The Experiments Pack Flashcards
what is a quasi experiment?
an experiment where the iv is naturally occurring
what is a repeated measures design?
a design that uses the same participants in each conditions
what is a independent measures design?
a design which uses different people for each condition
what is a matched participants design?
a design which uses different participants in each condition BUT an attempt is made to make the participants as similar as possible in key characteristics
a disadvantage of designs which use different participants in each conditions?
the experiment is vulnerable to more participant variables
what does a alternative hypothesis predict?
predicts that the iv WILL affect the dv
what does a null hypothesis predict?
that the iv will have no affect on the dv
what does a two tailed hypothesis predict?
predicts that the iv will have a significant effect on the dv, BUT does not predict the DIRECTION this effect will go in (e.g. rainy weather has a significant effect on peoples levels of happiness)
what does a one tailed hypothesis predict?
predicts that the iv will have a significant affect on the dv but ALSO the direction this effect will go in (e.g. rainy weather lowers happiness levels compared to sunny days)
what is operationalisation?
the process of making variables physically measurable or testable.
what type of sampling method is snowballing?
when participants are asked to contact friends and family to participate in the research.
