2 - experimental design Flashcards

1
Q

list the three types of experimental design

A

independent groups, repeated measures and matched pairs

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2
Q

describe independent groups design

A

participants only perform in one conditions of the iv

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3
Q

how are order effects not being present a strength of independent groups

A

less likely to improve in performance due to repetition and familiarity and less likely to decrease in performance due to boredom or tiredness

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4
Q

how are participants being less likely
to guess the aims of the study a strength of independent groups

A

demands characteristics eliminated

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5
Q

how is no control over participants variables a weakness of independent groups

A

different abilities of participants in the various conditions can cause changes to the dv

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6
Q

how is participant amount a weakness of independent groups

A

you need more participants than other designs to gather the same amount of data

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7
Q

how do you solve uncontrolled participant variables in an independent groups design

A

random allocation, ensured that each participants has the same chance of being in one condition of the iv as another

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8
Q

describe repeated measures

A

the same participants take part in all conditions of the iv

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9
Q

how is eliminating participant variables a strength of repeated measures

A

different abilities of participants won’t make a difference across the conditions

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10
Q

how is fewer participants being needed a strength of repeated measures

A

so not as time consuming finding and using them

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11
Q

how are order effects a weakness of repeated measures

A

participants may perform better because of familiarity or perform worse because of boredom or tiredness

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12
Q

how do you solve order effects in repeated measures

A

counterbalancing, half of the participants do conditions in one order and the other half do it in the opposite order

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13
Q

describe matched pairs

A

pairs of participants are first matched on some variable that has been found to affect the dv, then one member of each pair does one condition and the other does another

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14
Q

how is no order effects a strength of matched pairs

A

not boredom or familiarity to change task performance

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15
Q

how are demand characteristics being less of a problem a strength of repeated measures

A

less likely to guess aims as only doing one condition

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16
Q

how is repeated measures being time consuming and expensive a weakness

A

have to match pairs

17
Q

how is the difficulty of matched pairs a weakness

A

a large pool of potential participants is needed which can be hard to get, also difficult to know which variables are appropriate for the participants to be matched