Repetition Priming and Anomia: An Investigation of Stimulus Dosage

1
Repetition Priming and Anomia An Investigation
of Stimulus Dosage
Catherine A. Off, Ph.C., CCC-SLP 1 Holly
Kavalier, B.A. 1 Margaret A. Rogers, Ph.D.1, 2
CCC-SLP Kristie Spencer, Ph.D., CCC-SLP 1
1Department of Speech Hearing Sciences,
University of Washington, Seattle, Washington
2American Speech-Language-Hearing Association,
Rockville, MD
Repetition Matters
Accuracy Results
Participants

• Integrating Principles of Neuroplasticity into
  clinical practice is necessary to optimize
  rehabilitative outcomes.
• Repetition is fundamental to skill learning and
  re-learning
• Motor learning, at both behavioral and neural
  levels, requires hundreds of trials
• The current investigation examines the
  application of repetition to improve naming
  performance in individuals with chronic aphasia.
  Though repetition is a ubiquitous component of
  anomia treatment protocols, and may be one of the
  most potent sources of change, systematic
  investigation of the influence of stimulus dosage
  on naming performance has yet to be reported,
  particularly with respect to the acquisition and
  maintenance of trained items, generalization to
  untrained items and generalization to alternate
  exemplars of trained items.

• Characteristics of Repetition Priming (Healthy
  Adults)
• Increases Reaction Time and Improves Accuracy on
  Subsequent Trials
• Persistent Across Time (Cave, 1997)
• Sensitive to of Repetitions (Brown, Jones,
  Mitchell, 1988 Reber, Gitelman, Parrish,
  Mesulam, 2004 )
• Item Specific (Brown, Jones, Mitchell, 1996)
• Generalizes to Alternate Exemplars (Koutstaal,
  Wagner, Rotte et al., 2001)

Experimental Questions and Independent Variables
Design
Single Subject ABA Design with Replication across
4 Individuals with Aphasia and 1
Non-Brain-Injured, Age- and Gender-Matched
Control Probe Sessions 40 Trained Items 20
Untrained Items Balanced for Syllable Length and
Word Frequency Training Sessions 40 Trained
Items 20 1-Trials/Session 20 4-Trials/Session
Balanced for Syllable Length and Word
Frequency Dependent Variables Response Accuracy
(Live and Audio-Recorded Samples) and Response
Time (Measured by E-Prime - milliseconds) Reliabi
lity All Probe Sessions Transcribed and Coded
for both Accuracy and Error Type by Independent
Judges Blinded to Training Variables
Response Time Results (ms)
dBusk Serlins d
Delivery Schedule
Discussion
Training Sessions
Stimulus Dosage by Participant