Section D

NOTES:

MULTIPLE BASELINE DESIGN:

- weakest experimental control and showing functional relation between IV & DV (less repetition of conditions per participant).

- use with irreversible BX, Bx that cannot be unlearned.

- good for measuring generalization across subjects/settings.

- do not introduce intervention / IV if baseline is not stable.

REVERSAL (ABABAB) DESIGN:

- strongest experimental control = more repetition of removal and introduction of the IV or intervention.

- do not use on severe or dangerous BX, since this requires removal of intervention.

- experimental control is present with stable responding within each phase / the BX follows each criterion closely.

- do not introduce intervention / IV if baseline is not stable.

MULTI-ELEMENT / ALTERNATING TREATMENTS DESIGN:

- alternated across sessions daily / in a day / during the same session.

- look for "rapid alternating".

- single BX / DV with 1 or more intervention IV.

- eliminates sequencing effect.

- best to use for severe and aggressive BX. it doesn't require baseline.

- does not require withdrawal or reversal to show functional relation.

- best to use for BX that needs intervention immediately.

- used frequently for functional analysis.

- cons: confounding effects of one treatment on BX due to the other treatment.

CHANGING CRITERION DESIGN:

- look for "gradual or stepwise".

- BX must already be in the subject's repertoire.

- can be used to increase or decrease target BX.

- do not use if teaching a new skill.

- do not use for BX that needs to increase/decrease quickly.

OTHER VARIATIONS OF MULTIPLE BASELINE:

MULTIPLE PROBE:

- data are collected simultaneously throughout the BL phase for ach Bx / setting / subject.

- look for "intermittent measures / probes", "acquiring first steps of intervention", "discontinuous data collection".

DELAYED MULTIPLE BASELINE:

- subsequent BLs are added in staggered or delayed fashion.

- use when full scale MB is impractical; limited resources.

- new subjects / Bx/ settings become available and could be appropriate to add to the experimental design.

SAMPLE QUIZ 

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