Experiments Flashcards

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1
Q

What is an independent variable ?

A

Independent variable is the the one that changes and has a direct effect

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2
Q

What is the dependent variable ?

A

It is the one that you measure

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3
Q

What is the extraneous variable ?

A

Variables that aren’t the independent variable but could effect the results therefore need to be controlled

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4
Q

What is a cofounding variable ?

A

Any variable that is not controlled by the researchers that could ruin the results

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5
Q

Definition of a laboratory experiment ?

A

Conducted under highly controlled conditions

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6
Q

Strengths of laboratory experiments ?

A

Easy to replicate

Precise control over iv , ev

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7
Q

Weaknesses of laboratory experiments ?

A

Low ecological validity

Demand characteristics may cause bias results

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8
Q

Definition of a field experiment ?

A

Done in every day environments

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9
Q

Strengths of field experiments ?

A

Natural behaviour

Less demand characteristics

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10
Q

Weaknesses of field experiments ?

A

Less control over ev

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11
Q

Definition of quasi experiment ?

A

In a natural environment with a naturally occurring IV

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12
Q

Strengths of quasi experiments ?

A

Natural behaviour

Less demand characteristics

Can be used in situations which it would be ethically unacceptable to manipulate the iv

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13
Q

Weaknesses of quasi experiments ?

A

Time consuming

No control over iv and ev

Hard to establish relationship between iv and dv

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14
Q

Definition of independent measures design ?

A

Different participants are used in each condition

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15
Q

Strengths of independent measures design ?

A

No order effects as more than one group

Less chance of demand characteristics by guessing aims

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16
Q

Weaknesses of independent measures design ?

A

Individual differences

Needs more participants

17
Q

Definition of repeated measures design ?

A

Same participants do each condition

18
Q

Strengths of repeated measures design ?

A

Smaller number of participants

No individual differences

19
Q

Weaknesses of repeated measures design

A

Order effects

More chance of demand characteristics

20
Q

Definition of a matched pairs design ?

A

Different participants in different conditions but you match them on certain variables such as age and gender etc

21
Q

Strengths of matched pairs design ?

A

No order effects

Less chance of demand characteristics

22
Q

Weaknesses of matched pairs design ?

A

A few individual differences

More participants