SPCE 630 Midterm WITH 100%
ACCURATE SOLUTIONS
Threats !to !internal !validity !include: !- !correct !Answers !✔✔ !-History, !maturation, !testing, !procedural !
infidelity, !testing, !instrumentation, !selection !bias, !multiple !treatment !interference, !data !instability, !
cycliccal !variability, !regression !to !the !mean, !adaptation, !Hawthorne !effect
History: !- !correct !Answers !✔✔ !-Events !that !occur !during !the !experiment !but !that !are !not !related !
to !the !planned !procedural !changes !that !may !influence !the !outcomes
Maturation !- !correct !Answers !✔✔ !-Changes !in !behavior !due !to !the !passage !of !time.
Testing !- !correct !Answers !✔✔ !-Occurs !when !participants !need !to !respond !to !the !same !test !
repeatedly !during !a !baseline !or !probe !condition, !which !influences !responding.
Instrumentation !- !correct !Answers !✔✔ !-Threats !related !to !the !measurement !system, !and !are !of !
concern !because !of !repeated !measurement !by !human !observers !who !may !make !errors.
Procedural !Infidelity !- !correct !Answers !✔✔ !-Inconsistent !implementation !of !the !experimental !
condition.
Attrition !- !correct !Answers !✔✔ !-The !loss !of !participants !during !a !study, !which !limits !the !generality
!of !findings.
Multiple !Treatment !Interference !- !correct !Answers !✔✔ !-Occurs !when !a !participant's !behavior !is !
influenced !by !more !than !one !planned !intervention !during !the !course !of !a !study
Cyclical !Variability !- !correct !Answers !✔✔ !-A !type !of !data !instability !that !refers !to !a !repeated !and !
predictable !pattern !in !the !data !series !over !time.
Sequential !confounding: !- !correct !Answers !✔✔ !--May !influence !the !participants' !responding !based !
on !the !order !in !which !the !experimental !conditions !are !introduced !to !participants.
-Can !be !controlled !by !counterbalancing.
ACCURATE SOLUTIONS
Threats !to !internal !validity !include: !- !correct !Answers !✔✔ !-History, !maturation, !testing, !procedural !
infidelity, !testing, !instrumentation, !selection !bias, !multiple !treatment !interference, !data !instability, !
cycliccal !variability, !regression !to !the !mean, !adaptation, !Hawthorne !effect
History: !- !correct !Answers !✔✔ !-Events !that !occur !during !the !experiment !but !that !are !not !related !
to !the !planned !procedural !changes !that !may !influence !the !outcomes
Maturation !- !correct !Answers !✔✔ !-Changes !in !behavior !due !to !the !passage !of !time.
Testing !- !correct !Answers !✔✔ !-Occurs !when !participants !need !to !respond !to !the !same !test !
repeatedly !during !a !baseline !or !probe !condition, !which !influences !responding.
Instrumentation !- !correct !Answers !✔✔ !-Threats !related !to !the !measurement !system, !and !are !of !
concern !because !of !repeated !measurement !by !human !observers !who !may !make !errors.
Procedural !Infidelity !- !correct !Answers !✔✔ !-Inconsistent !implementation !of !the !experimental !
condition.
Attrition !- !correct !Answers !✔✔ !-The !loss !of !participants !during !a !study, !which !limits !the !generality
!of !findings.
Multiple !Treatment !Interference !- !correct !Answers !✔✔ !-Occurs !when !a !participant's !behavior !is !
influenced !by !more !than !one !planned !intervention !during !the !course !of !a !study
Cyclical !Variability !- !correct !Answers !✔✔ !-A !type !of !data !instability !that !refers !to !a !repeated !and !
predictable !pattern !in !the !data !series !over !time.
Sequential !confounding: !- !correct !Answers !✔✔ !--May !influence !the !participants' !responding !based !
on !the !order !in !which !the !experimental !conditions !are !introduced !to !participants.
-Can !be !controlled !by !counterbalancing.
