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13 questions from this quiz
High external validity
Difficult replication due to lack of control
Extraneous variables may be less of a factor
Participant reactivity is removed
People may not want behaviours written down
Participants may change their behaviour
May lose objectivity
Maintain objective psychological distance
Numerical quantitative data
Greater risk of observer bias
Be exclusive & not overlap
When target behaviour happens infrequently
Behaviour sampled may be unrepresentative
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