Up to Sampling

True or false, random allocation is impossible in laboratory experiments.

• True

• False

Which of these is a key feature of a quasi experiment...

• The study controls the independent variable

• The study measures the independent variable

• Participants can't be randomly allocated to a group

• The study takes place in a natural environment

Oscar asks one group to drink a cup of coffee for 30 minutes before completing a recall task, the other group drinks nothing. The operationalised dependent variable is...

• Drink (coffee or no coffee)

• Coffee or no coffee

• Recall task

• % score on recall task

Denise gives her participants a word recall test in the morning and then the same participants an image recall test in the afternoon. Which experimental design has she used?

• Lab experiment

• Quasi experiment

• Independent measures

• Repeated measures

Paul wanted to test participants recall of words in a silent condition and in a music condition, using a matched pairs design, which variable is most appropriate to match them on?

• Their GCSE scores

• Their gender

• Their favourite pet

• The type of phone they have

Paul is going to run the music condition experiment and his friend is going to run the silent condition, what does Paul need to do to make sure all the participants have the same experience?

• Use standardised instructions

• Make sure the task has experimental realism

• Counterbalance the tasks

• Randomly allocate the participants

Reorder the following...

• Continue picking names out of the hat until you have 20 names for the first condition.

• Repeat this with condition 2, picking another 20 names

• Write all the names on to separate bits of paper and put them into a hat

• Pick out one name out of the hat and allocate it to condition 1.

Counterbalancing...

• ensures the experiment is more realistic

• reduces order effects

• spreads order effects evenly over all groups

• requires some participants to do condition A then B and the other half to do condition B then A.

A population is...

• The participants you use in the experiment

• Representative

• Generalisable

• The people you take your sample from