Chapter 4 Ledford Flashcards
replication
an investigator’s ability to repeat the effect an independent variable has on the dependent variable
3 primary reasons for attempting to replicate the findings of a study
- assess the reliability of findings (internal validity)
- assess the generality of findings (external validity)
- look for exceptions
direct replication
replication of an experiment by the same experimenter
two types of direct replications
- intra-participant direct replication
- inter-participant direct replication
sequential introduction and withdrawal designs
include the repetition of the A-B comparison with a single participant
time lagged designs
include the repetition of A-B comparison across a set of three or more participants, behaviors, or contexts
rapid iterative alternation designs
include the repetition of A-B comparison with single session replication and comparisons
direct intra-participant replication (intra-subject)
repeating the experimental effect with the same participant more than once in the same study
inter-participant direct replication (inter-subject)
repeating the experimental effect with different participants
variables to consider in determining whether three replications are an adequate number
- baseline data stability
- consistency of effect with related findings
- magnitude of effect
- adequacy of controlling threats to internal validity
clinical replication
the administration of a treatment package containing two or more distinct treatment procedures by the same investigator administered in a specific setting to a series of clients presenting similar combinations of multiple behavioral and emotional problems, which usually cluster together
systematic replication
when a researcher carries out a planned series of studies that incorporate systematic changes from one study to the next and identifies them as a replication series
