research methods Flashcards
what is an extraneous variable?
a variable that has the potential to mess up ur research
what does ecological validity mean
true to life
what is demand characteristics
when your participants have worked out ur experiment and change their behaviour
what is a strength of lab experiment
-allows extraneous variables to be controlled so cause and effect can be established
-increase of reliability
what is a weakness of lab experiment
lacks ecological validity
increase of demand characteristics
strengths of field experiment
increase of ecological validity
decrease of demand characteristics
weakness of field experiment
increase of extraneous variables
decrease of reliability
strengths of quasi
could be unethical
increase of ecological validity
decrease of demand characteristics
weakness of quasi
-hard to establish cause and effect (as researcher has not directly manipulated IV)
-decrease of reliability
when would you write a one tailed hypothesis
when you feel confident about which way your results are going to go
when would you write a two tailed hypothesis
when you are not clear which way your results will go
what’s a null hypothesis
when you say there will be no correlation between the two variables
what is a repeated measures design?
same participants are used in both conditions
what is an independent measures design?
two different sets of participants used in the two conditions
what is a matched design?
two different groups of participants are used but they are matched up
what is an advantage of repeated design
because same participants are being used, any differences you see are not likely to be due to differences between participants
what is a disadvantage of repeated design
your research might be affected by order effects
demand characteristics can be more likely
what is an advantage of independent design
-participants only doing research once so results not effected by order effects
-decrease of demand characteristics
what is disadvantages of independent design
- people have different abilities (participant variables)
advantage of matched design
-decrease of order effects
-decrease of demand characteristics
disadvantage of matched design
-costly and time consuming
-reduces participant variables
what is a participant observation
-the researcher becomes part of the group they are studying
-this type of observation often be naturalistic and unstructured
what is a non participant observation
researcher just observes without becoming part of the group
what is an overt observation
participants are aware they’re being studied
what is a covert observation
participants unaware they’re being studied