American Speech-Language-Hearing Association

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Statement of Types of Evidence

Many presentations at ASHA's Annual Convention focus on treatment procedures. It is important that presenters and audience participants in each session be aware of the types of evidence available that support each technique being presented. Many associations consciously or unconsciously place more value on treatment procedures that have more published evidence in peer-reviewed journals to support their effectiveness. Presenters and audience participants alike should be aware of the amount of evidence available for each technique advocated.

Presenters should include information on the types of evidence and research design in the summary portion of their submission:

Types of Evidence

Case Study (i.e. one subject)

Single subject design
Control subjects used yes_____ no _____
Specify total number of treatment studied _____
Specify total number of subjects used _____

Retrospective, non-randomized group design
Control subjects used yes_____ no _____
Specify total number of treatment studied _____
Specify total number of subjects used _____

Prospective, non-randomized group design
Control subjects used yes_____ no _____
Specify total number of treatment studied _____
Specify total number of subjects used _____

Prospective, randomized group design
Control subjects used yes_____ no _____
Specify total number of treatment studied _____
Specify total number of subjects used _____

ASHA's inclusion of any presentation does not imply endorsement of course content, specific products, or clinical procedures.

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