![]() |
Creado por Charlotte Hewson
hace más de 9 años
|
|
Pregunta | Respuesta |
describe a repeated measures design | all participants do every condition |
describe an independent groups design | participant allocated to a group. each group takes part in one condition |
describe matched pairs design | pairs of participants are matched on key variables (e.g. age, gender, intelligence) one member of each pair is under one condition, the other members do the other condition |
what are 2 limitations of repeated measures? | -order effects -more likely to guess the aim |
how would an order effect change results? | they may do better through practice, or worse through boredom/tiredness |
what may participants guessing the aim lead to? | altered behaviour, this then affects the validity of the results |
what are 2 limitations of independent groups? | -lack of control over participant variables -more participants are needed than in repeated measures |
what do participant variables act as? | extraneous variables |
how can this be prevented? | random allocation |
how many more participants are needed for independent measures design? | twice as many |
what ae two limitations of matched pairs? | -time consuming -cant control all participant variables |
why is it so time consuming? | must start with very large group and sort through to find sufficiently matched participants |
why cant you control all participant variables? | the potential list is too long |
what do these uncontrolled variables act as? | extraneous variables |
what is counterbalancing? | each condition is tested first or second in equal amounts |
what are the two ways to do this? | some participants do condition A then condition B other participants do condition B then condition B |
what is the other way to do this? | ABBA design. all participants are tested 4 times |
what happens in a single blind trial? | participants re 'blind' to the aims of the study. they may be given a cover story to stop them guessing the aim. |
what happens in a double blind trial? | both the participants and researcher are 'blind' to the aims of the study. |
what does a double blind trial reduce? | experimenter effects |
¿Quieres crear tus propias Fichas gratiscon GoConqr? Más información.