types of experiments Flashcards

1
Q

experiments

A

All experiments involve a change in the IV and the effect on the DV is recorded/measured.

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2
Q

lab experiment

A

high controlled environments.

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3
Q

stengths of lab ex

A

high control over confounding variables and extraneous variables, internal val.

replication more possible bc high level of control, no extraneous variables not introduced when repeating.
valid not one- off.

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4
Q

limitations of lab ex

A

lack generalisability, artificial settin doesnt reflect life, ppts behave unusually in unfamiliar contexts, low external validity

aware tested in lab, demand charateristics.

tasks may be artificial, low mundane realism

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5
Q

field experiment

A

IV manipulated in natural setting.

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6
Q

strength of field ex

A

higher mundane realism, environment natural, valid results, high ex validity.

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7
Q

limitation of field ex

A

loss of control over CV and EV, cause and effect between IV and DV more difficult to establish, precise replication not possible

ethical issues, unaware so cant consent to being studied, invasion of privacy.

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8
Q

natural experiment

A

Researcher measures effect of IV on DV but has no control over IV and cannot change it. setting may not be natural, DV may be naturally occurring.

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9
Q

strength natural ex

A

provide opportunitiesfor research that may not otherwise be taken for practical/ethical reasons.
eg romanian orphan studies

high external validity.

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10
Q

limitations of natural ex

A

naturally occuring events happen rarely, reducing opportunities, limit scope for generalising findings to similar sitches

ppts not randomly allocated to experimental conditions, less sure if IV affected DV.

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11
Q

quasi- experiment

A

have an IV based on existing difference between people (age or gender), not manipulated, simply exists.
dv naturally occuring,

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12
Q

strength quasi experiment

A

controlled conditions, replication high.

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13
Q

negative quasi ex

A

cant randomly allocate ppts, confounding variables.

IV not deliberatley changed by researcher, cannot claim Iv caused observed change.

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