
-conduct the experiemt in a controlled environment
not knowing if the IV influenced the DV
-use a control group (comparison for the experimenter group)
addressing limitatatins
confoudning variable
-control EV so they do not develop into confounding variable
addressing limitations
demand characteristics
-use placebo
-eliminate experimenter effect
-use single blinf procedure so participants dont know which conditions theyre exposed to
-use deception
addressing limitations
experimenter effects
-instead of single blind procedure, use double blind procedure’-use sampling technique involving the least amount of researcher bias, such as stratified sampling
addressing limitations
low reliability
-use measurement tools that have been emperically measured to show they collect reliable results
-replicate the study and carefully analyseit to detect and reduce random errors
addressing limitations
low validity
-control EV
-improve measurement techniques
-use a single or double blind procedure
-include a control group
-use random allocation when placing participants into control and experimental groups
sample is not able to be genrealised to the population
-use stratified sampling method rather than convenience sampling
-use same number of participants in each group
-use random allocation when placing participants into control and experimental groups
-make sure participants dont know which group theyre in
-EV need to be controlled
