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Threats to Construct Validity
Terms in this set (4)
Attention and Contact with Clinets
The intervention may have exerted its influence because of the attention provided, rather than because of special characteristics unique to to the intervention.
Expectancies for improvement generated by placebos can also be a threat to the relation of the intervention and the results.
Single Operations & Narrow Stimulus Sampling
Experimental manipulation or intervention includes features that the investigator considers irrelevant but may have been responsible for the results. ie. the difference between therapists competence in administering the drug rather than the difference in drug.
expectations on the part of the experimenter may plausibly serve as a source of ambiguity and threaten the construct validity of the experiment.
Not likely threat because there are more parsimonious interpretations than expectancies that can be invoked.
Cues of the Experimental Situation
sources of influence such as information conveyed to prospective subjects prior to their arrival to the experiment that the investigator can mistakenly attribute to the experimental manipulation.
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